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| Dual, Low Power, Wideband, Low Noise, Rail-to-Rail Output, Operational Amplifiers ADA4691-2/ADA4692-2 FEATURES Low power: 200 A typical, 250 A maximum Low distortion: 0.003% THD + N Low noise: 16 nV/Hz typical 3.9 MHz bandwidth Slew rate: 1.4 V/s typical Offset voltage: 500 V typical Low offset voltage drift: 4 V/C maximum Very low input bias currents: 0.5 pA typical 2.7 V to 5 V single supply or 1.35 V to 2.5 V dual supply PIN CONFIGURATIONS OUT A 1 -IN 2 +IN 3 V- 4 8 V+ OUT B +IN B 07950-001 07950-002 ADA4692-2 TOP VIEW (Not to Scale) 7 6 5 -IN B Figure 1. 8-Lead SOIC_N (R-8) 10 OUT A APPLICATIONS Portable audio: MP3, PDA, smart phone, notebook Portable instrumentation Portable medical devices Photodiode amplifiers Sensor amplifiers Low-side current sense ADC drivers Active filters Sample-and-hold Automotive sensors -IN A 1 +IN A 2 V- 3 9 V+ ADA4691-2 TOP VIEW (Not to Scale) 8 OUT B 7 -IN B 6 +IN B SD A 4 Figure 2. 10-Lead LFCSP (CP-10-11) GENERAL DESCRIPTION The ADA4691-2 and ADA4692-2 are dual, rail-to-rail output, single-supply amplifiers featuring low power, wide bandwidth, and low noise. The ADA4691-2 has two independent shutdown pins, allowing further reduction in supply current. These amplifiers are ideal for a wide variety of applications. Audio preamps, filters, IR/photodiode amplifiers, charge amps, and high impedance sensors all benefit from this combination of performance features. Applications for these amplifiers include consumer audio personal players with low noise and low distortion that provide enough gain and slew rate response over the audio band at low power. Industrial applications with high impedance sensors, such as pyroelectric sensors and other IR sensors, benefit from the high impedance input, low offset drift, and enough bandwidth and response for low gain applications. The ADA4691-2 and ADA4692-2 are specified over the extended industrial temperature range (-40C to +125C). The ADA4691-2 is available in a 10-lead LFCSP package, and the ADA4692-2 is available in an 8-lead SOIC package. Rev. A 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)2009 Analog Devices, Inc. All rights reserved. SD B 5 ADA4691-2/ADA4692-2 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Pin Configurations ........................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics--2.7 V Operation ............................ 3 Electrical Characteristics--5 V Operation................................ 4 Absolute Maximum Ratings............................................................ 6 Thermal Resistance .......................................................................6 ESD Caution...................................................................................6 Typical Performance Characteristics ..............................................7 Shutdown Operation ...................................................................... 