Dual, Low Power, Wideband, Low Noise, Rail-to-Rail Output, Operational Amplifiers ADA4691-2/ADA4692-2 +IN 3 TOP VIEW (Not to Scale) V– 4 8 V+ 7 OUT B 6 –IN B 5 +IN B 07950-001 ADA4692-2 –IN A 1 +IN A 2 V– 3 9 V+ Figure 1. 8-Lead SOIC_N (R-8) ADA4691-2 TOP VIEW (Not to Scale) 8 OUT B 7 –IN B 6 +IN B 07950-002 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 2 SD B 5 APPLICATIONS OUT A 1 10 OUT A Low power: 200 μA typical, 250 μA maximum Low distortion: 0.003% THD + N Low noise: 16 nV/√Hz typical 3.9 MHz bandwidth Slew rate: 1.4 V/μs typical Offset voltage: 500 μV typical Low offset voltage drift: 4 μV/°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 SD A 4 FEATURES 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 (−40°C to +125°C). 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 ©2009 Analog Devices, Inc. All rights reserved. ADA4691-2/ADA4692-2 TABLE OF CONTENTS Features .............................................................................................. 1 Thermal Resistance .......................................................................6 Applications ....................................................................................... 1 ESD Caution...................................................................................6 Pin Configurations ........................................................................... 1 Typical Performance Characteristics ..............................................7 General Description ......................................................................... 1 Shutdown Operation ...................................................................... 15 Revision History ............................................................................... 2 Input Pin Characteristics ........................................................... 15 Specifications..................................................................................... 3 Input Threshold .......................................................................... 15 Electrical Characteristics—2.7 V Operation ............................ 3 Outline Dimensions ....................................................................... 16 Electrical Characteristics—5 V Operation................................ 4 Ordering Guide .......................................................................... 16 Absolute Maximum Ratings............................................................ 