IGNS W DES E N R O DED F T PART OMMEN REPLACEMEN C E R T D NO MENDE 29044A R E C OM ISL Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital Output ISL29044 Features The ISL29044 is an integrated ambient and infrared light-to-digital converter with a built-in IR LED and I2C Interface (SMBus Compatible). This device uses two independent ADCs for concurrently measuring ambient light and proximity in parallel. The flexible interrupt scheme is designed for minimal microcontroller utilization. * Internal LED + Sensor = Complete Solution For ambient light sensor (ALS) data conversions, an ADC converts photodiode current (with a light sensitivity range up to 2000 Lux) in 100ms per sample. The ADC rejects 50Hz/60Hz flicker noise caused by artificial light sources. * Pb-Free (RoHS compliant) For proximity sensor (Prox) data conversions, the built-in driver turns on an internal infrared LED and the proximity sensor ADC converts the reflected IR intensity to digital. This ADC rejects ambient IR noise (such as sunlight) and has a 547s conversion time. * Adjustable interrupt persistency - 1/4/8/16 consecutive triggers required before interrupt * Works under all light sources including sunlight * Dual ADCs measure ALS/Prox concurrently * <1.0A Supply current when powered down * Temperature compensated Intelligent and Flexible Interrupts * Independent ALS/Prox interrupt thresholds Applications * Display and keypad dimming adjustment and proximity sensing for: - Mobile devices: Smart phone, PDA, GPS - Computing devices: Laptop PC, Netbook, Tablet PC - Consumer devices: LCD-TV, digital picture frame, digital camera - Industrial and medical light and proximity sensing The ISL29044 provides low power operation of ALS and proximity sensing with a typical 133A normal operation current (108A for sensors and internal circuitry, ~25A for LED) with 220mA current pulses for a net 100s, repeating every 800ms (or under). The ISL29044 uses both a hardware pin and software bits to indicate an interrupt event has occurred. An ALS interrupt is defined as a measurement that is outside a set window. A proximity interrupt is defined as a measurement over a threshold limit. The user may also require that both ALS/Prox interrupts occur at once, up to 16 times in a row before activating the interrupt pin. Related Literature * See AN1436, "Proximity Sensors" The ISL29044 is designed to operate from 2.25V to 3.63V over the -40C to +85C ambient temperature range. It is packaged in a clear, lead-free 8 Ld ODFN package. V_PULLUP I2C SLAVE 0 8 SDA VDD 1 ISL29044 R1 RES1 C3 0.1F 5 LED- LED+ 4 6 IRDR GND 3 7 INT SCL 2 C1 0.1F 100 R2 RES1 I2C MASTER VDD I2C SLAVE 1 I2C SLAVE_n C2 SCL SCL 1F SDA SDA 2 I2C-DIAGRAM I C-DIAGRAM FIGURE 1. TYPICAL APPLICATION April 28, 2016 FN8305.2 90 80 R3 RES1 1 SCL SDA INT CONTROLLER 70 FSR (%) V_LED 220mA WHITE 60 50 110mA WHITE 40 30 20 10 0 0 220mA GREY 110mA GREY 20 40 60 80 100 DISTANCE (mm) 120 140 160 FIGURE 2. PROXIMITY RESPONSE vs DISTANCE CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC. 2012, 2016. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL29044 ISL29044 Block Diagram VDD 1 ALS PHOTODIODE ARRAY COMMAND REGISTER LIGHT DATA PROCESS ALS AND IR IR PHOTODIODE ARRAY DUAL CHANNEL ADCs DATA REGISTER I2C IREF INTERRUPT FOSC IR DRIVER 3 4 LED+ GND Pin Configuration 4 3 GND INT 7 2 SCL SDA 8 1 VDD INT 6 IRDR 5 LED- PIN# PIN NAME LED+ IRDR 6 7 Pin Descriptions ISL29044 (8 LD 2.36X3.94 (mm) OPTICAL CO-PACKAGE) TOP VIEW LED- 5 2 SCL 8 SDA DESCRIPTIONS 1 VDD Voltage supply 2.25V to 3.63V. 2 SCL I2C clock line can be pulled from 1.7V to above VDD, 3.63V max. 3 GND Ground 4 LED+ Anode of IR LED 5 LED- Cathode of IR LED 6 IRDR IR-LED driver pin - current flows into ISL29044 from LED cathode. 7 INT Interrupt pin; Logic output (open-drain) for interrupt. 8 SDA I2C data line can be pulled from 1.7V to above VDD, 3.63V max. Ordering Information PART NUMBER (Notes 1, 2, 3) TEMP. RANGE (C) ISL29044IROMZ-T7 -40 to +85 ISL29044IROMZ-EVALZ PACKAGE Tape & Reel (Pb-free) 8 Ld Optical Co-package PKG. DWG. # L8.2.36x3.94 Evaluation Board NOTES: 1. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets: molding compounds, die attach materials, NiPdAu plate (e4 termination finish), which are all RoHS compliant. The ISL29044 is compatible with limited SnPb and Pb-free soldering operations. The ISL29044 is MSL classified. See Tech Brief TB487 (Surface Mount Assembly Guidelines for Optical Co-Package Sensor and LED) for reflow profile and more information. 3. For more information on MSL please see tech brief TB477. 2 FN8305.2 April 28, 2016 ISL29044 Absolute Maximum Ratings Thermal Information (TA = +25C) VDD Supply Voltage between VDD and GND . . . . . . . . . . . . . . . . . . . . . .4.0V I2C Bus Pin Voltage (SCL, SDA). . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 4.0V I2C Bus Pin Current (SCL, SDA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10mA IRDR, LED+Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.5V INT Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 4.0V INT Pin Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10mA ESD Rating Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV Thermal Resistance (Typical) JA (C/W) JC (C/W) 8 Ld Optical Module Package (Notes 4, 5) 113 58 Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +90C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to +85C Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to +85C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB487 http://www.intersil.com/pbfree/Pb-FreeReflow.asp CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty. NOTES: 4. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 5. For JC, the "case temp" location is the center of the exposed metal pad on the package underside. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA Electrical Specifications PARAMETER VDD VDD = 3.0V, TA = +25C. DESCRIPTION CONDITION Power Supply Range 2.25 SR_VDD Power Supply Slew Rate VLED+ Voltage Supply for IR LED IDD_OFF Supply Current when Powered Down ALS_EN = 0; PROX_EN = 0 Supply Current for ALS+Prox in Sleep Time IDD_NORM IDD_PRX_SLP IDD_ALS VDD Rising Edge between 0.4V and 2.25V 3.0 3.63 0.5 V V/ms 5 V 0.05 0.8 A ALS_EN = 1; PROX_EN = 1 108 135 A Supply Current for Prox in Sleep Time ALS_EN = 0; PROX_EN = 1 79 A Supply Current for ALS ALS_EN = 1; PROX_EN = 0 94 A tINTGR_ALS 12-bit ALS Integration/Conversion Time tINTGR_PROX 8-bit Prox Integration/Conversion Time 88 ALS Result when Dark EAMBIENT = 0 lux, 2k Range DATAALS_F Full Scale ALS ADC Code EAMBIENT > Selected Range Maximum Lux (Note 9) 1 DATAALS_1 Light Count Output with LSB of 0.0302 lux/count E = 48lux, Fluorescent (Notes 7,9), ALS_RANGE = 0 DATAALS_2 Light Count Output With LSB of 0.4824 lux/count E = 288lux, Fluorescent (Note 7,9), ALS_RANGE = 1 Prox Measurement w/o Object in Path DATAPROX_F Full Scale Prox ADC Code 112 ms ms 3 Counts 4095 Counts Count Output Variation Over Three Light Sources: Ambient Light Sensing Fluorescent, Incandescent and Sunlight DATAPROX_0 100 0.51 DATAALS_0 DATA DATA MIN MAX (Note 6) TYP (Note 6) UNIT 447 15 % 1587 Counts 597 747 1 Counts Counts 255 Counts tr Rise Time for IRDR Sink Current RLOAD = 15 at IRDR pin, 20% to 80% 500 ns tf Fall Time for IRDR Sink Current RLOAD = 15 at IRDR pin, 80% to 20% 400 ns IIRDR_0 IRDR Sink Current PROX_DR = 0; VIRDR = 0.5V IIRDR_1 IRDR Sink Current PROX_DR = 1; VIRDR = 0.5V IRDR Leakage Current PROX_EN = 0; VDD = 3.63V (Note 8) VIRDR Acceptable Voltage Range on IRDR Pin Register bit PROX_DR = 0 tPULSE Net IIRDR On Time Per PROX Reading IIRDR_LEAK FI2C VI2C 85 3 125 208 0.001 0.5 1.7 mA mA 1 A 4.3 V 100 I2C Clock Rate Range Supply Voltage Range for I2C Interface 105 s 400 kHz 3.63 V FN8305.2 April 28, 2016 ISL29044 Electrical Specifications PARAMETER VDD = 3.0V, TA = +25C. (Continued) DESCRIPTION MIN MAX (Note 6) TYP (Note 6) UNIT CONDITION VIL SCL and SDA Input Low Voltage VIH SCL and SDA Input High Voltage ISDA SDA Current Sinking Capability VOL = 0.4V 3 5 mA IINT INT Current Sinking Capability VOL = 0.4V 3 5 mA (IIRDR)/(VIRDR) PROX_DR = 0; VIRDR = 0.5V to 4.3V 5.8 mA/V PSRRIRDR 0.55 V 1.25 V NOTES: 6. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design. 7. An LED is used in production test. The LED irradiance is calibrated to produce the same DATA count against a fluorescent light source of the same lux level. 8. Ability to guarantee IIRDR leakage of ~1nA is limited by test hardware. 9. For ALS applications under light-distorting glass, please see the section titled "ALS Range 1 Considerations" on page 9. IR-LED Specifications TA = +25C PARAMETER VF DESCRIPTION IR-LED Forward Voltage Drop CONDITION MIN (Note 6) TYP MAX (Note 6) UNIT IF = 200mA 2.0 V IF = 100mA 1.8 V IR IR-LED Reverse-Bias Current VR = 5.5V P IR-LED Peak Output Wavelength IF = 110mA 858 nm IR-LED Spectral Half-Width IF = 110mA 39 nm E IR-LED Radiant Power IF = 110mA 30 mW IR-LED Radiant Intensity (in 0.01sr) at 0 IF = 110mA 128 mW/sr I I2C Electrical Specifications PARAMETER 0.061 5 A For SCL and SDA unless otherwise noted, VDD = 3V, TA = +25C (Note 10). DESCRIPTION CONDITION MIN (Note 6) MAX TYP (Note 6) UNIT 1.7 3.63 V VI2C Supply Voltage Range for I2C Interface fSCL SCL Clock Frequency 400 kHz VIL SCL and SDA Input Low Voltage 0.55 V VIH SCL and SDA Input High Voltage Vhys Hysteresis of Schmitt Trigger Input VOL Low-level Output Voltage (Open-drain) at 4mA Sink Current Ii Input Leakage for each SDA, SCL Pin 1.25 V 0.05VDD V -10 0.4 V 10 A tSP Pulse Width of Spikes that must be Suppressed by the Input Filter 50 ns tAA SCL Falling Edge to SDA Output Data Valid 900 ns 1 pF Ci Capacitance for each SDA and SCL Pin tHD:STA Hold Time (Repeated) START Condition After this period, the first clock pulse is generated. 600 ns tLOW LOW Period of the SCL Clock Measured at the 30% of VDD crossing. 1300 ns tHIGH HIGH period of the SCL Clock 600 ns 4 FN8305.2 April 28, 2016 ISL29044 I2C Electrical Specifications PARAMETER For SCL and SDA unless otherwise noted, VDD = 3V, TA = +25C (Note 10). (Continued) DESCRIPTION CONDITION MIN (Note 6) MAX TYP (Note 6) UNIT tSU:STA Set-up Time for a Repeated START Condition 600 ns tHD:DAT Data Hold Time 30 ns tSU:DAT Data Set-up Time 100 ns tR Rise Time of both SDA and SCL Signals (Note 11) 20 + 0.1xCb ns tF Fall Time of both SDA and SCL Signals (Note 11) 20 + 0.1xCb ns Set-up Time for STOP Condition 600 ns Bus Free Time Between a STOP and START Condition 1300 ns tSU:STO tBUF Cb Capacitive Load for Each Bus Line 400 Maximum is determined by tR and tF 1 pF Rpull-up SDA and SCL System Bus Pull-up Resistor k tVD;DAT Data Valid Time 0.9 s tVD:ACK Data Valid Acknowledge Time 0.9 s VnL Noise Margin at the Low Level 0.1VDD V VnH Noise Margin at the High Level 0.2VDD V NOTES: 10. All parameters in I2C Electrical Specifications table are guaranteed by design and simulation. 