EVALUATION KIT AVAILABLE MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps General Description Benefits and Features The MAX44259/MAX44260/MAX44261/MAX44263 offer a unique combination of high speed, precision, low noise, and low-voltage operation making them ideally suited for a large number of signal processing functions such as filtering and amplification of signals in portable and industrial equipment. S Low Noise for Higher System Accuracy * 12.7nV/Hz Input Voltage-Noise Density * 1.2fA/Hz Input Current-Noise Density * 50V (max) VOS at +25C * 110dB Total Harmonic Distortion S 15MHz Unity-Gain Bandwidth Enables for HighBandwidth Applications S Low Power Extends the Battery Life of Portable Equipment * 500fA Low Input Bias Current * 750A Quiescent Current per Amplifier * < 1A Supply Current in Shutdown S On-Demand VOS Self-Calibration (MAX44261) S Saves Board Space * Small, 2mm x 2mm SC70 and 1mm x 1.5mm Thin DFN (MAX44260) and SOT23 (MAX44259) Packages S Wide Supply Range from 1.8V to 5.5V Simplifies Power-Supply Requirements The devices' rail-to-rail input/outputs and low noise guarantee maximum dynamic range in demanding applications such as 12- to 14-bit SAR ADC drivers. Unlike traditional rail-to-rail input structures, input crossover distortion is absent due to an optimized input stage with an ultra-quiet charge pump. The MAX44260 includes a fast-power-on shutdown mode for further power savings. The MAX44261 offers a unique on-demand calibration pin where the user can invoke self-trimming of the input offset voltage. The MAX44263 is a dual amplifier. The family of parts operates from a supply range of 1.8V to 5.5V over the -40NC to +125NC temperature range and can operate down to 1.7V over the 0NC to +70NC temperature range. The MAX44259 is offered in a 5-pin SOT23 package. The MAX44260/MAX44261 are available in small, 6-pin SC70 packages. The MAX44260 is also available in a 1mm x 1.5mm thin DFN (ultra-thin LGA) package. The MAX44263 is available in a small 8-pin SC70 package. Applications Notebooks 3G/4G Handsets Portable Media Players Portable Medical Instruments Battery-Operated Devices Visit www.maximintegrated.com/products/patents for product patent marking information. Analog-to-Digital Converter Buffers Transimpedance Amplifiers Ordering Information appears at end of data sheet. Typical Application Circuit 15nF +3.3V 2.4kI 22kI 330pF MAX44260 10kI 3.3nF CORNER FREQUENCY = 10kHz ADC MAX11645 SALLEN-KEY FILTER For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maximintegrated.com. 19-5873; Rev 9; 3/15 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps ABSOLUTE MAXIMUM RATINGS IN+, IN-, OUT..................................(VSS - 0.3V) to (VDD + 0.3V) VDD to VSS................................................................-0.3V to +6V SHDN, CAL..............................................................-0.3V to +6V Output to Short-Circuit Ground Duration............................... 10s Continuous Input Current into Any Pin............................. Q20mA Continuous Power Dissipation (TA = +70NC) SC70 (derate 3.1mW/NC above +70NC).......................245mW SOT23 (derate 3.9mW/NC above +70NC)..................312.6mW 6-Pin Thin DFN (Ultra-Thin LGA) (derate 2.1mW/NC above +70NC)..............................110.2mW Operating Temperature Range......................... -40NC to +125NC Junction Temperature......................................................+150NC Lead Temperature (soldering, 10s).................................