FEATURES FUNCTIONAL BLOCK DIAGRAM VPSI ENBL TEMP SENSOR TEMP DET DET TADJ GAIN BIAS VPSO SLOPE DET I V VSET I V VOUT DET CLPF INHI CMIP APPLICATIONS 10783-001 INLO CMOP Figure 1. 2.4 6 2.2 5 2.0 4 GENERAL DESCRIPTION 1.8 3 1.6 2 1.4 1 1.2 0 1.0 -1 0.8 -2 0.6 -3 0.4 -4 The AD8318-EP is a demodulating logarithmic amplifier, capable of accurately converting an RF input signal to a corresponding decibel-scaled output voltage. It employs the progressive compression technique over a cascaded amplifier chain, each stage of which is equipped with a detector cell. The device is used in measurement or controller mode. The AD8318-EP maintains accurate log conformance for signals of 1 MHz to 6 GHz and provides useful operation to 8 GHz. The input range is typically 60 dB (re: 50 ) with error less than 1 dB. The AD8318-EP has a 10 ns response time that enables RF burst detection to beyond 45 MHz. The device provides unprecedented logarithmic intercept stability vs. ambient temperature conditions. A 2 mV/C slope temperature sensor output is also provided for additional system monitoring. A single supply of 5 V is required. Current consumption is typically 68 mA. Power consumption decreases to <1.5 mW when the device is disabled. The AD8318-EP can be configured to provide a control voltage to a VGA, such as a power amplifier or a measurement output, from Pin VOUT. Because the output can be used for controller applications, wideband noise is minimal. In this mode, the setpoint control voltage is applied to VSET. The feedback loop through an RF amplifier is closed via VOUT, the output of which regulates the amplifier output to a magnitude corresponding to VSET. The AD8318-EP provides 0 V to 4.9 V output capability at the VOUT pin, suitable for controller VOUT (V) RF transmitter PA setpoint control and level monitoring RSSI measurement in base stations, WLAN, WiMAX, and radars 0.2 ERROR (dB) Wide bandwidth: 1 MHz to 8 GHz High accuracy: 1.0 dB over 55 dB range (f < 5.8 GHz) Stability over temperature: 0.5 dB Low noise measurement/controller output (VOUT) Pulse response time: 10 ns/12 ns (fall/rise) Integrated temperature sensor Small footprint LFCSP Power-down feature: <1.5 mW at 5 V Single-supply operation: 5 V @ 68 mA Fabricated using high speed SiGe process -5 0 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 PIN (dBm) 0 5 -6 10 10783-052 Enhanced Product 1 MHz to 8 GHz, 70 dB Logarithmic Detector/Controller AD8318-EP Figure 2. Typical Logarithmic Response and Error vs. Input Amplitude at 5.8 GHz applications. As a measurement device, Pin VOUT is externally connected to VSET to produce an output voltage, VOUT, which is a decreasing linear-in-dB function of the RF input signal amplitude. The logarithmic slope is nominally -25 mV/dB but can be adjusted by scaling the feedback voltage from VOUT to the VSET interface. The intercept is 20 dBm (re: 50 , CW input) using the INHI input. These parameters are very stable against supply and temperature variations. The AD8318-EP is fabricated on a SiGe bipolar IC process and is available in a 4 mm x 4 mm, 16-lead LFCSP. Performance is specified over a temperature range of -55oC to +105oC. Additional application and technical information can be found in the AD8318 data sheet. Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 (c)2012 Analog Devices, Inc. All rights reserved. AD8318-EP Enhanced Product TABLE OF CONTENTS Features .............................................................................................. 1 ESD Caution...................................................................................6 Applications ....................................................................................... 1 Pin Configuration and Function Descriptions..............................7 General Description ......................................................................... 1 Typical Performance Characteristics ..............................................8 Functional Block Diagram .............................................................. 1 Outline Dimensions ....................................................................... 11 Revision History ............................................................................... 2 Ordering Guide .......................................................................... 11 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 6 REVISION HISTORY 7/12--Revision 0: Initial Version Rev. 0 | Page 2 of 12 Enhanced Product AD8318-EP SPECIFICATIONS VPOS = 5 V, CLPF = 220 pF, TA = 25C, 52.3 termination resistor at INHI, unless otherwise noted. Table 1. Parameter SIGNAL INPUT INTERFACE Specified Frequency Range DC Common-Mode Voltage MEASUREMENT MODE f = 900 MHz Input Impedance 3 dB Dynamic Range 1 dB Dynamic Range Maximum Input Level Minimum Input Level Slope Intercept Output Voltage--High Power In Output Voltage--Low Power In Temperature Sensitivity f = 1.9 GHz Input Impedance 3 dB Dynamic Range 1 dB Dynamic Range Maximum Input Level Minimum Input Level Slope Intercept Output Voltage--High Power In Output Voltage--Low Power In Temperature Sensitivity f = 2.2 GHz Input Impedance 3 dB Dynamic Range 1 dB Dynamic Range Maximum Input Level Minimum Input Level Slope Intercept Output Voltage--High Power In Output Voltage--Low Power In Temperature Sensitivity Test Conditions/Comments INHI (Pin 14) and INLO (Pin 15) Min Typ Max Unit 8 VPOS - 1.8 GHz V 957||0.71 65 63 57 -1 -58 -24.5 22 0.78 1.52 ||pF dB dB dB dBm dBm mV/dB dBm V V 0.001 VOUT (Pin 6) shorted to VSET (Pin 7), sinusoidal input signal RTADJ = 500 TA = 25C -55C < TA < +105C TA = 25C 1 dB error 1 dB error PIN = -10 dBm PIN = -40 dBm PIN = -10 dBm 25C TA 105C -55C TA +25C RTADJ = 500 -26 19.5 0.7 1.42 TA = 25C -55C < TA < +105C TA = 25C 1 dB error 1 dB error PIN = -10 dBm PIN = -35 dBm PIN = -10 dBm 25C TA 105C -55C TA +25C RTADJ = 500 -27 17 0.63 1.2 TA = 25C -55C < TA < +105C TA = 25C 1 dB error 1 dB error PIN = -10 dBm PIN = -35 dBm PIN = -10 dBm 25C TA 105C -55C TA +25C Rev. 0 | Page 3 of 12 -28 15 0.63 1.2 -23 24 0.86 1.62 0.0071 0.0031 dB/C dB/C 523||0.68 65 63 57 -2 -59 -24.4 20.4 0.73 1.35 ||pF dB dB dB dBm dBm mV/dB dBm V V -22 24 0.83 1.5 0.0056 0.0004 dB/C dB/C 391||0.66 65 62 58 -2 -60 -24.4 19.6 0.73 1.34 ||pF dB dB dB dBm dBm mV/dB dBm V V 0.0052 0.0034 -21.5 25 0.84 1.5 dB/C dB/C AD8318-EP Parameter f = 3.6 GHz Input Impedance 3 dB Dynamic Range 1 dB Dynamic Range Maximum Input Level Minimum Input Level Slope Intercept Output Voltage--High Power In Output Voltage--Low Power In Temperature Sensitivity f = 5.8 GHz Input Impedance 3 dB Dynamic Range 1 dB Dynamic Range Maximum Input Level Minimum Input Level Slope Intercept Output Voltage--High Power In Output Voltage--Low