15 Input Pin Characteristics ........................................................... 15 Input Threshold .......................................................................... 15 Outline Dimensions ....................................................................... 16 Ordering Guide .......................................................................... 16 REVISION HISTORY ADA4691-2/ADA4692-2 Revision History 6/09--Rev. 0 to Rev. A Added ADA4691-2 Information Throughout .............................. 1 Added Figure 2, Renumbered Subsequent Figures ...................... 1 Changes to Table 1 ............................................................................ 3 Changes to Table 2 ............................................................................ 4 Changes to Table 4 ............................................................................ 6 Changes to Captions for Figure 40, Figure 41, Figure 43, Figure 44 .......................................................................................... 13 Added Shutdown Operations Section ......................................... 15 Updated Outline Dimensions ....................................................... 16 Changes to Ordering Guide .......................................................... 16 ADA4692-2 Revision History 3/09--Revision 0: Initial Version Rev. A | Page 2 of 16 ADA4691-2/ADA4692-2 SPECIFICATIONS ELECTRICAL CHARACTERISTICS--2.7 V OPERATION VSY = 2.7 V, VCM = VSY/2, TA = 25C, unless otherwise specified. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current ADA4691 ADA4692 Input Offset Current Input Voltage Range Common-Mode Rejection Ratio ADA4691 ADA4692 Large Signal Voltage Gain ADA4691 ADA4692 ADA4691 ADA4692 Offset Voltage Drift Input Capacitance Differential Mode Common Mode Logic High Voltage (Enabled) Logic Low Voltage (Power-Down) Logic Input Current (Per Pin) OUTPUT CHARACTERISTICS Output Voltage High Symbol VOS IB -40C < TA < +125C -40C < TA < +125C IOS -40C < TA < +125C -40C < TA < +125C VCM = -0.3 V to +1.6 V VCM = -0.1 V to +1.6 V; -40C < TA < +125C VCM = -0.1 V to +1.6 V; -40C < TA < +125C RL = 2 k, VOUT = 0.5 V to 2.2 V -40C < TA < +85C -40C < TA < +85C -40C < TA < +125C -40C < TA < +125C RL = 600 , VOUT = 0.5 V to 2.2 V -40C < TA < +125C -0.3 70 62 70 90 80 85 67 73 85 1 Test Conditions/Comments VCM = -0.3 V to +1.6 V VCM = -0.1 V to +1.6 V; -40C < TA < +125C Min Typ 0.5 0.5 Max 2.5 3.5 5 350 325 5 225 +1.6 Unit mV mV pA pA pA pA pA V dB dB dB dB dB dB 95 0.8 2.5 7 -40C < TA < +125C -40C < TA < +125C -40C < TA < +125C, 0 V VSD 2.7 V RL = 2 k to GND -40C < TA < +125C RL = 600 to GND -40C < TA < +125C RL = 2 k to VSY -40C < TA < +125C RL = 600 to VSY -40C < TA < +125C VOUT = VSY or GND f = 1 MHz, AV = -100 -40C < TA < +125C, shutdown active, VSD = VSS VS = 2.7 V to 5.5 V -40C < TA < +125C