+300NC Soldering Temperature (reflow).......................................+260NC Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. PACKAGE THERMAL CHARACTERISTICS (Note 1) SC70 Junction-to-Ambient Thermal Resistance (BJA)..... 326.5NC/W Junction-to-Case Thermal Resistance (BJC)..............115NC/W SOT23 Junction-to-Ambient Thermal Resistance (BJA)..... 255.9NC/W Junction-to-Case Thermal Resistance (BJC)................81NC/W Thin DFN (Ultra-Thin LGA) Junction-to-Ambient Thermal Resistance (BJA)........ 470NC/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. ELECTRICAL CHARACTERISTICS (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS VDD + 0.1 V DC CHARACTERISTICS Input Voltage Range VIN+ VIN- Guaranteed by CMRR test -0.1 TA = +25NC Input Offset Voltage (Note 3) Input Offset Voltage Drift (Note 3) VOS VOS - TC TA = -40C to +125C after calibration TA = -40C to +125C IB Common-Mode Rejection Ratio Input Resistance MAX44260/MAX44261 500 MAX44259/MAX44263 MAX44259/MAX44263 1 8 MAX44259/ MAX44260/MAX44261 0.01 0.5 MAX44263 0.01 0.5 TA = -40NC to +85NC 10 MAX44259/ MAX44260/MAX44261 MAX44263 RIN VCM = -0.1V to (VDD + 0.1V) Common mode VCM = -0.1V to (VDD + 0.1V) FV/NC pA 100 160 CIN CMRR FV 800 5 Differential mode Maxim Integrated 100 0.8 TA = -40NC to +125NC Input Capacitance 50 MAX44260/MAX44261 TA = +25NC Input Bias Current (Note 3) 10 75 0.4 pF 90 dB 1011 1012 2 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps ELECTRICAL CHARACTERISTICS (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 2) PARAMETER Open-Loop Gain Output Short-Circuit Current SYMBOL AOL ISC VOL VSS CONDITIONS VDD VOH TYP 0.4V P VOUT P VDD - 0.4V, ROUT = 10kI MAX44259/ MAX44260/MAX44261 100 115 MAX44263 97 115 0.4V P VOUT P VDD - 0.4V, ROUT = 600I MAX44259/ MAX44260/MAX44261 91 100 MAX44263 86 100 0.4V P VOUT P VDD - 0.4V, ROUT = 32I 80 To VDD or VSS 50 ROUT = 10kI UNITS dB mA 50 ROUT = 32I ROUT = 600I MAX 20 ROUT = 600I ROUT = 10kI Output Voltage Swing MIN 400 700 MAX44259/ MAX44260/MAX44261 10 MAX44263 10 MAX44259/ MAX44260/MAX44261 40 MAX44263 50 mV ROUT = 32I 400 800 en f = 10kHz 12.7 nV/Hz in f = 10kHz AC CHARACTERISTICS Input Voltage-Noise Density Input Current-Noise Density Gain-Bandwidth Product Slew Rate 1.2 fA/Hz GBWP 15 MHz SR 7 V/Fs VOUT = 2VP-P, VDD = 3.3V, AV = 1V/V, CL = 30pF (load), settle to 0.01% 1.7 s No sustained oscillation 300 pF f = 10kHz, VO = 2VP-P, AV = 1, ROUT = 10kI -110 dB 1 s Settling Time Capacitive Loading Total Harmonic Distortion CLOAD THD DVOUT = 0.2V, VDD = 3.3V, AV = 1V/V; RS = 20, CL = 1nF (load) Output Transient Recovery Time POWER-SUPPLY CHARACTERISTICS Power-Supply Range Power-Supply Rejection Ratio Maxim Integrated VDD PSRR Guaranteed by PSRR 1.8 5.5 TA = 0NC to +70NC 1.7 5.5 VCM = VDD/2 MAX44259/MAX44260/ MAX44261 82 95 MAX44263 76 95 V dB 3 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps ELECTRICAL CHARACTERISTICS (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 2) PARAMETER SYMBOL Quiescent Current CONDITIONS IDD Shutdown Supply Current MIN TYP MAX MAX44259/MAX44260/MAX44261 750 1200 MAX44263 (per amplifier) 650 1100 UNITS A ISHDN (Note 4) 1 A Shutdown Input Low VIL (Note 4) 0.5 V Shutdown Input High VIH (Note 4) Output Leakage Current in Shutdown ISHDN (Note 4) Shutdown Input Bias Current IIL/IIH Shutdown Turn-On Time (Note 4) tSHDN Turn-On Time (Note 4) 1.3 V 100 pA MAX44260 1 MAX44261 0.1 TA = +25NC (Note 3) 14.4 18.9 TA = -40C to +125C (Note 3) s 26.7 TA = +25NC (Note 3) tON A 9.7 15.2 TA = -40C to +125C (Note 3) ms 18.4 Note 2: All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design. Note 