Power In Temperature Sensitivity f = 8.0 GHz 3 dB Dynamic Range Maximum Input Level Minimum Input Level Slope Intercept Output Voltage--High Power In Output Voltage--Low Power In Temperature Sensitivity OUTPUT INTERFACE Voltage Swing Output Current Drive Small Signal Bandwidth Video Bandwidth (or Envelope Bandwidth) Output Noise Fall Time Rise Time Enhanced Product Test Conditions/Comments RTADJ = 51 TA = 25C -55C < TA < +105C TA = 25C 1 dB error 1 dB error PIN = -10 dBm PIN = -40 dBm PIN = -10 dBm 25C TA 105C -55C TA +25C RTADJ = 1000 TA = 25C -55C < TA < +105C TA = 25C 1 dB error 1 dB error PIN = -10 dBm PIN = -40 dBm PIN = -10 dBm 25C TA 105C -55C TA +25C RTADJ = 500 TA = 25C -55C < TA < +105C 3 dB error 3 dB error PIN = -10 dBm PIN = -40 dBm PIN = -10 dBm 25C TA 105C -55C TA +25C VOUT (Pin 6) VSET = 0 V; PIN = -10 dBm, no load 1 VSET = 2.1 V; PIN = -10 dBm, no load1 VSET = 1.5 V; PIN = -50 dBm PIN = -10 dBm; from CLPF to VOUT PIN = 2.2 GHz; -10 dBm, fNOISE = 100 kHz, CLPF = 220 pF PIN = Off to -10 dBm, 90% to 10% PIN = -10 dBm to off, 10% to 90% Rev. 0 | Page 4 of 12 Min Typ Max Unit 119||0.7 70 61 58 -2 -60 -24.3 19.8 0.717 1.46 ||pF dB dB dB dBm dBm mV/dB dBm V V 0.0012 0.009 dB/C dB/C 33||0.59 70 62 57 ||pF dB dB dB -1 -58 -24.3 25 0.86 1.59 dBm dBm mV/dB dBm V V 0.019 0.0096 dB/C dB/C 60 58 3 -55 -23 37 1.06 1.78 dB dB dBm dBm mV/dB dBm V V 0.032 0.0078 dB/C dB/C 4.9 25 60 60 45 90 10 12 V mV mA MHz MHz nV/Hz ns ns Enhanced Product Parameter VSET INTERFACE Nominal Input Range Logarithmic Scale Factor Bias Current Source TEMPERATURE REFERENCE Output Voltage Temperature Slope Current Source/Sink POWER-DOWN INTERFACE Logic Level to Enable Device ENBL Current When Enabled ENBL Current When Disabled POWER INTERFACE Supply Voltage Quiescent Current vs. Temperature Supply Current when Disabled vs. Temperature 1 2 AD8318-EP Test Conditions/Comments VSET (Pin 7) PIN = 0 dBm; measurement mode 2 PIN = -65 dBm; measurement mode2 PIN = -10 dBm; VSET = 2.1 V TEMP (Pin 13) TA = 25C, RLOAD = 10 k -55C TA +105C, RLOAD = 10 k TA = 25C ENBL (Pin 16) Min Controller mode. Gain = 1. For other gains, see the AD8318 data sheet. Rev. 0 | Page 5 of 12 Max 0.5 2.1 -0.04 2.5 0.57 0.6 2 10/0.1 4.5 50 5 68 150 260 350 Unit V dB/mV A 0.63 1.7 <1 15 ENBL = 5 V ENBL = 0 V; sourcing VPSI (Pin 3 and Pin 4), VPSO (Pin 9) ENBL = 5 V -55C TA +105C ENBL = 0 V, total currents for VPSI and VPSO -55C TA +105C Typ V mV/C mA V A A 5.5 82 V mA A/C A A AD8318-EP Enhanced Product ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage: Pin VPSO, Pin VPSI ENBL, VSET Voltage Input Power (Single-Ended, re: 50 ) Internal Power Dissipation JA 1 Maximum Junction Temperature Operating Temperature Range Storage Temperature Range 1 Rating 5.7 V 0 to VPOS 12 dBm 0.73 W 55C/W 130C -55C to +105C -65C to +150C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ESD CAUTION With package die paddle soldered to thermal pads with vias connecting to inner and bottom layers. Rev. 0 | Page 6 of 12 Enhanced Product AD8318-EP PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 12 11 10 9 CMIP CMIP TADJ VPSO 13 TEMP 14 INHI 15 INLO CMOP 8 VSET 7 AD8318-EP ENBL CLPF 5 CMIP CMIP 1 2 VPSI VPSI 3 4 NOTES 1. THE EXPOSED PADDLE IS INTERNALLY CONNECTED TO CMIP (SOLDER TO GROUND). 