11. Cb is the capacitance of the bus in pF. FIGURE 3. I2C TIMING DIAGRAM 5 FN8305.2 April 28, 2016 ISL29044 Typical Performance Curves VDD = 3.0V 100 1.0 90 FLUORESCENT 0.8 80 0.7 70 HALOGEN 0.5 INCAND. SUN 0.4 60 FSR (%) 0.6 50 40 0.3 30 0.2 20 0.1 10 0 1100 1050 WAVELENGTH (nm) 1000 950 900 850 800 750 700 650 600 WAVELENGTH (nm) 550 500 450 950 400 750 350 550 300 0 350 FIGURE 5. ISL29044 SENSITIVITY TO DIFFERENT WAVELENGTHS 1.0 4500 ALS RANGE 125 READING (COUNTS) FIGURE 4. SPECTRUM OF FOUR LIGHT SOURCES NORMALIZED BY LUMINOUS INTENSITY (LUX) SERIES1 0.8 0.6 0.4 0.2 4000 3500 3000 2500 1000 500 0 0 10 20 30 40 50 60 70 80 LUX METER (lux) 90 100 110 120 130 FIGURE 7. ALS TRANFER FUNCTION 2 LIGHT SOURCES (125 LUX RANGE) 160 ALS+PROX (DURING PROX SLEEP) 90 140 70 MEASURED IDD (A) 80 220mA WHITE 60 50 110mA WHITE 40 30 220mA GREY 20 0 0 WHITE LED 1500 100 10 HALOGEN 2000 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 FIGURE 6. ANGULAR SENSITIVITY OF ALS FSR (%) NORMALIZED INTENSITY 0.9 ALS-ONLY 120 100 80 PROX (DURING PROX SLEEP) 60 110mA GREY 20 40 60 80 100 120 140 DISTANCE (mm) FIGURE 8. PROX COUNTS vs DISTANCE WITH 10cmx10cm REFLECTORS 6 160 40 2.25 2.40 2.55 2.70 2.85 3.00 3.15 INPUT VDD (V) 3.30 3.45 3.60 FIGURE 9. VDD vs IDD FOR VARIOUS MODES OF OPERATION FN8305.2 April 28, 2016 ISL29044 Typical Performance Curves VDD = 3.0V (Continued) 0.02 240 220mA-MODE (PROX_DR = 1) 0.01 ALS % CHANGE IIRDR (mA) 220 200 180 160 140 BOARD 7 0 -0.01 -0.02 120 100 110mA-MODE (PROX_DR = 0) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -0.03 -50 -40 -30 -20 -10 0 VIRDR (V) TEMPERATURE (C) FIGURE 11. ALS RANGE1 OVER TEMP AT 75 LUX WHITE LED FIGURE 10. IRDR PULSE AMPLITUDE vs VIRDR 1.0 9.00E-01 0.9 8.00E-01 0.8 7.00E-01 0.7 6.00E-01 0.6 WATTS 1.00E+00 WATTS 10 20 30 40 50 60 70 80 90 100 5.00E-01 4.00E-01 0.5 0.4 90 80 70 60 50 40 30 20 10 0 -10 -20 ANGULAR () -30 -40 -50 -60 -70 -80 -90 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 0 -60 0.1 0.00E+00 -70 0.2 1.00E-01 -80 0.3 2.00E-01 -90 3.00E-01 ANGULAR () FIGURE 12. RADIATION EMISSION PATTERN IRLED TRANSVERSE FIGURE 13. IR-LED LATERAL EMISSION PATTERN (NORMALIZED INTENSITY vs TRANS) Lateral Transverse FIGURE 14. DEFINITION OF LATERAL AND TRANSVERSE AXES 7 FN8305.2 April 28, 2016 ISL29044 Principles of Operation Photodiodes and ADCs The ISL29044 contains two photodiode arrays, which convert photons (light) into current. The ALS photodiodes are constructed to mimic the human eye's wavelength response curve to visible light (see Figure 5). The ALS photodiodes' current output is digitized by a 12-bit ADC in 100ms. These 12 bits can be accessed by reading from I2C registers 0x9 and 0xA when the ADC conversion is completed. The ALS converter is a charge-balancing, integrating 12-bit ADC. Charge-balancing is best for converting small current signals in the presence of periodic AC noise. Integrating over 100ms highly rejects both 50Hz and 60Hz light flicker by picking the lowest integer number of cycles for both 50Hz/60Hz frequencies. ALS CONVERSION TIME = 100ms (FIXED) SEVERAL s BETWEEN CONVERSIONS When proximity sensing is enabled (PROX_EN = 1), the internal IR LED is driven for 0.1ms by the built-in IR LED driver through the IRDR pin. The amplitude of the IR LED current depends on Register 1 bit 3: PROX_DR. If this bit is low, the load will see a fixed 110mA current pulse. If this bit is high, the load on IRDR will see a fixed 220mA current pulse, as seen in Figure 16. LED+ INTERNAL IR-LED LED- PCB TRACE 100ms 100ms 100ms 100ms 100ms TIME 0.54ms FOR PROX CONVERSION 110mA (PROX_DR = 0) IRDR (IRDR IS HI-Z WHEN NOT DRIVING) TIME IRDR (CURRENT DRIVER) Proximity Sensing 220mA (PROX_DR = 1) ALS ACTIVE PROX SENSOR ACTIVE When the part is programmed for infrared (IR) sensing (ALSIR_MODE = 1; ALS_EN = 1), infrared light is converted into a current and digitized by the same ALS ADC. The result of an IR conversion is strongly related to the amount of IR energy incident on our sensor, but is unitless and is referred to in digital counts. SERIES OF CURRENT PULSES TOTALING 0.1ms TIME SLEEP TIME (PROX_SLP) FIGURE 15. TIMING DIAGRAM FOR PROX/ALS EVENTS - NOT TO SCALE FIGURE 16. CURRENT DRIVE MODE OPTIONS When the IR from the LED reaches an object and gets reflected back into the ISL29044, the reflected IR light is converted into current as per the IR spectral response shown in Figure 5. One entire proximity measurement takes 0.54ms for one conversion (which includes 0.1ms spent driving the LED), and the period between proximity measurements is decided by PROX_SLP (sleep time) in Register 1 Bits 6:4. Average LED driving current consumption is given by Equation 1. The proximity sensor is an 8-bit ADC that operates in a similar fashion. When proximity sensing is enabled, the IRDR pin will drive the internal infrared LED, the emitted IR reflects off an object (e.g., a human head) back into the ISL29044, and a sensor converts the reflected IR wave to a current signal in 0.54ms. The ADC subtracts the IR reading before and after the LED is driven (to remove ambient IR such as sunlight), and converts this value to a digital count stored in Register 0x8. The ISL29044 is designed to run two conversions concurrently: a proximity conversion and an ALS (or IR) conversion. Please note that because of the conversion times, the user must let the ADCs perform one full conversion first before reading from I2C Registers PROX_DATA (wait 0.54ms) or ALSIR_DT1/2 (wait 100ms). The timing between ALS and Prox conversions is arbitrary (as shown in Figure 15). The ALS runs continuously with new data available every 100ms. The proximity sensor runs continuously with a time between conversions decided by PROX_SLP (Register 1 Bits [6:4]). Ambient Light and IR Sensing The ISL29044 is set for ambient light sensing when Register bit ALSIR_MODE = 0 and ALR_EN = 1. The light-wavelength response of the ALS appears as shown in Figure 5. ALS measuring mode (as opposed to IR measuring mode) is set by default. 