3: Guaranteed by design. Note 4: MAX44259/MAX44260/MAX44261 only. Typical Operating Characteristics (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) TA = -40C 0 -20 TA = +25C -40 -0.5 0 0.5 1.0 1.5 2.0 2.5 COMMON-MODE VOLTAGE (V) Maxim Integrated 3.0 40 20 TA = +25C 0 -20 -40 TA = +125C -60 20 15 10 5 -80 TA = +125C -60 TA = -40C 60 25 PERCENT OCCURRENCE (%) 20 80 MAX44260 toc02 40 INPUT VOS HISTOGRAM 100 INPUT OFFSET VOLTAGE (V) MAX44260 toc01 INPUT OFFSET VOLTAGE (V) 60 INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE MAX44260 toc03 INPUT OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE 3.5 0 -100 1.5 2.0 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) 4.5 5.0 5.5 -15 -10 -5 0 5 10 15 20 25 INPUT OFFSET VOLTAGE (V) 4 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) 10 8 6 4 60 40 TA = +25C 20 0 -20 TA = -40C -40 -60 2 180 TA = +125C -80 -0.5 -1.5 -1 -0.5 0 0.50 1.00 -1.8 -1.3 -0.8 -0.3 0.25 0.75 1.25 INPUT OFFSET DRIFT (V/C) OUTPUT-VOLTAGE LOW vs. OUTPUT SINK CURRENT (VOL - VEE, VCC = 3.3V) 160 140 TA = +25C 120 100 80 TA = +125C 60 40 20 TA = -40C 0.1 1 10 OUTPUT SINK CURRENT (mA) Maxim Integrated 100 1.0 1.5 2.0 2.5 3.0 TA = +125C 60 TA = -40C 40 0.1 OUTPUT-VOLTAGE HIGH vs. OUTPUT SOURCE CURRENT (VCC - VOH, VCC = 1.8V) 100 TA = +125C 60 80 0 3.5 TA = +25C 80 TA = +25C 100 OUTPUT-VOLTAGE LOW vs. OUTPUT SINK CURRENT (VOL - VEE, VCC = 5V) 160 120 120 1 10 OUTPUT SINK CURRENT (mA) 180 140 140 COMMON-MODE VOLTAGE (V) 200 40 20 0 0.5 MAX44260 toc08 180 OUTPUT-VOLTAGE LOW (mV) MAX44260 toc07 200 0 200 180 OUTPUT-VOLTAGE HIGH (mV) -2 160 20 -100 0 OUTPUT-VOLTAGE LOW (mV) TA = +85C 200 MAX44260 toc06 80 100 MAX44260 toc09 12 MAX44260 toc05 14 100 INPUT BIAS CURRENT (pA) MAX44260 toc04 PERCENT OCCURRENCE (%) 16 OUTPUT-VOLTAGE LOW (mV) INPUT OFFSET DRIFT HISTOGRAM 18 OUTPUT-VOLTAGE LOW vs. OUTPUT SINK CURRENT (VOL - VEE, VCC = 1.8V) INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE 160 140 TA = +25C 120 100 80 TA = +125C 60 TA = -40C 40 20 TA = -40C 0 0 0.1 1 10 OUTPUT SINK CURRENT (mA) 100 0.1 1 10 OUTPUT SOURCE CURRENT (mA) 100 5 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) OUTPUT-VOLTAGE HIGH vs. OUTPUT SOURCE CURRENT (VCC - VOH, VCC = 5V) TA = +25C 120 100 80 TA = +125C 60 TA = -40C 40 160 140 TA = +25C 120 100 80 TA = +125C 60 TA = -40C 40 0 0 0.1 0.1 100 1 10 OUTPUT SOURCE CURRENT (mA) 1 10 OUTPUT SOURCE CURRENT (mA) SHUTDOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE (VSHDN = VEE) 0.6 TA = -40C 0.4 TA = +25C 0.3 1.5 100 0.2 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) 0 -20 -40 80 CMRR (dB) 0.7 0.5 TA = -40C 600 100 MAX44260 toc14 TA = +125C 0.8 700 COMMON-MODE REJECTION RATIO vs. FREQUENCY 120 OPEN-LOOP GAIN (dB) 0.9 TA = +125C 750 OPEN-LOOP GAIN vs. FREQUENCY MAX44260 toc13 1.0 TA = +25C 800 650 20 20 SHUTDOWN SUPPLY CURRENT (A) 850 MAX44260 toc15 140 180 SUPPLY CURRENT (A) 160 SUPPLY CURRENT vs. SUPPLY VOLTAGE 900 MAX44260 toc11 OUTPUT-VOLTAGE HIGH (mV) 180 200 OUTPUT-VOLTAGE HIGH (mV) MAX44260 toc10 200 MAX44260 toc12 OUTPUT-VOLTAGE HIGH vs. OUTPUT SOURCE CURRENT (VCC - VOH, VCC = 3.3V) 60 -60 40 -80 20 -100 0.1 0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1 10 100 1k 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FREQUENCY (Hz) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY DC CMRR AND PSRR vs. TEMPERATURE INPUT VOLTAGE-NOISE DENSITY vs. FREQUENCY -40 -60 -80 -94 -96 -98 -100 DC PSRR -100 -120 100 1k 10k 100k FREQUENCY (Hz) Maxim Integrated 1M 10M 100M MAX44260 toc18 DC CMRR 500 INPUT