6 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 = 25°C, 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 Output Voltage Low Symbol Test Conditions/Comments VOS VCM = −0.3 V to +1.6 V VCM = −0.1 V to +1.6 V; −40°C < TA < +125°C Min IB Typ Max Unit 0.5 2.5 3.5 5 350 325 5 225 +1.6 mV mV pA pA pA pA pA V dB dB dB dB dB 0.5 −40°C < TA < +125°C −40°C < TA < +125°C IOS CMRR AVO ∆VOS/∆T CIN CINDM CINCM VIH VIL IIN VOH VOL Short-Circuit Current Closed-Loop Output Impedance Output Pin Leakage Current POWER SUPPLY Power Supply Rejection Ratio ISC ZOUT Supply Current Per Amplifier ADA4691-2 ADA4692-2 Supply Current Shutdown Mode ISY PSRR ISD 1 −40°C < TA < +125°C −40°C < TA < +125°C VCM = −0.3 V to +1.6 V VCM = −0.1 V to +1.6 V; −40°C < TA < +125°C VCM = −0.1 V to +1.6 V; −40°C < TA < +125°C RL = 2 kΩ, VOUT = 0.5 V to 2.2 V −40°C < TA < +85°C −40°C < TA < +85°C −40°C < TA < +125°C −40°C < TA < +125°C RL = 600 Ω, VOUT = 0.5 V to 2.2 V −40°C < TA < +125°C −0.3 70 62 70 90 80 85 67 73 85 90 100 dB 95 0.8 3 dB μV/°C 0.5 1 pF pF V V μA 2.5 7 −40°C < TA < +125°C −40°C < TA < +125°C −40°C < TA < +125°C, 0 V ≤ VSD ≤ 2.7 V +1.6 RL = 2 kΩ to GND −40°C < TA < +125°C RL = 600 Ω to GND −40°C < TA < +125°C RL = 2 kΩ to VSY −40°C < TA < +125°C RL = 600 Ω to VSY −40°C < TA < +125°C VOUT = VSY or GND f = 1 MHz, AV = −100 −40°C < TA < +125°C, shutdown active, VSD = VSS 2.65 2.6 2.55 2.5 VS = 2.7 V to 5.5 V −40°C < TA < +125°C VOUT = VSY/2 −40°C < TA < +125°C −40°C < TA < +125°C All amplifiers shut down, VShutDown = VSS −40°C < TA < +125°C 80 75 Rev. A | Page 3 of 16 2.67 2.59 24 78 30 40 95 125 ±15 372 1 90 165 200 240 225 10 2 V V V V mV mV mV mV mA Ω nA dB dB μA μA μA nA μA 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 Voltage Noise Voltage Noise Density Symbol Test Conditions/Comments SR SR tS GBP RL = 600 Ω, CL = 20 pF, AV = +1 RL = 2 kΩ, CL = 20 pF, AV = +1 Step = 0.5 V, RL = 2 kΩ, 600 Ω RL = 1 MΩ, CL = 35 pF, AV = +1 1.1 1.4 1 3.6 V/μs V/μs μs MHz GBP RL = 1 MΩ, CL = 35 pF, AV = +1 3.9 MHz ΦM RL = 1 MΩ, CL = 35 pF, AV = +1 RL = 600 Ω 49 1 Degrees μs THD + N AV = −1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.15 V rms 0.009 % AV = −1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.15 V rms AV = +1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.15 V rms AV = +1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.15 V rms f = 0.1 Hz to 10 Hz f = 1 kHz f = 10 kHz 0.01 0.006 0.007 3.1 16 13 % % % μV p-p nV/√Hz nV/√Hz en p-p en Min Typ Max Unit ELECTRICAL CHARACTERISTICS—5 V OPERATION VSY = 5 V, VCM = VSY/2, TA = 25°C, unless otherwise specified. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Symbol Test Conditions/Comments VOS VCM = −0.3 V to +3.9 V VCM = −0.1 V to +3.9 V; −40°C < TA < +125°C Min IB Typ Max Unit 0.5 2.5 3.5 5 360 5 260 +3.9 4 mV mV pA pA pA pA V dB dB dB dB dB dB dB dB dB μV/°C 0.8 1 pF pF V V μA 0.5 −40°C < TA < +125°C 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 IOS CMRR AVO ∆VOS/∆T CINDM CINCM VIH VIL IIN VOH 1 −40°C < TA < +125°C −40°C < TA < +125°C VCM = −0.3 V to +3.9 V VCM = −0.1 V to +3.9 V; −40°C < TA < +125°C VCM = −0.1 V to +3.9 V; −40°C < TA < +125°C RL = 2 kΩ, VO = 0.5 V to 4.5 V, VCM = 0 V −40°C < TA < +85°C −40°C < TA < +85°C −40°C < TA < +125°C −40°C < TA < +125°C RL = 600 Ω, VO = 0.5 V to 4.5 V, VCM = 0 V −40°C < TA < +125°C −0.3 75 68 75 95 80 90 75 80 90 98 110 100 1 2.5 7 −40°C < TA < +125°C −40°C < TA < +125°C −40°C < TA < +125°C, 0 V ≤ VSD ≤ 2.7 V +2.0 RL = 2 kΩ −40°C ≤ TA ≤ +125°C RL = 600 Ω to GND 4.95 4.90 4.85 Rev. A | Page 4 of 16 4.97 4.88 V V V ADA4691-2/ADA4692-2 Parameter Output Voltage Low Symbol VOL Short-Circuit Limit Closed-Loop Output Impedance Closed-Loop Output Impedance Output Pin Leakage Current POWER SUPPLY Power Supply Rejection Ratio ISC ZOUT ZOUT Supply Current per Amplifier ADA4691-2 ADA4692-2 Supply Current Shutdown Mode ISY DYNAMIC PERFORMANCE Slew Rate Settling Time to 0.1% Gain Bandwidth Product Phase Margin Turn-on, Turn-off time NOISE PERFORMANCE Distortion Voltage Noise Voltage Noise Density PSRR ISD Test Conditions/Comments −40°C ≤ TA ≤ +125°C RL = 2 kΩ −40°C ≤ TA ≤ +125°C RL = 600 Ω −40°C ≤ TA ≤ +125°C VOUT = VSY or GND ADA4691-2, f = 1 MHz, AV = −100 ADA4691-2, f = 1 MHz, AV = −100 −40°C < TA < +125°C, shutdown active, VSD = VSS Min 4.80 VSY = 2.7 V to 5.5 V −40°C ≤ TA ≤ +125°C VOUT = VSY/2 −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C All amplifiers shutdown, VShutDown = VSS −40°C ≤ TA ≤ +125°C 80 75 Typ Max 28 35 45 110 140 90 ±55 364 246 1 90 180 225 275 250 10 2 Unit V mV mV mV mV mA Ω Ω nA dB dB μA μA μA nA uA SR tS GBP ΦM RL = 2 kΩ, 600 Ω, CL = 20 pF, AV = +1 VIN = 2 V step, RL = 2 kΩ or 600 Ω RL = 1 MΩ, CL = 35 pF, AV = +1 RL = 1 MΩ, CL = 35 pF, AV = +1 RL = 600 Ω 1.3 1.5 3.6 52 1 V/μs μs MHz Degrees μs THD + N AV = −1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.8 V rms 0.008 % en p-p en en AV = −1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.8 V rms AV = +1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.8 V rms AV = +1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.8 V rms f = 0.1 Hz to 10 Hz f = 1 kHz f = 10 kHz 0.006 0.003 0.001 3.2 16 13 % % % μV p-p nV/√Hz nV/√Hz Rev. A | Page 5 of 16 ADA4691-2/ADA4692-2 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE 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) Rating 6V VSS − 0.3 V to VDD +0.3 V ±10 mA 50 μs maximum ±VSY Indefinite −65°C to +150°C −40°C to +125°C −65°C to +150°C 300°C θJA 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) ESD CAUTION 1 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 θJA 155 88 θJC 45 32 Unit °C/W °C/W ADA4691-2/ADA4692-2 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 700 ADA4692-2 VSY = 2.7V T 300 A = 25°C –0.3V ≤ VCM ≤ +1.6V SIGNIFIES CENTER OF BIN 250 NUMBER OF AMPLIFIERS 200 150 100 ADA4692-2 VSY = 5V T 600 A = 25°C –0.3V ≤ VCM ≤ +3.9V SIGNIFIES CENTER OF BIN 500 400 300 200 07950-003 0 –2.0 –1.6 –1.2 –0.8 –0.4 Figure 3. Input Offset Voltage Distribution 30 15 10 1.2 1.6 2.0 20 15 10 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 (µV/°C) 0 07950-004 0 0 1.5 2.0 ADA4692-2 VSY = 2.7V TA = 25°C 0.5 VOS (mV) 0.5 0 –0.5 –1.0 –1.0 –1.5 –1.5 1.5 2.0 VCM (V) 2.5 –2.0 –0.5 07950-005 1.0 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 4.5 5.0 0 –0.5 0.5 0.8 ADA4692-2 VSY = 5V TA = 25°C 1.5 1.0 0 0.6 Figure 7. Input Offset Voltage Drift Distribution 1.0 –2.0 –0.5 0.4 TCVOS (µV/°C) Figure 4. Input Offset Voltage Drift Distribution 2.0 0.2 07950-007 5 5 VOS (mV) 0.8 ADA4692-2 VSY = ±2.5V –40°C < TA < +125°C SIGNIFIES CENTER OF BIN 25 NUMBER OF AMPLIFIERS NUMBER OF AMPLIFIERS 30 20 0 0.4 Figure 6. Input Offset Voltage Distribution ADA4692-2 VSY = ±1.35V –40°C < TA < +125°C SIGNIFIES CENTER OF BIN 25 0 VOS (mV) 07950-006 100 50 07950-008 NUMBER OF AMPLIFIERS 350 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 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 ADA4691-2/ADA4692-2 1k 1k ADA4692-2 VSY = ±1.35V TA = 25°C AVERAGE 20 CHANNELS 100 ADA4692-2 VSY = ±2.5V TA = 25°C AVERAGE 20 CHANNELS 100 10 0.1 0.1 35 45 55 65 75 85 95 105 115 125 TEMPERATURE (°C) 0.01 25 07950-009 0.01 25 35 45 55 65 75 85 95 105 115 125 4.5 5.0 100 TEMPERATURE (°C) Figure 9. Input Bias Current vs. Temperature 07950-012 1 07950-013 1 07950-014 IB (pA) IB (pA) 10 Figure 12. Input Bias Current vs. Temperature 1k 1k TA = 125°C TA = 125°C 100 100 TA = 85°C IB (pA) 10 1 ADA4692-2 VSY = 2.7V AVERAGE 20 CHANNELS 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 VCM (V) 0.01 OUTPUT SATURATION VOLTAGE (mV) TA = +125°C 100 TA = +85°C 10 TA = +25°C TA = –40°C 1 0.1 0.01 0.001 0.01 0.1 1 10 100 1.0 1.5 2.0 ILOAD (mA) 1k ADA4692-2 VSY = ±2.5V VOH = (V+) – VOUT (SOURCING) 2.5 3.0 3.5 4.0 TA = +125°C 100 TA = +85°C 10 TA = +25°C 1 TA = –40°C 0.1 0.01 0.001 07950-011 OUTPUT SATURATION VOLTAGE (mV) 1k 0.5 Figure 13. Input Bias Current vs. Common-Mode Voltage 10k ADA4692-2 VSY = ±1.35V VOH = (V+) – VOUT (SOURCING) 0 VCM (V) Figure 10. Input Bias Current vs. Common-Mode Voltage 10k TA = 25°C 0.1 0.01 0.001 TA = 85°C 1 TA = 25°C 0.1 07950-010 IB (pA) 10 ADA4692-2 VSY = 5V AVERAGE 20 CHANNELS 0.01 0.1 1 10 ILOAD (mA) 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 ADA4691-2/ADA4692-2 10k 100 TA = +85°C 10 TA = +25°C 1 TA = –40°C 0.1 0.01 0.1 1 10 100 ILOAD (mA) TA = +85°C 10 TA = +25°C 1 TA = –40°C 0.1 0.01 0.1 1 10 100 ILOAD (mA) Figure 15. Output Voltage (VOL) to Supply Rail vs. Load Current Figure 18. Output Voltage (VOL) to