VOUT = VSY/2 -40C < TA < +125C -40C < TA < +125C All amplifiers shut down, VShutDown = VSS -40C < TA < +125C +1.6 0.5 1 2.65 2.6 2.55 2.5 2.67 2.59 24 78 15 372 1 80 75 90 165 200 240 225 2 30 40 95 125 dB V/C pF pF V V A V V V V mV mV mV mV mA nA dB dB A A A nA A CMRR 90 AVO 100 VOS/T CIN CINDM CINCM VIH VIL IIN VOH 3 Output Voltage Low VOL Short-Circuit Current Closed-Loop Output Impedance Output Pin Leakage Current POWER SUPPLY Power Supply Rejection Ratio Supply Current Per Amplifier ADA4691-2 ADA4692-2 Supply Current Shutdown Mode ISC ZOUT PSRR ISY ISD 10 Rev. A | Page 3 of 16 ADA4691-2/ADA4692-2 Parameter DYNAMIC PERFORMANCE Slew Rate Slew Rate Settling Time to 0.1% Gain Bandwidth Product ADA4691 Gain Bandwidth Product ADA4692 Phase Margin Turn-on, Turn-off time NOISE PERFORMANCE Distortion Symbol SR SR tS GBP GBP M Test Conditions/Comments RL = 600 , CL = 20 pF, AV = +1 RL = 2 k, CL = 20 pF, AV = +1 Step = 0.5 V, RL = 2 k, 600 RL = 1 M, CL = 35 pF, AV = +1 RL = 1 M, CL = 35 pF, AV = +1 RL = 1 M, CL = 35 pF, AV = +1 RL = 600 AV = -1, RL = 2 k, f = 1 kHz, VIN rms = 0.15 V rms AV = -1, RL = 600 , f = 1 kHz, VIN rms = 0.15 V rms AV = +1, RL = 2 k, f = 1 kHz, VIN rms = 0.15 V rms AV = +1, RL = 600 , f = 1 kHz, VIN rms = 0.15 V rms f = 0.1 Hz to 10 Hz f = 1 kHz f = 10 kHz Min Typ 1.1 1.4 1 3.6 3.9 49 1 0.009 0.01 0.006 0.007 3.1 16 13 Max Unit V/s V/s s MHz MHz Degrees s % % % % V p-p nV/Hz nV/Hz THD + N Voltage Noise Voltage Noise Density en p-p en ELECTRICAL CHARACTERISTICS--5 V OPERATION VSY = 5 V, VCM = VSY/2, TA = 25C, unless otherwise specified. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio ADA4691-2 ADA4629-2 Large Signal Voltage Gain ADA4691-2 ADA4692-2 ADA4691-2 ADA4692-2 ADA4691-2 and ADA46920-2 Offset Voltage Drift Input Capacitance Differential Mode Common Mode Logic High Voltage (Enabled) Logic Low Voltage (Power-Down) Logic Input Current (Per Pin) OUTPUT CHARACTERISTICS Output Voltage High Symbol VOS IB -40C < TA < +125C IOS -40C < TA < +125C -40C < TA < +125C VCM = -0.3 V to +3.9 V VCM = -0.1 V to +3.9 V; -40C < TA < +125C VCM = -0.1 V to +3.9 V; -40C < TA < +125C RL = 2 k, VO = 0.5 V to 4.5 V, VCM = 0 V -40C < TA < +85C -40C < TA < +85C -40C < TA < +125C -40C < TA < +125C RL = 600 , VO = 0.5 V to 4.5 V, VCM = 0 V -40C < TA < +125C -0.3 75 68 75 95 80 90 75 80 90 1 Test Conditions/Comments VCM = -0.3 V to +3.9 V VCM = -0.1 V to +3.9 V; -40C < TA < +125C Min Typ 0.5 0.5 Max 2.5 3.5 5 360 5 260 +3.9 Unit mV mV pA pA pA pA V dB dB dB dB dB dB dB dB dB V/C pF pF V V A V V V CMRR 98 AVO 110 VOS/T CINDM CINCM VIH VIL IIN VOH 100 1 2.5 7 4 -40C < TA < +125C -40C < TA < +125C -40C < TA < +125C, 0 V VSD 2.7 V RL = 2 k -40C TA +125C RL = 600 to GND Rev. A | Page 4 of 16 +2.0 0.8 1 4.95 4.90 4.85 4.97 4.88 ADA4691-2/ADA4692-2 Parameter Output Voltage Low Symbol VOL Test Conditions/Comments -40C TA +125C RL = 2 k -40C TA +125C RL = 600 -40C TA +125C