10783-002 16 VOUT 6 Figure 3. Pin Configuration Table 3. Pin Function Descriptions Pin No. 1, 2, 11, 12 3, 4 5 6 7 8 9 10 13 14 15 16 Mnemonic CMIP VPSI CLPF VOUT VSET CMOP VPSO TADJ TEMP INHI INLO ENBL Paddle Description Device Common (Input System Ground). Positive Supply Voltage (Input System): 4.5 V to 5.5 V. Voltage on Pin 3, Pin 4, and Pin 9 should be equal. Loop Filter Capacitor. Measurement and Controller Output. Setpoint Input for Controller Mode or Feedback Input for Measurement Mode. Device Common (Output System Ground). Positive Supply Voltage (Output System): 4.5 V to 5.5 V. Voltage on Pin 3, Pin 4, and Pin 9 should be equal. Temperature Compensation Adjustment. Temperature Sensor Output. RF Input. Nominal input range: -60 dBm to 0 dBm (re: 50 ), ac-coupled. RF Common for INHI. AC-coupled RF common. Device Enable. Connect to VPSI for normal operation. Connect pin to ground for disable mode. The Exposed Paddle is Internally Connected to CMIP (Solder to Ground). Rev. 0 | Page 7 of 12 AD8318-EP Enhanced Product TYPICAL PERFORMANCE CHARACTERISTICS 2.4 6 5 2.2 5 2.0 4 2.0 4 1.8 3 1.8 3 1.6 2 1.6 2 1.4 1 1.4 1 1.2 0 1.2 0 1.0 -1 1.0 -1 0.8 -2 0.8 -2 0.6 -3 0.6 -3 0.4 -4 0.4 -4 0.2 -5 0.2 -5 -25 -15 -5 5 15 PIN (dBm) -35 -25 -15 -5 5 15 VOUT (V) Figure 7. VOUT and Log Conformance vs. Input Amplitude at 3.6 GHz, Typical Device, RTADJ = 51 6 2.4 6 2.2 5 2.2 5 2.0 4 2.0 4 1.8 3 1.8 3 1.6 2 1.6 2 1.4 1 1.4 1 1.2 0 1.2 0 1.0 -1 1.0 -1 0.8 -2 0.8 -2 0.6 -3 0.6 -3 0.4 -4 0.4 -4 0.2 -5 0.2 -5 0 -65 -6 -55 -45 -35 -25 -15 -5 5 VOUT (V) ERROR (dB) 2.4 0 -65 10783-005 VOUT (V) -45 PIN (dBm) Figure 4. VOUT and Log Conformance vs. Input Amplitude at 900 MHz, Typical Device 15 PIN (dBm) -6 -55 -45 -35 -25 -15 -5 5 15 PIN (dBm) Figure 5. VOUT and Log Conformance vs. Input Amplitude at 1.9 GHz, Typical Device Figure 8. VOUT and Log Conformance vs. Input Amplitude at 5.8 GHz, Typical Device, RTADJ = 1000 6 2.4 6 2.2 5 2.2 5 2.0 4 2.0 4 1.8 3 1.8 3 1.6 2 1.6 2 1.4 1 1.4 1 1.2 0 1.2 0 1.0 -1 1.0 -1 0.8 -2 0.8 -2 0.6 -3 0.6 -3 0.4 -4 0.4 -4 0.2 -5 0.2 -5 0 -65 -6 -55 -45 -35 -25 -15 -5 5 15 PIN (dBm) VOUT (V) ERROR (dB) 2.4 10783-006 VOUT (V) -6 -55 10783-007 -35 ERROR (dB) -45 10783-008 -55 0 -65 Figure 6. VOUT and Log Conformance vs. Input Amplitude at 2.2 GHz, Typical Device 0 -65 ERROR (dB) -6 -6 -55 -45 -35 -25 -15 -5 5 15 PIN (dBm) Figure 9. VOUT and Log Conformance vs. Input Amplitude at 8 GHz, Typical Device Rev. 0 | Page 8 of 12 10783-009 0 -65 ERROR (dB) 6 2.2 ERROR (dB) 2.4 10783-004 VOUT (V) VPOS = 5 V; TA = +25C, -55C, +105C; CLPF = 220 pF; RTADJ = 500 ; unless otherwise noted. Colors: +25C Black; -55C Blue; +105C Red. Enhanced Product AD8318-EP 6 5 5 4 4 3 3 2 2 -1 -2 -3 -3 -4 -4 -5 -5 -55 -45 -35 -25 -15 -5 5 15 PIN (dBm) Figure 10. Distribution of Error over Temperature After Ambient Normalization vs. Input Amplitude at 900 MHz for at Least 70 Devices -6 -65 5 4 4 3 3 2 2 ERROR (dB) 6 5 0 -1 -3 -4 -4 -5 -5 -35 -25 -15 -5 5 15 PIN (dBm) Figure 11. Distribution of Error at Temperature After Ambient Normalization vs. Input Amplitude at 1900 MHz for at Least 70 Devices -6 -65 5 4 4 3 3 2 2 ERROR (dB) 6 -1 -3 -4 -4 -5 -5 -25 PIN (dBm) -15 -5 5 15 -6 -65 10783-012 -35 -45 -35 -25 -15 -5 5 15 0 -2 -45 -55 -1 -3 -55 15 1 -2 -6 -65 5 Figure 14. Distribution of Error at Temperature After Ambient Normalization vs. Input Amplitude at 5.8 GHz for at Least 70 Devices, RTADJ = 1000 5 0 -5 PIN (dBm) 6 1 -15 0 -2 -45 -25 -1 -3 -55 -35 1 -2 -6 -65 -45 Figure 13. Distribution of Error at Temperature After Ambient Normalization vs. Input Amplitude at 3.6 GHz for at Least 70 Devices, RTADJ = 51 6 1 -55 PIN (dBm) 10783-011 ERROR (dB) 0 -1 -2 -6 -65 ERROR (dB) 1 10783-014 0 -55 -45 -35 -25 PIN (dBm) Figure 12. Distribution of Error at Temperature After Ambient Normalization vs. Input Amplitude at 2.2 GHz for at Least 70 Devices -15 -5 5 15 10783-115 1 10783-013 ERROR (dB) 6 10783-010 ERROR (dB) VPOS = 5 V; TA = +25C, -55C, +105C; CLPF = 220 pF; RTADJ = 500 ; unless otherwise noted. Colors: +25C Black; -55C Blue; +105C Red. Figure 15. Distribution of Error at Temperature After Ambient Normalization vs. Input Amplitude at 8 GHz for at Least 70 Devices Rev. 0 | Page 9 of 12 AD8318-EP Enhanced Product VPOS = 5 V; TA = +25C, -55C, +105C; CLPF = 220 pF; RTADJ = 500 ; unless otherwise noted. Colors: +25C Black; -55C Blue; +105C Red. j1 j2 j0.5 10k NOISE SPECTRAL DENSITY (nV/ Hz) RF OFF j0.2 0.2 0.5 1 2 0.1GHz 8GHz 5.8GHz 0.9GHz -j0.2 1.9GHz 3.6GHz 2.2GHz -j0.5 1k -40dBm -20dBm 100 -10dBm 0dBm 10783-015 -j2 START FREQUENCY = 0.1GHz STOP FREQUENCY = 8GHz -j1 10 1 3 10 30 100 300 1k 3k 10k FREQUENCY (kHz) Figure 19. Noise Spectral Density of Output; CLPF = Open Figure 16. Input Impedance vs. Frequency; No Termination Resistor on INHI, ZO = 50 0.07 1k 0.05 INCREASING VENBL 0.03 0.02 0.01 1.5 1.6 1.7 1.8 VENBL (V) 10 10783-016 0 1.4 100 1 3 10 100 300 1k 3k 10k Figure 20. Noise Spectral Density of Output Buffer (from CLPF to VOUT); CLPF = 0.1 F Figure 17. Supply Current vs. Enable Voltage 2.2 VOUT VOUT (V) 200mV/VERTICAL DIVISION PULSED RF INPUT 0.1GHz, -10dBm GND 1.6 1.8 1.2 1.6 0.8 1.4 0.4 1.2 0 1.0 -0.4 0.8 -0.8 0.6 -1.2 0.4 -1.6 0.2 -65 10783-017 2.0 +25C -40C +85C 2.0 20ns PER HORIZONTAL DIVISION 30 FREQUENCY (kHz) -55 -45 -35 -25 -15 -5 5 -2.0 15 PIN (dBm) Figure 18. VOUT Pulse Response Time; Pulsed RF Input 0.1 GHz, -10 dBm; CLPF = Open Rev. 0 | Page 10 of 12 Figure 21. Output Voltage Stability vs. Supply Voltage at 1.9 GHz When VP Varies by 10%, Multiple Devices ERROR (dB) DECREASING V ENBL 10783-020 0.04 10783-019 NOISE SPECTRAL DENSITY (nV/ Hz) 0.06 SUPPLY CURRENT (A) -60dBm 10783-018 0 Enhanced Product AD8318-EP OUTLINE DIMENSIONS PIN 1 INDICATOR 0.35 0.30 0.25 0.65 BSC PIN 1 INDICATOR 16 13 1 12 EXPOSED PAD 2.25 2.10 SQ 1.95 9 TOP VIEW 0.80 0.75 0.70 0.70 0.60 0.50 4 8 0.25 MIN BOTTOM VIEW 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.20 REF SEATING PLANE 5 FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. COMPLIANT TO JEDEC STANDARDS MO-220-WGGC. 111908-A 4.10 4.00 SQ 3.90 Figure 22. 16-Lead Lead Frame Chip Scale Package [LFCSP_WQ] 4 mm x 4 mm Body, Very Very Thin Quad (CP-16-23) Dimensions shown in millimeters ORDERING GUIDE Model 1, 2 AD8318SCPZ-EP-RL7 AD8318SCPZ-EP-R2 AD8318SCPZ-EP-WP AD8318-EP-EVALZ 1 2 Temperature Range -55C to +105C -55C to +105C -55C to +105C Package Description 16-Lead Lead Frame Chip Scale Package [LFCSP_WQ] 16-Lead Lead Frame Chip Scale Package [LFCSP_WQ] 16-Lead Lead Frame Chip Scale Package [LFCSP_WQ] Evaluation Board Z = RoHS Compliant Part. WP = waffle pack. Rev. 0 | Page 11 of 12 Package Option CP-16-23 CP-16-23 CP-16-23 Ordering Quantity 1,500 250 64 AD8318-EP Enhanced Product NOTES (c)2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D10783-0-7/12(0) Rev. 0 | Page 12 of 12