Supply Rail vs. Load Current 120 120 120 100 100 100 100 80 80 80 80 60 60 40 40 20 20 0 0 –60 1k 10k 100k 40 40 20 20 0 0 –20 –20 –40 –40 –60 10M 1M FREQUENCY (Hz) –60 1k –40 10k 100k –60 10M 1M FREQUENCY (Hz) Figure 19. Open-Loop Gain and Phase vs. Frequency 50 50 AV = +100 40 AV = +100 40 30 30 AV = +10 AV = +10 20 GAIN (dB) 20 10 AV = +1 0 10 AV = +1 0 –10 –10 ADA4692-2 VSY = ±1.35V TA = 25°C RL = 600Ω –30 10 100 –20 1k 10k 100k 1M FREQUENCY (Hz) 10M ADA4692-2 VSY = ±2.5V TA = 25°C RL = 600Ω –30 10 07950-022 GAIN (dB) –20 CL = 200pF ADA4692-2 VSY = ±2.5V TA = 25°C AV = –1 Figure 16. Open-Loop Gain and Phase vs. Frequency –20 60 CL = 20pF 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 17. Closed-Loop Gain vs. Frequency Figure 20. Closed-Loop Gain vs. Frequency Rev. A | Page 9 of 16 10M 07950-025 –40 CL = 200pF ADA4692-2 VSY = ±1.35V TA = 25°C AV = –1 07950-021 –20 GAIN (dB) CL = 20pF PHASE (Degrees) 120 60 GAIN (dB) TA = +125°C 100 0.01 0.001 07950-015 0.01 0.001 1k 07950-018 TA = +125°C PHASE (Degrees) 1k ADA4692-2 VSY = ±2.5V VOL = VOUT – (V–) (SINKING) 07950-024 ADA4692-2 VSY = ±1.35V VOL = VOUT – (V–) (SINKING) OUTPUT SATURATION VOLTAGE (mV) OUTPUT SATURATION VOLTAGE (mV) 10k ADA4691-2/ADA4692-2 1k 1k 100 100 AV = –100 1 ZOUT (Ω) ZOUT (Ω) AV = –100 10 AV = –10 10 AV = –10 1 AV = –1 AV = –1 0.1 ADA4692-2 VSY = ±1.35V TA = 25°C 1k 10k 100k 1M 10M FREQUENCY (Hz) 0.01 100 07950-023 0.01 100 120 120 100 100 80 80 60 1M 10M 60 40 20 ADA4692-2 VSY = ±1.35V TA = 25°C 1k 10k 100k 1M 10M FREQUENCY (Hz) ADA4692-2 VSY = ±2.5V TA = 25°C 0 100 07950-027 0 100 1k 100 10k 100k 1M 10M 1M 10M FREQUENCY (Hz) Figure 22. CMRR vs. Frequency Figure 25. CMRR vs. Frequency 100 PSRR– 80 PSRR+ 80 PSRR– PSRR+ 60 PSRR (dB) 60 40 40 20 0 ADA4692-2 VSY = ±1.35V TA = 25°C –20 100 1k 10k 100k FREQUENCY (Hz) 1M 10M Figure 23. PSRR vs. Frequency ADA4692-2 VSY = ±2.5V TA = 25°C –20 100 1k 10k 100k FREQUENCY (Hz) Figure 26. PSRR vs. Frequency Rev. A | Page 10 of 16 07950-031 20 07950-028 PSRR (dB) 100k 07950-030 40 0 10k Figure 24. Output Impedance vs. Frequency CMRR (dB) CMRR (dB) 1k FREQUENCY (Hz) Figure 21. Output Impedance vs. Frequency 20 ADA4692-2 VSY = ±2.5V TA = 25°C 07950-026 0.1 ADA4691-2/ADA4692-2 100 ADA4692-2 VSY = ±1.35V TA = 25°C 10 0.1 1 10 100 1k 100 ADA4692-2 VSY = ±2.5V TA = 25°C 10k 10 0.1 FREQUENCY (Hz) 35 10k ADA4692-2 VSY = ±2.5V VIN = 100mV p-p AV = +1 RL = 2kΩ TA = 25°C 40 35 30 OVERSHOOT+ 25 OVERSHOOT– 20 15 30 OVERSHOOT+ 25 20 OVERSHOOT– 15 10 10 100 1k CAPACITANCE (pF) 0 10 07950-033 0 10 07950-034 TIME (2µs/DIV) 1k Figure 31. Small Signal Overshoot vs. Load Capacitance OUTPUT (500mV/DIV) Figure 28. Small Signal Overshoot vs. Load Capacitance ADA4692-2 VSY = ±1.35V GAIN = +1 RL = 2kΩ CL = 300pF