VOUT = VSY or GND ADA4691-2, f = 1 MHz, AV = -100 ADA4691-2, f = 1 MHz, AV = -100 -40C < TA < +125C, shutdown active, VSD = VSS VSY = 2.7 V to 5.5 V -40C TA +125C VOUT = VSY/2 -40C TA +125C -40C TA +125C All amplifiers shutdown, VShutDown = VSS -40C TA +125C RL = 2 k, 600 , CL = 20 pF, AV = +1 VIN = 2 V step, RL = 2 k or 600 RL = 1 M, CL = 35 pF, AV = +1 RL = 1 M, CL = 35 pF, AV = +1 RL = 600 AV = -1, RL = 2 k, f = 1 kHz, VIN rms = 0.8 V rms AV = -1, RL = 600 , f = 1 kHz, VIN rms = 0.8 V rms AV = +1, RL = 2 k, f = 1 kHz, VIN rms = 0.8 V rms AV = +1, RL = 600 , f = 1 kHz, VIN rms = 0.8 V rms f = 0.1 Hz to 10 Hz f = 1 kHz f = 10 kHz Min 4.80 Typ 28 90 55 364 246 1 80 75 90 180 225 275 250 2 1.3 1.5 3.6 52 1 0.008 0.006 0.003 0.001 3.2 16 13 Max 35 45 110 140 Unit V mV mV mV mV mA nA dB dB A A A nA uA Short-Circuit Limit Closed-Loop Output Impedance Closed-Loop Output Impedance Output Pin Leakage Current POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier ADA4691-2 ADA4692-2 Supply Current Shutdown Mode DYNAMIC PERFORMANCE Slew Rate Settling Time to 0.1% Gain Bandwidth Product Phase Margin Turn-on, Turn-off time NOISE PERFORMANCE Distortion ISC ZOUT ZOUT PSRR ISY ISD 10 SR tS GBP M V/s s MHz Degrees s % % % % V p-p nV/Hz nV/Hz THD + N Voltage Noise Voltage Noise Density en p-p en en Rev. A | Page 5 of 16 ADA4691-2/ADA4692-2 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Supply Voltage Input Voltage Input Current1 Shutdown Pin Rise/Fall times Differential Input Voltage2 Output Short-Circuit Duration to GND Temperature Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) 1 THERMAL RESISTANCE Rating 6V VSS - 0.3 V to VDD +0.3 V 10 mA 50 s maximum VSY Indefinite -65C to +150C -40C to +125C -65C to +150C 300C JA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages and measured using a standard 4-layer board, unless otherwise specified. Table 4. Thermal Resistance Package Type 8-Lead SOIC_N (R-8) 10-Lead LFCSP (CP-10-11) JA 155 88 JC 45 32 Unit C/W C/W ESD CAUTION Input pins have clamp diodes to the supply pins. Limit the input current to 10 mA or less whenever the input signal exceeds the power supply rail by 0.3 V. 2 Differential input voltage is limited to 5 V or the supply voltage, whichever is less. 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. Rev. A | Page 6 of 16 ADA4691-2/ADA4692-2 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25C, unless otherwise noted. 350 ADA4692-2 VSY = 2.7V TA = 25C 300 -0.3V VCM +1.6V SIGNIFIES CENTER OF BIN 250 200 150 100 50 700 ADA4692-2 VSY = 5V TA = 25C 600 -0.3V VCM +3.9V SIGNIFIES CENTER OF BIN 500 400 300 200 100 0 -2.0 -1.6 -1.2 -0.8 -0.4 NUMBER OF AMPLIFIERS 07950-003 NUMBER OF AMPLIFIERS 0 0.4 0.8 1.2 1.6 2.0 VOS (mV) Figure 3. Input Offset Voltage Distribution 30 30 Figure 6. Input Offset Voltage Distribution 25 NUMBER OF AMPLIFIERS NUMBER OF AMPLIFIERS ADA4692-2 VSY = 1.35V -40C < TA < +125C