8 I lRDR ;PEAK 100s I lRDR ;AVG = -------------------------------------------------------t SLEEP (EQ. 1) A typical IRDR scheme is 220mA amplitude pulses every 800ms, which yields 28A DC. Total Current Consumption Total current consumption is the sum of IDD and IIRDR. The IRDR pin sinks current (as shown in Figure 16) and the average IRDR current can be calculated using Equation 1. IDD depends on voltage and the mode-of-operation, as seen in Figure 9. Interrupt Function The ISL29044 has an intelligent interrupt scheme designed to shift some logic processing away from intensive microcontroller I2C polling routines (which consume power) and towards a more independent light sensor, which can instruct a system to "wake up" or "go to sleep". An ALS interrupt event (ALS_FLAG) is governed by Registers 5 through 7. The user writes a high and low threshold value to these registers and the ISL29044 will issue an ALS interrupt flag if the actual count stored in Registers 0x9 and 0xA are outside the user's programmed window. The user must write 0 to clear the ALS_FLAG. FN8305.2 April 28, 2016 ISL29044 A proximity interrupt event (PROX_FLAG) is governed by the high and low thresholds in registers 3 and 4 (PROX_LT and PROX_HT). PROX_FLAG is set when the measured proximity data is more than the higher threshold X-times-in-a-row (X is set by user; see following paragraph). The proximity interrupt flag is cleared when the prox data is lower than the low proximity threshold X-times-in-a-row, or when the user writes "0" to PROX_FLAG. Interrupt persistency is another useful option available for both ALS and proximity measurements. Persistency requires X-in-arow interrupt flags before the INT pin is driven low. Both ALS and Prox have their own independent interrupt persistency options. See ALS_PRST and PROX_PRST bits in Register 2. The final interrupt option is the ability to AND or OR the two interrupt flags using Register 2 Bit 0 (INT_CTRL). If the user wants both ALS/Prox interrupts to happen at the same time before changing the state of the interrupt pin, set this bit high. If the user wants the interrupt pin to change state when either the ALS or the Proximity interrupt flag goes high, leave this bit to its default of 0. ALS Range 1 Considerations When measuring ALS counts higher than 1800 on range 1 (ALSIR_MODE = 0, ALS_RANGE = 0, ALS_DATA > 1800), switch to range 2 (change the ALS_RANGE bit from "0" to "1") and re-measure ALS counts. This recommendation pertains only to applications where the light incident upon the sensor is IR-heavy and is distorted by tinted glass that increases the ratio of infrared to visible light. For more information, please contact the factory. VDD Power-up and Power Supply Considerations Upon power-up, please ensure a VDD slew rate of 0.5V/ms or greater. After power-up, or if the user's power supply temporarily deviates from our specification (2.25V to 3.63V), Intersil recommends the user write the following: write 0x00 to register 0x01, write 0x29 to register 0x0F, write 0x00 to register 0x0E, and write 0x00 to register 0x0F. The user should then wait ~1ms or more and then rewrite all registers to the desired values. If the user prefers a hardware reset method instead of writing to test registers: set VDD = 0V for 1 second or more, power back up at the required slew rate, and write registers to the desired values. Power-Down To put the ISL29044 into a power-down state, the user can set both PROX_EN and ALS_EN bits to 0 in Register 1 or more; simply set all of Register 1 to 0x00. 9 Serial Interface The ISL29044 supports the Inter-Integrated Circuit (I2C) bus data transmission protocol. The I2C bus is a two wire serial bidirectional interface consisting of SCL (clock) and SDA (data). Both the wires are connected to the device supply via pull-up resistors. The I2C protocol defines any device that sends data onto the bus as a transmitter and the receiving device as the receiver. The device controlling the transfer is a master and the device being controlled is the slave. The transmitting device pulls down the SDA line to transmit a "0" and releases it to transmit a "1". The master always initiates the data transfer, only when the bus is not busy, and provides the clock for both transmit and receive operations. The ISL29044 operates as a slave device in all applications. The serial communication over the I2C interface is conducted by sending the most significant bit (MSB) of each byte of data first. Start Condition During data transfer, the SDA line must remain stable while the SCL line is HIGH. All I2C interface operations must begin with a START condition, which is a HIGH to LOW transition of SDA while SCL is HIGH (refer to Figure 17). The ISL29044 continuously monitors the SDA and SCL lines for the START condition and does not respond to any command until this condition is met (refer to Figure 17). A START condition is ignored during the power-up sequence. Stop Condition All I2C interface operations must be terminated by a STOP condition, which is a LOW-to-HIGH transition of SDA while SCL is HIGH (refer to Figure 17). A STOP condition at the end of a read/write operation places the device in its standby mode. If a stop is issued in the middle of a Data byte, or before 1 full Data byte + ACK is sent, then the serial communication of ISL29044 resets itself without performing the read/write. The contents of the array are not affected. Acknowledge An acknowledge (ACK) is a software convention used to indicate a successful data transfer. The transmitting device releases the SDA bus after transmitting 8-bits. During the ninth clock cycle, the