TA = 25°C 100 CAPACITANCE (pF) ADA4692-2 VSY = ±2.5V GAIN = +1 RL = 2kΩ, CL = 300pF TA = 25°C TIME (2µs/DIV) Figure 29. Large Signal Transient Response Figure 32. Large Signal Transient Response Rev. A | Page 11 of 16 07950-036 5 5 OUTPUT (500mV/DIV) 1k 07950-037 OVERSHOOT (%) 45 OVERSHOOT (%) 40 100 Figure 30. Voltage Noise Density vs. Frequency ADA4692-2 VSY = ±1.35V VIN = 100mV p-p AV = +1 RL = 2kΩ TA = 25°C 45 10 FREQUENCY (Hz) Figure 27. Voltage Noise Density vs. Frequency 50 1 07950-032 VOLTAGE NOISE DENSITY (nV/ Hz) 1k 07950-029 VOLTAGE NOISE DENSITY (nV/ Hz) 1k ADA4691-2/ADA4692-2 OUTPUT (20mV/DIV) ADA4692-2 VSY = ±2.5V GAIN = +1 RL = 2kΩ CL = 200pF TA = 25°C 07950-035 ADA4692-2 VSY = ±1.35V GAIN = +1 RL = 2kΩ CL = 200pF TA = 25°C TIME (2µs/DIV) 07950-038 OUTPUT (20mV/DIV) T TIME (2µs/DIV) Figure 36. Small Signal Transient Response OUTPUT (1µV/DIV) OUTPUT (1µV/DIV) Figure 33. Small Signal Transient Response TIME (1s/DIV) TIME (1s/DIV) Figure 37. 0.1 Hz to 10 Hz Noise Figure 34. 0.1 Hz to 10 Hz Noise 250 250 ADA4692-2 07950-043 ADA4692-2 VSY = ±2.5V GAIN = +1M TA = 25°C 07950-040 ADA4692-2 VSY = ±1.35V GAIN = +1M TA = 25°C TA = +125°C ADA4692-2 TA = +85°C 225 ISY/AMPLIFIER (µA) TA = +25°C 150 TA = –40°C 100 VSY = ±2.5V 175 VSY = ±1.35V 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VSY (V) 5.0 125 –40 –25 –10 5 20 35 50 65 80 95 110 TEMPERATURE (°C) Figure 38. Supply Current per Channel vs. Temperature Figure 35. Supply Current per Amplifier vs. Supply Voltage Rev. A | Page 12 of 16 125 07950-138 0 200 150 50 07950-135 ISY/CHANNEL (µA) 200 ADA4691-2/ADA4692-2 1 ADA4692-2 VSY = ±1.35V AV = –1 TA = 25°C THD + N (%) 0.1 RL = 2kΩ 0.001 10 100 1k RL = 2kΩ 0.01 10k 20k FREQUENCY (Hz) 07950-042 0.01 RL = 600Ω 0.001 10 100 1k 10k 20k FREQUENCY (Hz) Figure 42. THD + Noise vs. Frequency Figure 39. THD + Noise vs. Frequency 50mV/DIV 50mV/DIV 1V/DIV ADA4692-2 VSY = ±2.5V AV = –100 TA = 25°C 07950-050 ADA4692-2 VSY = ±1.35V TA = 25°C TIME (4µs/DIV) 1V/DIV TIME (4µs/DIV) Figure 40. Positive Overload Recovery Figure 43. Positive Overload Recovery 50mV/DIV 50mV/DIV 1V/DIV 1V/DIV TIME (4µs/DIV) ADA4692-2 VSY = ±2.5V AV = –100 TA = 25°C 07950-052 ADA4692-2 VSY = ±1.35V TA = 25°C TIME (4µs/DIV) Figure 41. Negative Overload Recovery Figure 44. Negative Overload Recovery Rev. A | Page 13 of 16 07950-045 RL = 600Ω 07950-051 THD + N (%) 0.1 ADA4692-2 VSY = ±2.5V AV = –1 TA = 25°C 07950-053 1 ADA4691-2/ADA4692-2 1V/DIV 200mV/DIV TIME (1µs/DIV) TIME (1µs/DIV) Figure 45. Positive Settling Time to 0.1% Figure 48. Positive Settling Time to 0.1% 200mV/DIV 1V/DIV ERROR BAND ERROR BAND TIME (1µs/DIV) ADA4692-2 VSY = ±2.5V RL = 2kΩ TA = 25°C 07950-056 ADA4692-2 VSY = ±1.35V RL = 2kΩ TA = 25°C TIME (1µs/DIV) Figure 