SIGNIFIES CENTER OF BIN 25 ADA4692-2 VSY = 2.5V -40C < TA < +125C SIGNIFIES CENTER OF BIN 20 20 15 15 10 10 5 5 07950-004 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 TCVOS (V/C) TCVOS (V/C) Figure 4. Input Offset Voltage Drift Distribution 2.0 1.5 1.0 0.5 2.0 1.5 1.0 0.5 Figure 7. Input Offset Voltage Drift Distribution ADA4692-2 VSY = 2.7V TA = 25C ADA4692-2 VSY = 5V TA = 25C VOS (mV) 0 -0.5 -1.0 -1.5 -2.0 -0.5 VOS (mV) 0 -0.5 -1.0 -1.5 -2.0 -0.5 07950-005 0 0.5 1.0 VCM (V) 1.5 2.0 2.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCM (V) Figure 5. Input Offset Voltage vs. Common-Mode Voltage Figure 8. Input Offset Voltage vs. Common-Mode Voltage Rev. A | Page 7 of 16 07950-008 07950-007 0 0 07950-006 ADA4691-2/ADA4692-2 1k ADA4692-2 VSY = 1.35V TA = 25C AVERAGE 20 CHANNELS 1k ADA4692-2 VSY = 2.5V TA = 25C AVERAGE 20 CHANNELS 100 100 10 IB (pA) 10 IB (pA) 1 1 0.1 0.1 07950-009 35 45 55 65 75 85 95 105 115 125 35 45 55 65 75 85 95 105 115 125 TEMPERATURE (C) TEMPERATURE (C) Figure 9. Input Bias Current vs. Temperature 1k TA = 125C 100 1k Figure 12. Input Bias Current vs. Temperature TA = 125C 100 ADA4692-2 VSY = 5V AVERAGE 20 CHANNELS 10 IB (pA) TA = 85C IB (pA) 10 TA = 85C 1 1 TA = 25C 0.1 0.01 0.1 ADA4692-2 VSY = 2.7V AVERAGE 20 CHANNELS 07950-010 TA = 25C 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 0 0.5 1.0 1.5 2.0 2.5 VCM (V) 3.0 3.5 4.0 4.5 5.0 VCM (V) Figure 10. Input Bias Current vs. Common-Mode Voltage 10k OUTPUT SATURATION VOLTAGE (mV) Figure 13. Input Bias Current vs. Common-Mode Voltage 10k OUTPUT SATURATION VOLTAGE (mV) 1k ADA4692-2 VSY = 1.35V VOH = (V+) - VOUT (SOURCING) 1k TA = +125C ADA4692-2 VSY = 2.5V VOH = (V+) - VOUT (SOURCING) TA = +125C 100 TA = +85C 10 TA = +25C TA = -40C 100 TA = +85C 10 TA = +25C 1 TA = -40C 1 0.1 0.1 07950-011 0.01 0.1 ILOAD (mA) 1 10 100 0.01 0.1 ILOAD (mA) 1 10 100 Figure 11. Output Voltage (VOH) to Supply Rail vs. Load Current Figure 14. Output Voltage (VOH) to Supply Rail vs. Load Current Rev. A | Page 8 of 16 07950-014 0.01 0.001 0.01 0.001 07950-013 0.001 0.01 07950-012 0.01 25 0.01 25 ADA4691-2/ADA4692-2 10k OUTPUT SATURATION VOLTAGE (mV) OUTPUT SATURATION VOLTAGE (mV) 1k ADA4692-2 VSY = 1.35V VOL = VOUT - (V-) (SINKING) 10k 1k TA = +125C ADA4692-2 VSY = 2.5V VOL = VOUT - (V-) (SINKING) TA = +125C 100 TA = +85C 10 TA = +25C 100 TA = +85C 10 TA = +25C 1 TA = -40C 1 TA = -40C 0.1 0.1 0.01 0.1 ILOAD (mA) 1 10 100 0.01 0.1 ILOAD (mA) 1 10 100 Figure 15. Output Voltage (VOL) to Supply Rail vs. Load Current 120 100 80 60 GAIN (dB) Figure 18. Output Voltage (VOL) to Supply Rail vs. Load Current 120 100 80 PHASE (Degrees) 120 100 80 CL = 20pF 60 40 20 0 ADA4692-2 VSY = 1.35V TA = 25C AV = -1 10k 100k FREQUENCY (Hz) CL = 200pF -20 -40 07950-021 120 100 80 CL = 20pF PHASE (Degrees) 07950-025 07950-024 60 GAIN (dB) 60 40 20 0 40 20 0 -20 -40 40 20 0 -20 -40 ADA4692-2 VSY = 2.5V TA = 25C AV = -1 