VOLTAGE-NOISE DENSITY (nV/Hz) REJECTION RATIO (dB) -92 MAX44260 toc17 -90 MAX44260 toc16 -20 10 10 10k 100k 1M 10M 100M SUPPLY VOLTAGE (V) 0 PSRR (dB) -120 0 1.5 450 400 350 300 250 200 150 100 50 0 -50 -25 0 25 50 75 TEMPERATURE (C) 100 125 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 6 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) TOTAL HARMONIC DISTORTION vs. INPUT AMPLITUDE (f = 10kHz, VCC = 5.5V, AV = 1V/V) INPUT CURRENT-NOISE DENSITY vs. FREQUENCY MAX44260 toc19 4.5 4.0 110 3.5 3.0 2.5 2.0 105 100 95 1.5 90 1.0 85 0.5 80 0 4s/div 115 THD (dB) 2V/div 120 MAX44260 toc20 INPUT-CURRENT NOISE DENSITY (fA/Hz) 5.0 10 100 1000 10k 0 100k -85 -90 THD (dB) SMALL-SIGNAL TRANSIENT RESPONSE LARGE-SIGNAL TRANSIENT RESPONSE MAX44260 toc23 MAX44260 toc22 -80 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT AMPLITUDE (V) FREQUENCY (Hz) TOTAL HARMONIC DISTORTION vs. FREQUENCY (VIN = 2VP-P) MAX44260 toc21 0.1Hz TO 10Hz OUTPUT-VOLTAGE NOISE INPUT 50mV/div VCC/2 MAX44260 toc24 INPUT 1V/div VCC/2 -95 -100 VCC = 5.5V OUTPUT 500mV/div VCC/2 -105 OUTPUT 50mV/div VCC/2 -110 VCC = 3.3V -115 -120 1 10 100 1k 10k 100k 200ns/div 100ns/div FREQUENCY (Hz) Maxim Integrated 7 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) STABILITY vs. CAPACITIVE LOAD AND ISOLATION RESISTANCE OVERSHOOT (%) 14 12 10 8 6 4 2 0 100 1k 10k STABLE 10k UNSTABLE 1k 100 STABLE 10 UNSTABLE 0 100k 100k MAX44260 toc27 16 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 RESISTIVE LOAD (I) 18 STABILITY vs. CAPACITIVE AND RESISTIVE LOAD MAX44260 toc26 MAX44260 toc25 20 ISOLATION RESISTANCE (I) PERCENT OVERSHOOT vs. LOAD RESISTANCE (VIN = 100mVP-P) 500 1000 1500 2000 2500 3000 3500 4000 1 100 1k CAPACITIVE LOAD (pF) LOAD RESISTANCE (I) MAX44260 toc29 MAX44260 toc28 VCC 2V/div SHDN 2V/div GND VSS OUTPUT 500mV/div VSS GND 4ms/div Maxim Integrated 100k TURN-ON TIME FROM SHUTDOWN POWER-UP TIME OUTPUT 500mV/div 10k CAPACITIVE LOAD (pF) 10s/div 8 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Pin Configurations TOP VIEW NOT TO SCALE + OUT 1 5 + VDD VSS 2 IN+ 3 4 MAX44259 + MAX44260 6 VDD IN+ 1 VSS 2 5 IN- 3 4 IN- MAX44261 6 VDD IN+ 1 SHDN VSS 2 5 CAL OUT IN- 3 4 OUT SC70 SOT23 SC70 TOP VIEW MAX44263 OUTA 1 INA- + 8 VDD 2 7 OUTB INA+ 3 6 INB- VSS 4 5 INB+ VDD SHDN OUT 6 5 4 MAX44260 + SC70 1 2 3 IN+ VSS IN- Thin DFN (Ultra-Thin LGA) Pin Description PIN NAME FUNCTION MAX44259 MAX44260 MAX44261 MAX44263 3 1 1 -- IN+ Positive Input 2 2 2 4 VSS Negative Power Supply. Bypass with a 0.1FF capacitor to ground. 4 3 3 -- IN- Negative Input 1 4 4 -- OUT Output -- -- 5 -- CAL Active-Low Calibrate Input -- 5 -- -- SHDN 5 6 6 8 VDD -- -- -- 1 OUTA -- -- -- 2 INA- Channel A Negative Input -- -- -- 3 INA+ Channel A Positive Input -- -- -- 5 INB+ Channel B Positive Input -- -- -- 6 INB- Channel B Negative Input -- -- -- 7 OUTB Maxim Integrated Active-Low Shutdown Positive Power Supply. Bypass with a 0.1FF capacitor to ground. Channel A Output Channel B Output 9 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Crossover Distortion Detailed Description These op amps feature a low-noise integrated charge pump that creates an internal voltage rail 1V above VDD, which is used to power the input differential pair of PMOS transistors as shown in Figure 1. Such a unique architecture eliminates crossover distortion common in traditional CMOS input architecture (Figure 2), especially when used in a noninverting configuration, such as for Sallen-Key filters. The MAX44259/MAX44260/MAX44261/MAX44263 are high-speed low-power op amps ideal for signal