receiver pulls the SDA line LOW to acknowledge the reception of the eight bits of data (refer to Figure 17). The ISL29044 responds with an ACK after recognition of a START condition followed by a valid Identification Byte, and once again, after successful receipt of an Address Byte. The ISL29044 also responds with an ACK after receiving a Data byte of a write operation. The master must respond with an ACK after receiving a Data byte of a read operation. FN8305.2 April 28, 2016 ISL29044 8th CLk SCL FROM MASTER 9th CLk HIGH IMPEDANCE SDA FROM TRANSMITTER SDA FROM RECEIVER DATA STABLE START DATA CHANGE DATA STABLE ACK STOP FIGURE 17. START, DATA STABLE, ACKNOWLEDGE, AND STOP CONDITION Device Addressing BURST WRITE Following a START condition, the master must output a Device Address byte. The 7 MSBs of the Device Address byte are known as the device identifier. The device identifier bits of ISL29044 are internally hard-wired as "1000100". The LSB of the Device Address byte is defined as read or write (R/W) bit. When this R/W bit is a "1", a read operation is selected and when "0", a write operation is selected (refer to Figure 18). The master generates a START condition followed by Device Address byte 1000100x (x as R/W) and the ISL29044 compares it with the internal device identifier. Upon a correct comparison, the device outputs an acknowledge (LOW) on the SDA line (refer to Figure 17). The ISL29044 has a burst write operation, which allows the master to write multiple consecutive bytes from a specific address location. It is initiated in the same manner as the byte write operation, but instead of terminating the write cycle after the first Data byte is transferred, the master can write to the whole register array. After the receipt of each byte, the ISL29044 responds with an acknowledge, and the address is internally incremented by one. The address pointer remains at the last address byte written. When the counter reaches the end of the register address list, it "rolls over" and goes back to the first Register Address. 1 A7 D7 0 A6 D6 0 A5 D5 0 A4 D4 1 0 A3 A2 D3 D2 0 A1 D1 R/W DEVICE ADDRESS BYTE A0 REGISTER ADDRESS BYTE D0 DATA BYTE FIGURE 18. DEVICE ADDDRESS, REGISTER ADDRESS, & DATA BYTE Write Operation BYTE WRITE In a byte write operation, ISL29044 requires the Device Address byte, Register Address byte, and the Data byte. The master starts the communication with a START condition. Upon receipt of the Device Address byte, Register Address byte, and the Data byte, the ISL29044 responds with an acknowledge (ACK). Following the ISL29044 data acknowledge response, the master terminates the transfer by generating a STOP condition. The ISL29044 then begins an internal write cycle of the data to the volatile memory. During the internal write cycle, the device inputs are disabled and the SDA line is in a high impedance state, so the device will not respond to any requests from the master (refer to Figure 19). SIGNAL FROM MASTER DEVICE SIGNAL AT SDA SIGNALS FROM SLAVE DEVICE S T DEVICE ADDRESS A BYTE R T ADDRESS BYTE S T O P DATA BYTE Read Operation The ISL29044 has two basic read operations: Byte Read and Burst Read. BYTE READ Byte read operations allow the master to access any register location in the ISL29044. The Byte read operation is a two step process. The master issues the START condition and the Device Address byte with the R/W bit set to "0", receives an acknowledge, then issues the Register Address byte. After acknowledging receipt of the register address byte, the master immediately issues another START condition and the Device Address byte with the R/W bit set to "1". This is followed by an acknowledge from the device and then by the 8-bit data word. The master terminates the read operation by not responding with an acknowledge and then issuing a stop condition (refer to Figure 20). BURST READ Burst read operation is identical to the Byte Read operation. After the first Data byte is transmitted, the master responds with an acknowledge, indicating it requires additional data. The device continues to output data for each acknowledge received. The master terminates the read operation by not responding with an acknowledge but issuing a STOP condition (refer to Figure 21). For more information about the I2C standard, please consult the PhilipsTM I2C specification documents. 1 0 0 0 1 0 0 0 A C K A C K A C K FIGURE 19. BYTE WRITE SEQUENCE 10 FN8305.2 April 28, 2016 ISL29044 SIGNAL FROM MASTER DEVICE START DEVICE ADDRESS WRITE ADDRESS BYTE START 1 0 0 0 1 0 0 0 SIGNAL AT SDA DATA BYTE STOP 1 0 0 0 1 0 0 1 A C K SIGNALS FROM SLAVE DEVICE DEVICE ADDRESS READ A C K A C K FIGURE 20. BYTE ADDRESS READ SEQUENCE SIGNAL FROM DEVICE ADDRESS MASTER WRITE DEVICE START SIGNAL AT SDA SIGNALS FROM SLAVE DEVICE DEVICE ADDRESS ADDRESS BYTE READ START 1 0 0 0 1 0 0 0 DATA BYTE 2 DATA BYTE 1 DATA BYTE n STOP 1 0 0 0 1 0 0 1 A C K A C K A C K A C K A C K ("n" is any integer greater than 1) FIGURE 21. BURST READ SEQUENCE 11 FN8305.2 April 28, 2016 ISL29044 Register Map Following are detailed descriptions of the control registers related to the operation of the ISL29044 ambient light sensor device. These registers are accessed by the I2C serial interface. For details on the I2C interface, refer to "Serial Interface" on page 9. All the functionalities of the device are controlled by the registers. The ADC data can also be read. The following sections explain the details of each register bit. All RESERVED bits must be set to zero, unless otherwise specified. Register Descriptions TABLE 1. ISL29044 REGISTERS AND REGISTER BITS BIT ADDR REG NAME 7 6 5 4 3 2 1 0 DEFAULT 