10k 100k FREQUENCY (Hz) CL = 200pF -20 -40 -60 10M -60 1k 1M -60 10M -60 1k 1M Figure 16. Open-Loop Gain and Phase vs. Frequency 50 40 30 20 GAIN (dB) Figure 19. Open-Loop Gain and Phase vs. Frequency 50 AV = +100 40 30 AV = +100 AV = +10 GAIN (dB) 20 10 AV = +10 10 AV = +1 0 -10 -20 ADA4692-2 VSY = 1.35V TA = 25C RL = 600 07950-022 AV = +1 0 -10 -20 ADA4692-2 VSY = 2.5V TA = 25C RL = 600 100 1k 10k 100k 1M 10M FREQUENCY (Hz) -30 10 100 1k 10k 100k 1M 10M -30 10 FREQUENCY (Hz) Figure 17. Closed-Loop Gain vs. Frequency Figure 20. Closed-Loop Gain vs. Frequency Rev. A | Page 9 of 16 07950-018 07950-015 0.01 0.001 0.01 0.001 ADA4691-2/ADA4692-2 1k 1k 100 AV = -100 ZOUT () ZOUT () 100 AV = -100 10 AV = -10 1 AV = -1 10 1 AV = -10 0.1 AV = -1 ADA4692-2 VSY = 1.35V TA = 25C 07950-023 0.1 ADA4692-2 VSY = 2.5V TA = 25C 1k 10k 100k 1M 10M FREQUENCY (Hz) 07950-026 07950-031 07950-030 0.01 100 1k 10k 100k 1M 10M 0.01 100 FREQUENCY (Hz) Figure 21. Output Impedance vs. Frequency 120 120 Figure 24. Output Impedance vs. Frequency 100 100 80 CMRR (dB) CMRR (dB) 80 60 60 40 40 20 07950-027 0 100 ADA4692-2 VSY = 1.35V TA = 25C 1k 10k 100k 1M 10M FREQUENCY (Hz) 20 0 100 ADA4692-2 VSY = 2.5V TA = 25C 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 22. CMRR vs. Frequency 100 100 Figure 25. CMRR vs. Frequency PSRR- PSRR+ 80 PSRR+ 60 PSRR (dB) PSRR (dB) 80 PSRR- 60 40 40 20 20 0 1k 10k 100k 1M 10M 07950-028 -20 100 ADA4692-2 VSY = 1.35V TA = 25C FREQUENCY (Hz) 0 -20 100 ADA4692-2 VSY = 2.5V TA = 25C 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 23. PSRR vs. Frequency Figure 26. PSRR vs. Frequency Rev. A | Page 10 of 16 ADA4691-2/ADA4692-2 1k 1k VOLTAGE NOISE DENSITY (nV/ Hz) VOLTAGE NOISE DENSITY (nV/ Hz) 100 100 07950-029 1 10 100 1k 10k 1 10 100 1k 10k FREQUENCY (Hz) FREQUENCY (Hz) Figure 27. Voltage Noise Density vs. Frequency 50 45 40 35 OVERSHOOT (%) Figure 30. Voltage Noise Density vs. Frequency 45 40 35 OVERSHOOT (%) ADA4692-2 VSY = 1.35V VIN = 100mV p-p AV = +1 RL = 2k TA = 25C 30 25 20 ADA4692-2 VSY = 2.5V VIN = 100mV p-p AV = +1 RL = 2k TA = 25C OVERSHOOT+ 30 OVERSHOOT+ 25 OVERSHOOT- 20 15 10 5 07950-033 OVERSHOOT- 15 10 5 07950-036 0 10 100 CAPACITANCE (pF) 1k 0 10 100 CAPACITANCE (pF) 1k Figure 28. Small Signal Overshoot vs. Load Capacitance Figure 31. Small Signal Overshoot vs. Load Capacitance OUTPUT (500mV/DIV) 07950-034 TIME (2s/DIV) TIME (2s/DIV) Figure 29. Large Signal Transient Response Figure 32. Large Signal Transient Response Rev. A | Page 11 of 16 07950-037 ADA4692-2 VSY = 1.35V GAIN = +1 RL = 2k CL = 300pF TA = 25C OUTPUT (500mV/DIV) ADA4692-2 VSY = 2.5V GAIN = +1 RL = 2k, CL = 300pF TA = 25C 07950-032 10 0.1 ADA4692-2 VSY = 1.35V TA = 25C 10 0.1 ADA4692-2 VSY = 2.5V TA = 25C ADA4691-2/ADA4692-2 T OUTPUT (20mV/DIV) 07950-035 TIME (2s/DIV) TIME (2s/DIV) Figure 33. Small Signal Transient Response Figure 36. Small Signal Transient Response OUTPUT (1V/DIV) OUTPUT (1V/DIV) 07950-040 TIME (1s/DIV) TIME (1s/DIV) Figure 34. 