processing applications due to the device's high precision and low-noise CMOS inputs. The devices self-calibrate on power-up to eliminate effects of temperature and powersupply variation. The MAX44260 also features a low-power shutdown mode that greatly reduces quiescent current while the device is not operational and recovers in 30s. The charge pump's operating frequency lies well above the unity-gain frequency of the amplifier. Thanks to its highfrequency operation and ultra-quiet circuitry, the charge pump generates little noise, does not require external components, and is entirely transparent to the user. The MAX44261 features a user-selectable self-calibration input that shuts down the device and allows it to be recalibrated at any time. The calibration routine takes 10ms. INTERNAL CHARGE PUMP MAX44260 INPUTS STRUCTURE STANDARD INPUT STRUCTURE Figure 1. Comparing the Input Structure of the MAX44260 to Standard Op-Amp Inputs AMPLIFIER OUTPUT CROSSOVER DISTORTION MAX44261 TIME Figure 2. Crossover Distortion of Typical Amplifiers Maxim Integrated 10 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Applications Information and retains its power-up trim settings. Figure 3 shows that the device also recovers from shutdown in under 30Fs. Power-Up Autotrim The MAX44261 features a recalibrate input that acts the same as the shutdown mode of the MAX44260. However, when the input is pulled low, the device goes through a self-calibration sequence again (Figure 3). The ICs feature an automatic trim that self-calibrates the VOS of these devices to less than 50FV of input offset voltage on power-up. This self-calibration feature allows the device to eliminate input offset voltage effects due to power supply and operating temperature variation simply by cycling its power. The autotrim sequence takes approximately 10ms to complete and is triggered by an internal power-on-reset (POR) circuitry. During this time, the inputs and outputs are put into high impedance and left unconnected. The MAX44261 can also be forced into a self-calibration cycle by pulling the CAL input low for 1s. This input also puts the part into shutdown mode. The shutdown logic levels of the devices are independent of supply, allowing the shutdown feature of the device to operate off of a 1.8V or 3.3V microcontroller, regardless of supply voltage. Rail-to-Rail Input/Output The input voltage range of the ICs extends 100mV above VDD and below VSS. The wide input commonmode voltage range allows the op amp to be used as a buffer and as a differential amplifier in a wide-variety of signal processing applications. Output voltage high/ low is designed to be only 50mV above VSS and below VDD allowing maximum dynamic range in single-supply applications. The high output current and capacitance drive capability of the devices make them ideal as an ADC driver and a line driver. Shutdown Operation The MAX44260 features an active-low shutdown mode that puts both inputs and outputs into high impedance and substantially lowers the quiescent current to less than 1FA. Putting the output into high impedance allows multiple outputs to be multiplexed onto a single output line without the additional external buffers. The device does not self-calibrate when exiting shutdown mode VDD VSHDN/VCAL 0V VDD/2 FAST RECOVERY AMPLIFIER ACTIVE MAX44260 OUTPUT 0V VDD/2 MAX44261 OUTPUT 0V AUTOTRIM SEQUENCE RECALIBRATED AMPLIFIER ACTIVE 30s 10ms Figure 3. CAL vs. SHDN Input Operation Maxim Integrated 11 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Input Bias Current