46. Negative Settling Time to 0.1% –80 CS (dB) = 20 log (VOUT/100 = VIN) V+ VIN + – 0 2 R1 100kΩ V– U1 V+ V– R3 600Ω V– 0 U2 5 V– V+ R2 1kΩ 6 7 0 0 V+ –110 –120 ADA4692-2 VSY = ±2.5V VIN = 2.8V p-p AV = +1 TA = 25°C –130 –140 100 1k 10k FREQUENCY (Hz) 100k 07950-140 CHANNEL SEPARATION (dB) –100 3 Figure 49. Negative Settling Time to 0.1% Figure 47. Channel Separation vs. Frequency Rev. A | Page 14 of 16 07950-057 20mV/DIV 10mV/DIV –90 ADA4692-2 VSY = ±2.5V RL = 2kΩ TA = 25°C ERROR BAND 07950-054 ADA4692-2 VSY = ±1.35V RL = 2kΩ TA = 25°C ERROR BAND 07950-055 20mV/DIV 10mV/DIV 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. SDA, B VDD P-CHANNEL N-CHANNEL 07950-149 OUTPUT INPUT ISY = 724mV/1k = 724µA Figure 50. CMOS Inverter DUT OUTPUT 07950-152 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 μs, 10 μs, 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 (400µs/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 = 25°C VSY = 5V 400 ISY = 196mV/1k = 196µA 350 TA = +125°C ISY (µA) 300 SDA, B TA = +85°C 250 200 150 DUT OUTPUT 07950-150 0 Figure 51. Shutdown Pin Rise Time = 1 μs 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 07950-155 50 2.7 07950-156 TIME (400µs/DIV) TA = +25°C TA = –40°C 100 SD VOLTAGE (V) Figure 54. Supply Current vs. Temperature, VSY = 5 V 300 ISY = 192mV/1k = 196µA ADA4691-2 VSY = 2.7V 250 ISY (µA) 200 SDA, B DUT OUTPUT TA = +125°C TA = +85°C 150 TIME (400µs/DIV) 07950-151 100 TA = +25°C TA = –40°C 50 Figure 52. Shutdown Pin Rise Time = 10 μs 0 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 SD VOLTAGE (V) Figure 55. Supply Current vs. Temperature, VSY = 2.7 V Rev. A | Page 15 of 16 ADA4691-2/ADA4692-2 OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 8 1 5 4 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) 6.20 (0.2441) 5.80 (0.2284) 0.50 (0.0196) 0.25 (0.0099) 1.75 (0.0688) 1.35 (0.0532) 8° 0° 0.51 (0.0201) 0.31 (0.0122) COPLANARITY 0.10 SEATING PLANE 45° 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) 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. 012407-A 4.00 (0.1574) 3.80 (0.1497) Figure 56. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) PIN 1 INDEX AREA 0.50 0.45 0.40 2.00 BSC SQ 9 8 0.30 0.25 0.18 1 6 3 5 TOP VIEW 0.60 0.55 0.50 PIN 1 INDICATOR 10 4 BOTTOM VIEW 0.05 MAX 0.02 NOM COPLANARITY 0.05 SEATING PLANE 0.20 REF 081308-D 0.50 BSC Figure 57. 10-Lead Lead Frame Chip Scale Package [LFCSP_UQ] 2 mm × 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 −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C 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 Z = RoHS Compliant Part. ©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 Package Option CP-10-11 CP-10-11 CP-10-11 R-8 R-8 R-8 Branding Code A2 A2 A2