0.1 Hz to 10 Hz Noise 250 Figure 37. 0.1 Hz to 10 Hz Noise 250 ADA4692-2 TA = +85C TA = +125C ADA4692-2 200 225 TA = +25C ISY/AMPLIFIER (A) ISY/CHANNEL (A) 150 TA = -40C 100 200 VSY = 2.5V 175 VSY = 1.35V 150 50 0 0.5 1.0 1.5 2.0 2.5 VSY (V) 3.0 3.5 4.0 4.5 5.0 07950-135 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C) Figure 35. Supply Current per Amplifier vs. Supply Voltage Figure 38. Supply Current per Channel vs. Temperature Rev. A | Page 12 of 16 07950-138 0 125 -40 07950-043 ADA4692-2 VSY = 1.35V GAIN = +1M TA = 25C ADA4692-2 VSY = 2.5V GAIN = +1M TA = 25C 07950-038 ADA4692-2 VSY = 1.35V GAIN = +1 RL = 2k CL = 200pF TA = 25C OUTPUT (20mV/DIV) ADA4692-2 VSY = 2.5V GAIN = +1 RL = 2k CL = 200pF TA = 25C ADA4691-2/ADA4692-2 1 ADA4692-2 VSY = 1.35V AV = -1 TA = 25C 1 ADA4692-2 VSY = 2.5V AV = -1 TA = 25C 0.1 THD + N (%) THD + N (%) 0.1 RL = 600 RL = 2k RL = 600 RL = 2k 0.01 0.01 07950-042 100 1k FREQUENCY (Hz) 10k 20k 100 1k FREQUENCY (Hz) 10k 20k Figure 39. THD + Noise vs. Frequency Figure 42. THD + Noise vs. Frequency 50mV/DIV 50mV/DIV 1V/DIV 07950-050 TIME (4s/DIV) TIME (4s/DIV) Figure 40. Positive Overload Recovery Figure 43. Positive Overload Recovery 50mV/DIV 50mV/DIV 1V/DIV 1V/DIV ADA4692-2 VSY = 2.5V AV = -100 TA = 25C TIME (4s/DIV) TIME (4s/DIV) Figure 41. Negative Overload Recovery Figure 44. Negative Overload Recovery Rev. A | Page 13 of 16 07950-053 07950-052 ADA4692-2 VSY = 1.35V TA = 25C 07950-051 ADA4692-2 VSY = 1.35V TA = 25C ADA4692-2 VSY = 2.5V AV = -100 TA = 25C 1V/DIV 07950-045 0.001 10 0.001 10 ADA4691-2/ADA4692-2 200mV/DIV 1V/DIV 10mV/DIV ADA4692-2 VSY = 1.35V RL = 2k TA = 25C TIME (1s/DIV) 20mV/DIV ADA4692-2 VSY = 2.5V RL = 2k TA = 25C TIME (1s/DIV) ERROR BAND Figure 45. Positive Settling Time to 0.1% Figure 48. Positive Settling Time to 0.1% 200mV/DIV 1V/DIV ERROR BAND 10mV/DIV ADA4692-2 VSY = 1.35V RL = 2k TA = 25C TIME (1s/DIV) ERROR BAND 20mV/DIV ADA4692-2 VSY = 2.5V RL = 2k TA = 25C TIME (1s/DIV) Figure 46. Negative Settling Time to 0.1% -80 CS (dB) = 20 log (VOUT/100 = VIN) V+ 3 VIN + - 0 2 V+ V- V- U1 R3 600 0 Figure 49. Negative Settling Time to 0.1% R1 100k V- U2 5 V- V+ V+ 6 7 0 R2 1k -90 CHANNEL SEPARATION (dB) -100 0 -110 -120 ADA4692-2 VSY = 2.5V VIN = 2.8V p-p AV = +1 TA = 25C 1k 10k FREQUENCY (Hz) 100k 07950-140 -130 -140 100 Figure 47. Channel Separation vs. Frequency Rev. A | Page 14 of 16 07950-057 07950-056 07950-055 07950-054 ERROR BAND ADA4691-2/ADA4692-2 SHUTDOWN OPERATION INPUT PIN CHARACTERISTICS The ADA4691-2 has a classic CMOS logic inverter input for each shutdown pin, as shown in Figure 50. VDD P-CHANNEL OUTPUT 07950-149 SDA, B INPUT N-CHANNEL ISY = 724mV/1k = 724A Figure 50. CMOS Inverter With slowly changing inputs, the top transistor and bottom transistor may be slightly on at the same time, increasing the supply current. This