0x00 ChipID 1 1 0 1 0 0 0 0 0xB0 0x01 CONFIGURE PROX EN PROX_DR ALS_EN 0x02 INTERRUPT PROX_FLAG 0x03 PROX_LT PROX_LT[7:0] 0x00 0x04 PROX_HT PROX_HT[7:0] 0xFF 0x05 ALSIR_TH1 ALSIR_LT[7:0] 0x00 0x06 ALSIR_TH2 0x07 ALSIR_TH3 ALSIR_HT[11:4] 0xFF 0x08 PROX_DATA PROX_DATA[7:0] 0x00 0x09 ALSIR_DT1 ALSIR_DATA[7:0] 0x00 0x0A ALSIR_DT2 PROX_SLP[2:0] PROX_PRST[1:0] (Write 0) RO (Unused) B7 B6 B5 B4 B3 B2 B1 B0 DFLT (Hex) 1 1 0 1 0 0 0 0 0xB0 TABLE 4. ALS/IR DATA BIT BIT 0 TABLE 3. CONFIGURE REGISTER ADDRESS Configure RW 0x01 B6 B5 PROX _EN PROX _S2 PROX _S1 B4 B3 B2 PROX PRO ALS/I _X0 X_DR R_EN OPERATION 0 Visible Spectrum ALS sensing data 1 IR Spectrum sensing data FULL SCALE RANGE [B1] Register Bits B7 0x00 The ALS/IR data mode bit is a select mode for fetching data from the data register (reg 0x09 and reg 0x0A). If B0 is set to 0, the ALS/IR data register will contain visible spectrum ALS sensing data. If B0 is set to 1, the ALS/IR data register will contain IR spectrum sensing data. Configure Register (Address: 0x01) NAME 0x00 ALS/IR DATA BIT [B0] This is a reserved register. Do not write or read Reg. Access Addr (Hex) 0x00 0xF0 ALSIR_DATA[11:8] Register Bits 0x00 INT_CTRL ALSIR_LT[11:8] TABLE 2. ChipID REGISTER ADDRESS ChipID ALS_PRST[1:0] ALSIR_HT[3:0] Register (Address: 0x00) Reg. Addr NAME Access (Hex) ALS_FLAG ALS_RANGE ALSIR_MODE B1 B0 ALS_ RANGE ALS/IR data DFLT (Hex) 0x00 The Full Scale Range (FSR) has two selectable ranges. Each range has a maximum allowable lux value. The higher the range value, the better the resolution and the wider the ALS lux value. TABLE 5. RANGE REGISTER BITS The Configure register consists all of control bits for both ALS Sensing and Proximity Sensing. This register determines operation mode. The register has one Enable Prox sensing bit, three Proximity Sleep mode bits, one proximity current driver bit, one Enable ALS/IR sensing bit, one ALS/IR range bit, and one ALS/IR sensing data bits. The default register value is 0x00 at power on. 12 BIT1 RANGE(k) FSR (LUX) @ VISIBLE ALS SENSING 0 Range1 125 1 Range2 2000 ALS/IR_EN [B2] The ALS/IR_EN bit[B2] is the enable bit for both ALS sensing and IR sensing. If [B2] is 0, ALS sensing an IR sensing is disabled. If [B2] is 1, ALS sensing and IR sensing is enabled. FN8305.2 April 28, 2016 ISL29044 TABLE 6. RANGE REGISTER BITS Interrupt Register (Address: 0x02) OPERATION TABLE 10. INTERRUP REGISTER ADDRESS BIT 0 0 Disable ALS sensing and IR sensing 1 Enable ALS sensing and IR sensing PROX_DR[B3] NAME Access INTERRUPT PROX_DR bit[B3] selects the IR driver current strength. The IR driver sinks current through the LDR pin. The drive capability can be programmed through [B3] either a pulse 110mA current sink or 220mA pulse current sink. The higher the amplitude, the better the range of detection. TABLE 7. CURRENT DRIVER REGISTER BITS BIT 0 OPERATION 0 110mA current sink 1 220mA current sink PROX SLEEP MODE [B6,B5,B4] ISL29044 is equipped with multiple sleep modes in proximity sensing. It is a good power saving feature. The different sleep modes can be selected by setting [B6-B4] bits on register 0x01. When proximity sensing is enabled, the ADC converts for 0.54ms and sleeps for 800ms by default. Table 8 lists the possible operating sleep modes. TABLE 8. SLEEP MODES BITS B6 B5 B4 0 0 0 SLEEP TIME OPERATION (msec) RW B6 B5 B4 B3 0x02 PROX_ FLAG PROX_ PRST1 PROX_ PRST0 0 ALS/IR _FLAG 1 0 200 0 1 1 100 1 0 0 75 1 0 1 50 1 1 0 12.5 1 1 1 0.0 (Sleep Mode Disabled) PROX_EN[B7]. Proximity is enabled when PROX_EN[B7] is set to high. 0 Disable proximity sensing (Default) 1 Enable proximity sensing 0x00 OPERATION ALS/IR INTERRUPT PERSIST BITS [B2,B1] The interrupt persist bits[B2LOL, B1] provide control when interrupts occur. There are four different selections for this feature. A value of N (where N is 1, 4, 8, and 16) results in an interrupt only if the value remains outside the threshold window for N consecutive integration cycles. For example, if N is equal to 8 and the integration time is 100ms. An interrupt is generated whenever the last conversion results in a value outside of the programmed threshold window. Table 12 lists the possible interrupt persist bits. TABLE 12. INTERRUPT PERSIST BITS TABLE 9. EN_PROXIMITY REGISTER BITS CURRENT DRIVER OPERATION ALS/IR ALS/IR_ INT_CTRL _PRST1 PRSST0 DFLT (Hex) TABLE 11. INTERRUPT CONTROL REGISTER BITS BIT 0 Logical AND 0 B0 INT_CTRL [B0] can be programmed to cause an interrupt when either ALS_FLAG or PROX_FLAG go high or when both go high. Writing `0' will do a logical OR and a one will do a logical AND. The INT pin is open-drain therefore, in this INT_CTRL bit, there are two options to make the INT pin go low. Once the interrupt is triggered, the INT pin goes low if the PROX_FLAG bit or ALS_FLAG goes high in logic OR option. Otherwise, the interrupt is triggered and the INT pin goes low if the PROX_FLAG bit and ALS_FLAG go high in logic AND option. Both the INT pin and these interrupt status bits are automatically cleared when writing `0' to those flag bits. Table 11 shows interrupt control bits. Logical OR 400 B1 INT_CTRL[B0] 1 1 B2 The Interrupt register consists of all status bits. The ISL29044 has an interrupt scheme designed for both ALS/IR sensing and Proximity logic detection sensing. The register has one proximity sensing flag bit, two proximity sensing persistent bits, one ALS/IR sensing flag bit and two ALS/IR persistent bits. The default register value is 0x00. 