The ICs feature a high-impedance CMOS input stage and a specialized ESD structure that allows low-input bias current operation at low-input, common-mode voltages. Low-input bias current is useful when interfacing with high-ohmic sensors. It is also beneficial for designing transimpedance amplifiers for photodiode sensors. This makes these devices ideal for ground-referenced medical and industrial sensor applications. Active Filters The MAX44259/MAX44260/MAX44261/MAX44263 are ideal for a wide variety of active filter circuits that make use of their wide bandwidth, rail-to-rail input/output stages and high-impedance CMOS inputs. The Typical Application Circuit shows an example Sallen-Key active filter circuit with a corner frequency of 10kHz. At low frequencies, the amplifier behaves like a simple lowdistortion noninverting buffer, while its high bandwidth gives excellent stopband attenuation above its corner frequency. See the Typical Application Circuit. Driver for Interfacing with the MAX11645 ADC The ICs' tiny size and low noise makes them a good fit for driving 12- to 16-bit resolution ADCs in space-constrained applications. The Typical Application Circuit shows the MAX44260 amplifier output connected to a lowpass filter driving the MAX11645 ADC. The MAX11645 is part of a family of 3V and 5V, 12-bit and 10-bit, 2-channel ADCs. The MAX11645 offers sample rates up to 94ksps and measures two single-ended inputs or one differential input. These ADCs dissipate 670FA at the maximum sampling rate, but just 6FA at 1ksps and 0.5FA in shutdown. Offered in the ultra-tiny, 1.9mm x 2.2mm WLP and FMAX-8 packages, the MAX11645 ADCs are an ideal fit to pair with the MAX44260/MAX44261/MAX44263 amplifiers in portable applications. Where higher resolution is required, refer to the MAX1069 (14-bit) and MAX1169 (16-bit) ADC families. Chip Information PROCESS: BiCMOS Ordering Information PART TEMP RANGE PINPACKAGE TOP MARK MAX44259AUK+ -40NC to +125NC 5 SOT23 +AMFX MAX44260AXT+ -40NC to +125NC 6 SC70 MAX44260AYT+ -40NC to +125NC 6 Thin FDFN (Ultra-Thin LGA) MAX44261AXT+ -40NC to +125NC 6 SC70 +AEC MAX44263AXA+ -40NC to +125NC 8 SC70 +AAG +AEB +AY +Denotes a lead(Pb)-free/RoHS-compliant package. Maxim Integrated 12 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 5 SOT23 U5N+4 21-0057 90-0174 6 SC70 X6SN+1 21-0077 90-0189 6 Thin FDFN (Ultra-Thin LGA) Y61A1+1 21-0190 90-0233 8 SC70 X8CN+1 21-0460 90-0348 Maxim Integrated 13 MAX44259/MAX44260/MAX44261/MAX44263 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Revision History REVISION NUMBER REVISION DATE 0 6/11 Initial release 1 8/11 Added thin DFN (ultra-thin LGA) package and updated slew rate and TOC 29 2 10/11 Removed future product information from data sheet 3 2/12 Revised Electrical Characteristics and the Power-Up Autotrim section 4 7/12 Revised Electrical Characteristics and Typical Operating Characteristics 3, 6 5 10/12 Added the MAX44263 and revised the Electrical Characteristics, Pin Description, and Pin Configuration. 1-17 6 12/12 Revised Typical Operating Characteristics 7 9/14 Added the MAX44259 to data sheet. 8 12/14 Revised General Description and Benefits and Features section 1 9 3/15 Revised Electrical Characteristics 2 DESCRIPTION PAGES CHANGED -- 1, 2, 3, 8, 9, 12 12 2, 3, 11 7 1-14 Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 (c) 2015 Maxim Integrated Products, Inc. 14 The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX44260AXT+T MAX44261AXT+T MAX44260AYT+T MAX44261ASA+T MAX44261ASA+ MAX44263AXA+T MAX44259AUK+ MAX44259AUK+T