can be avoided by driving the input with a digital logic output having fast rise and fall times. Figure 51 through Figure 53 show the supply current for both sections switching simultaneously with rise times of 1 s, 10 s, and 1 ms. Clearly, the rise and fall times should be faster than 10 us. Using an RC time constant to enable/disable shutdown is not recommended. TIME (400s/DIV) Figure 53. Shutdown Pin Rise Time = 1 ms INPUT THRESHOLD The input threshold is approximately 1.2 V above the V- pin when operating on ground and +5 V, and 0.9 V when operating on 2.7 V (see Figure 54 and Figure 55). The threshold is relatively stable over temperature. For operation on split supplies, the logic swing may have to be level shifted. 500 ADA4691-2 450 TA = 25C VSY = 5V ISY = 196mV/1k = 196A 400 350 300 TA = +125C TA = +85C ISY (A) 250 200 150 SDA, B DUT OUTPUT 07950-150 100 50 0 0.5 1.0 TA = -40C TA = +25C TIME (400s/DIV) 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 SD VOLTAGE (V) Figure 54. Supply Current vs. Temperature, VSY = 5 V 300 ISY = 192mV/1k = 196A ADA4691-2 VSY = 2.7V 250 200 ISY (A) TA = +125C 150 TA = +85C SDA, B DUT OUTPUT 07950-151 100 TA = -40C 50 TA = +25C TIME (400s/DIV) Figure 52. Shutdown Pin Rise Time = 10 s 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 SD VOLTAGE (V) 07950-156 0 Figure 55. Supply Current vs. Temperature, VSY = 2.7 V Rev. A | Page 15 of 16 07950-155 Figure 51. Shutdown Pin Rise Time = 1 s 0 07950-152 DUT OUTPUT ADA4691-2/ADA4692-2 OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 4.00 (0.1574) 3.80 (0.1497) 8 1 5 4 6.20 (0.2441) 5.80 (0.2284) 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 SEATING PLANE 1.75 (0.0688) 1.35 (0.0532) 0.50 (0.0196) 0.25 (0.0099) 8 0 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) 45 0.51 (0.0201) 0.31 (0.0122) COMPLIANT TO JEDEC STANDARDS MS-012-A A CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. Figure 56. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) 2.00 BSC SQ 0.50 0.45 0.40 9 8 10 1 PIN 1 INDEX AREA PIN 1 INDICATOR 0.30 0.25 0.18 TOP VIEW 6 5 4 BOTTOM VIEW 3 0.60 0.55 0.50 SEATING PLANE 0.50 BSC 0.05 MAX 0.02 NOM COPLANARITY 0.05 0.20 REF 081308-D Figure 57. 10-Lead Lead Frame Chip Scale Package [LFCSP_UQ] 2 mm x 2 mm Body, Ultra Thin Quad (CP-10-11) Dimensions shown in millimeters ORDERING GUIDE Model ADA4691-2ACPZ-R71 ADA4691-2ACPZ-RL1 ADA4691-2ACPZ-R21 ADA4692-2ARZ 1 ADA4692-2ARZ-R71 ADA4692-2ARZ-RL1 1 Temperature Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package Description 10-Lead_LFCSP_UQ 10-Lead_LFCSP_UQ 10-Lead_LFCSP_UQ 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N Package Option CP-10-11 CP-10-11 CP-10-11 R-8 R-8 R-8 012407-A Branding Code A2 A2 A2 Z = RoHS Compliant Part. (c)2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07950-0-6/09(A) Rev. A | Page 16 of 16 |
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