0 0 13 B7 Register Bits 800 (Default) 0 BIT 0 Reg. Addr (Hex) B2 B1 NUMBER OF INTEGRATION CYCLES (n) 0 0 1 0 1 4 1 0 8 1 1 16 FN8305.2 April 28, 2016 ISL29044 PROX_TL Registers (Address: 0x03) ALS_FLAG BIT [B3] The ALS_FLAG[B3] bit is a status bit for light intensity detection. The bit is set to logic HIGH when the light intensity results at (reg 0x09, 0x0A), crosses the interrupt threshold's window (register address 0x05 - 0x07), and is set to logic LOW when its within the interrupt threshold's window. Once the interrupt is triggered, the ALS_FLAG bit goes HIGH. The ALS/IR_FLAG bit is cleared by writing `0' to [B3]. Table 13 shows interrupt flag states. TABLE 13. INTERRUPT FLAG BIT BIT 3 OPERATION 0 Interrupt is cleared or not triggered yet 1 Interrupt is triggered PROXIMITY INTERRUPT PERSIST BITS [B6,B5] The interrupt persist bits provide control over when interrupts occur. There are four different selections for this feature. A value of N (where N is 1, 4, 8, and 16) results in an interrupt only if the value remains above the PROX_HT (reg0x04) threshold for N consecutive integration. At that moment, the PROX_FLAG is high and remains asserted until cleared by writing the '0' to PROX_FLAG bit or if the value is below PROX_LT (reg0x03) threshold for N consecutive integration, it will also clear the PROX_FLAG. For example, if N is equal to 8, then an interrupt is generated whenever the last conversion results in a value above the PROX_HT threshold, then PROX_FLAG = 1. There are two ways of clearing the PROX_FLAG. You can write a 0h to Reg0x02 to manually clear the flag, or if the conversion results are less than the PROX_LT value, upon completion of the measurement, the Reg0x02 will be set to 0h and thus, the PROX_FLAG will be automatically cleared. TABLE 14. PROXIMITY LOGIC PERSIST BITS TABLE 16. PROX_TL REGISTER BITS Reg. Addr Access (Hex) B7 NAME PROX_TL RW Register Bits B6 B5 B4 B3 B2 DFLT B0 (Hex) B1 0x03 TL7 TL6 TL5 TL4 TL3 TL2 TL1 TL0 0x00 The lower interrupt threshold registers are used to set the lower trigger point for interrupt generation. If the Prox value crosses below or is equal to the lower threshold, it will be clear the last state of Interrupt. For example, if PROX_FLAG is high at the last state, then the proximity value is below the PROX_LT threshold and the PROX_FLAG will go low at this moment. The register defaults to 0x00 on power-up. PROX_TH Registers (Address: 0x04) TABLE 17. PROX_TH REGISTER BITS Reg. Addr Access (Hex) B7 NAME PROX_TH RW Register Bits B6 B5 B4 B3 B2 B1 DFLT B0 (Hex) 0x04 TH7 TH6 TH5 TH4 TH3 TH2 TH1 TH0 0xFF The upper proximity threshold registers are used to set the upper trigger point for Logic HIGH (Near). If the Prox value crosses above or is equal to the upper threshold, a Logic HIGH (Far) is asserted on the interrupt flag. Registers PROX_HT(0x04) are set to upper threshold. 0x04 register is defaulted to 0xFF on power-up. ALS_TH1 and ALS_TH2 Registers (Address: 0x05 & 0x06[B3,B2,B1,B0]) TABLE 18. INTERRUPT THRESHOLD LOW REGISTER BITS B2 B1 NUMBER OF INTEGRATION CYCLES (n) 0 0 1 0 1 4 1 0 8 ALS_TH2_MSB RW 0x06 1 1 16 ALS_TH1_LSB RW 0x05 TL7 TL6 TL5 TL4 TL3 TL2 TL1 TL0 0x00 PROX_FLAG BIT [B7] PROX_FLAG bit [B7] is a status bit for IR light intensity detection. [B7] is set to logic HIGH when the IR light intensity reflected from the object to the sensor(reg 0x08) crosses the PROX_HT(register address 0x04), and if [B7] is set to logic LOW when the IR light intensity goes lower than PROX_LT (register address 0x03) or to clear by writing `0' to PROX_FLAG. Table 15 shows the interrupt flag states. NAME Register Bits Reg. DFLT Addr Access (Hex) B7 B6 B5 B4 B3 B2 B1 B0 (Hex) TL3 TL2 TL1 TL0 0x00 The lower interrupt threshold registers are used to set the lower trigger point for interrupt generation. If the ALS value crosses below or is equal to the lower threshold, an interrupt is asserted on the interrupt flag. An 8-bit RW Register ALS_TH1(0x05) and a nibble ALS_TH2(0x06[B3,B2,B1,B0]) provides the low and high bytes, respectively, of the lower interrupt threshold. The high and low bytes from each set of registers are combined to form a 12-bit threshold value. The interrupt threshold registers default to 0x00 on power-up. TABLE 15. INTERRUPT FLAG BIT BIT 3 OPERATION 0 Logic Low (Far) 1 Logic High (Near) 14 FN8305.2 April 28, 2016 ISL29044 ALS_TH2 and ALS_TH3 Registers (Address: 0x06[B7,B6,B5,B4] & 0X07) by the range bit ALS_RANGE (register 0x1 bit 1) and is independent of the light source type. TABLE 22. ALS SENSITIVITY AT DIFFERENT RANGES TABLE 19. INTERRUPT THRESHOLD HIGH REGISTER BITS Reg. Addr Access (Hex) B7 NAME Register Bits B6 B5 B4 B3 B2 B1 DFLT B0 (Hex) ALS_TH2_LSB RW 0x06 TH7 TH6 TH5 TH4 0xF0 ALS_TH3_MSB RW 0x07 TH7 TH6 TH5 TH4 TH3 TH2 TH1 TH0 0xFF The upper interrupt threshold registers are used to set the upper trigger point for interrupt generation. If the ALS value crosses above or is equal to the upper threshold, an interrupt is asserted on the interrupt pin and the interrupt flag. A nibble RW Register ALS_TH(0x06[B7,B6,B5,B4]) and an 8-bit RW ALS_TH3(0x07) provides the low and high bytes, respectively, of the upper interrupt threshold. The high and low bytes from each set of registers are combined to form a 12-bit threshold value. The interrupt threshold registers default to 0xFF on power-up. Data Registers (Addresses: 0x08) TABLE 20. ADC REGISTER BITS Register Bits NAME ACCESS REG. ADDR (HEX) DFLT B7 B6 B5 B4 B3 B2 B1 B0 (Hex) DATA 0x08 D7 D6 D5 D4 D3 D2 D1 D0 0x00 RO The ISL29044 has 8-bit read-only registers to hold the ADC value. The registers are refreshed after every conversion cycle. The default register value is 0x00 at power on. Data Registers (Addresses: 0x09 & 0x0A) TABLE 21. ADC REGISTER BITS NAME Register Bits Reg. Addr DFLT Access (Hex) B7 B6 B5 B4 B3 B2 B1 B0 (Hex) DATALSB RO 0x09 DATAMSB RO 0x0A D7 D6 D5 D4 D3 D2 D1 D0 0x00 D11 D10 D9 D8 0x00 The ISL29044 has one 8-bit read-only register to hold the lower, and one nibble (4-bit read only) to hold the upper of the ADC value. The nibble (4-bit read only) is accessed at address 0x0A and the lower byte is accessed at address 0x09. For 12-bit resolution, the data is from D0 to D11. The registers are refreshed after every conversion cycle. The default register value is 0x00 at power on. RANGE ALS_RANGE (Lux/Count) 0 0.0326 1 0.522 Table 22 shows two different scale factors: one for the low range (ALS_RANGE = 0) and the other for the high range (ALS_RANGE = 1). Noise Rejection Charge balancing ADC's have excellent noise-rejection characteristics for periodic noise sources whose frequency is an integer multiple of the conversion rate. For instance, a 60Hz AC unwanted signal's sum from 0ms to k*16.66ms (k = 1,2...ki) is zero. Similarly, setting the device's integration time to be an integer multiple of the periodic noise signal greatly improves the light sensor output signal in the presence of noise. Since wall sockets may output at 60Hz or 50Hz, our integration time is 100ms: the lowest common integer number of cycles for both frequencies. Proximity Detection of Various Objects Proximity sensing relies on the amount of IR reflected back from objects. A perfectly black object would absorb all light and reflect no photons. The ISL29044 is sensitive enough to detect black ESD foam, which reflects only 1% of IR. For biological objects, blonde hair reflects more than brown hair and customers may notice that skin tissue is much more reflective than hair. IR penetrates into the skin and is reflected or scattered back from within. As a result, the proximity count peaks at contact and monotonically decreases as skin moves away. The reflective characteristics of skin are very different from that of paper. Soldering Considerations Convection heating is recommended for reflow soldering; direct-infrared heating is not recommended. The plastic ODFN package requires a custom reflow soldering profile pursuant to Figure 4 in TB487 (Surface Mount Assembly Guidelines for Optical Co-Package Sensor and LED). Applications Information Calculating Lux The ISL29044's ADC output codes are directly proportional to lux when in ALS mode (see ALSIR_MODE bit). (EQ. 2) E calc = RANGE OUT ADC In Equation 2, Ecalc is the calculated lux reading and OUT represents the ADC code. The constant to plug in is determined 15 FN8305.2 April 28, 2016 ISL29044 Suggested PCB Footprint Typical Circuit It is important that users check the "Surface Mount Assembly Guidelines for Optical Dual FlatPack No Lead (ODFN) Package" before starting ODFN product board mounting. However, this device requires a special solder reflow profile as mentioned in Figure 4 in TB487 (Surface Mount Assembly Guidelines for Optical Co-Package Sensor and LED). A typical application for the ISL29044 is shown in Figure 22. The ISL29044's I2C address is internally hardwired as 0b1000100. The device can be tied onto a system's I2C bus together with other I2C compliant devices. Layout Considerations The ISL29044 is relatively insensitive to layout. Like other I2C devices, it is intended to provide excellent performance even in significantly noisy environments. There are only a few considerations that will ensure best performance. Route the supply and I2C traces as far as possible from all sources of noise. 0.1F and 1F power supply decoupling capacitors need to be placed close to the device. V_LED V_PULLUP I2C SLAVE 0 5 6 7 8 LED- LED+ IRDR GND INT SDA SCL VDD 4 R1 RES1 C3 0.1F 2 1 C1 0.1F R3 RES1 I2C MASTER 3 SCL SDA VDD I2C SLAVE 1 ISL29044 R2 RES1 C2 1F I2C SLAVE_n SCL SCL SDA SDA I2C-DIAGRAM INT CONTROLLER I2C-DIAGRAM FIGURE 22. ISL29044 TYPICAL CIRCUIT 16 FN8305.2 April 28, 2016 ISL29044 5-LEDK 4-LEDA 1.3400 3-GND 6-LDR VSS IRDR GROUND SCL 1.0962 DIE ID: 7-INT 2-SCL INT YYYYY YYYYYYY VDD POWER 0.4888 SDA 8-SDA 1-VDD 0.4068 FIGURE 23. OPTICAL SENSOR LOCATION 17 FN8305.2 April 28, 2016 ISL29044 Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have the latest Rev. DATE REVISION CHANGE April 28, 2016 FN8305.2 Added Related Literature section. April 21, 2016 FN8305.1 Removed the Related Literature section. October 30, 2012 FN8305.0 Initial release. Products Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, handheld products, and notebooks. Intersil's product families address power management and analog signal processing functions. Go to www.intersil.com/products for a complete list of Intersil product families. To report errors or suggestions for this datasheet, please go to: www.intersil.com/askourstaff Reliability reports are available from our website at: http://rel.intersil.com/reports/search.php For additional products, see www.intersil.com/product_tree Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 18 FN8305.2 April 28, 2016 ISL29044 Package Outline Drawing L8.2.36x3.94 8 LEAD OPTICAL CO-PACKAGE Rev 0, 3/12 R0.4 Lens R0.49 Aperture 0.58 0.18 0.6 0.8 0.6 5-LEDK 3.94 R0.4 0.72 4-LEDA 0.16 1.3 3-GND 0.6 0.9 0.97 1-VDD 1.56 2.36 6-LDR 7-INT 2-SCL 0.75 0.63 0.19 1.35 0.25 0.63 0.16 8-SDA PIN 1 0.8 INDEX AREA BOTTOM VIEW 0.18 1.03 0.8 5-LEDK 6-LDR 3-GND 0.25 4-LEDA 7-INT 2-SCL 0.97 1.82 0.72 0.16 8-SDA 1-VDD 1.43 0.16 TOP VIEW TYPICAL RECOMMENDED LAND PATTERN NOTES: 19 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5m-1994. 3. Unless otherwise specified, tolerance: Decimal 0.05 4. Pin #1 identifier is a laser-etched dot on bottom surface. 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