ADA4096-2_1107

30 V, Micropower, Overvoltage Protection, Rail-to-Rail Input/Output Amplifier ADA4096-2 FEATURES Input overvoltage protection, 32 V above and below the supply rails Rail-to-rail input and output swing Low power: 60 μA per amplifier typical Unity-gain bandwidth 800 kHz typical @ VSY = ±15 V 550 kHz typical @ VSY = ±5 V 465 kHz typical @ VSY = ±1.5 V Single-supply operation: 3 V to 30 V Low offset voltage: 300 μV maximum High open-loop gain: 120 dB typical Unity-gain stable No phase reversal Qualified for automotive applications PIN CONFIGURATIONS OUTA 1 –INA 2 +INA 3 –V 4 8 +V OUTB +INB 09241-001 ADA4096-2 TOP VIEW (Not to Scale) 7 6 5 –INB Figure 1. 8-Lead, MSOP (RM-8) OUTA 1 –INA 2 +INA 3 –V 4 8 +V ADA4096-2 TOP VIEW (Not to Scale) 7 OUTB 6 –INB 5 +INB 09241-002 NOTES 1. CONNECT THE EXPOSED PAD TO GROUND. Figure 2. 8-Lead LFCSP (CP-8-10) APPLICATIONS Battery monitoring Sensor conditioners Portable power supply control Portable instrumentation GENERAL DESCRIPTION The ADA4096 operational amplifier features micropower operation and rail-to-rail input and output ranges. The extremely low power requirements and guaranteed operation from 3 V to 30 V make these amplifiers perfectly suited to monitor battery usage and to control battery charging. Their dynamic performance, including 27 nV/√Hz voltage noise density, recommends them for battery-powered audio applications. Capacitive loads to 200 pF are handled without oscillation. The ADA4096-2 has overvoltage protection inputs and diodes that allow the voltage input to extend 32 V above and below the supply rails, making this device ideal for robust industrial applications. The ADA4096-2 features a unique input stage that allows the input voltage to exceed either supply safely without any phase reversal or latch-up; this is called overvoltage protection, or OVP. The dual ADA4096-2 is available in 8-lead LFCSP (2 mm × 2 mm) and 8-lead MSOP packages. The ADA409x family is specified over the extended industrial temperature range (−40°C to +125°C) and is part of the growing selection of 30 V, low power op amps from Analog Devices, Inc. (see Table 1). Table 1. Low Power, 30 V Operational Amplifiers Op Amp Dual Quad Rail-to-Rail I/O ADA4091-2 ADA4091-4 PJFET AD8682 AD8684 Low Noise AD8622 AD8624 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 ©2011 Analog Devices, Inc. All rights reserved. ADA4096-2 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Pin Configurations ........................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Specifications............................................................... 3 Absolute Maximum Ratings............................................................ 7 Thermal Resistance ...................................................................... 7 ESD Caution.................................................................................. 7 Typical Performance Characteristics ............................................. 8 ±1.5 V Characteristics.................................................................. 8 ±5 V Characteristics................................................................... 10 ±15 V Characteristics ................................................................ 12 Comparative Voltage and Variable Voltage Graphs............... 14 Theory of Operation ...................................................................... 15 Input Stage................................................................................... 15 Phase Inversion........................................................................... 15 Input Overvoltage Protection ................................................... 16 Comparator Operation.............................................................. 17 Outline Dimensions ....................................................................... 18 Ordering Guide .......................................................................... 19 Automotive Products ................................................................. 19 REVISION HISTORY 7/11—Revision 0: Initial Version Rev. 0 | Page 2 of 20 ADA4096-2 SPECIFICATIONS ELECTRICAL SPECIFICATIONS, VSY = ±1.5 V VSY = ±1.5 V, VCM = VSY/2, TA = 25°C, unless otherwise noted. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol VOS 0°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain IOS −40°C ≤ TA ≤ +125°C CMRR AVO VCM = 0 V to ±1.5 V −40°C ≤ TA ≤ +125°C RL = 10 kΩ, VO = −1.4 V to +1.4 V −40°C ≤ TA ≤ +125°C RL = 2 kΩ, VO = −1.3 V to +1.3 V −40°C ≤ TA ≤ +125°C TA = 25°C VOH RL = 10 kΩ to GND −40°C ≤ TA ≤ +125°C RL = 2 kΩ to GND −40°C to +125°C RL = 10 kΩ to GND −40°C ≤ TA ≤ +125°C RL = 2 kΩ to GND −40°C ≤ TA ≤ +125°C Source/sink f = 100 kHz, AV = 1 VSY = 3 V to 36 V −40°C ≤ TA ≤ +125°C VO = VSY/2 −40°C ≤ TA ≤ +125°C RL = 100 kΩ, CL = 30 pF VIN = 5 mV p-p, RL = 10 kΩ, AV = 100 VIN = 5 mV p-p, RL = 10 kΩ, AV = 1 AV = 1, VIN = 5 mV p-p 0.1 Hz to 10 Hz f = 1 kHz f = 1 kHz 1.48 1.45 1.45 1.40 −1.5 63 58 92 84 86 77 77 94 92 ±0.1 Test Conditions/Comments Min Typ 35 Max 300 450 900 ±15 ±16 ±1.5 ±3 +1.5 Unit μV μV μV μV/°C nA nA nA nA V dB dB dB dB dB dB μV V V V V V V V V mA Ω dB dB μA μA V/μs kHz kHz Degrees kHz μV p-p nV/√Hz pA/√Hz Offset Voltage Drift Input Bias Current ∆VOS/∆T IB 1 ±10 MATCHING CHARACTERISTICS Offset Voltage OUTPUT CHARACTERISTICS Output Voltage High 100 1.49 1.46 −1.49 −1.48 ±10 102 100 90 40 300 Output Voltage Low VOL −1.48 −1.45 −1.47 −1.40 Short-Circuit Limit Closed-Loop Impedance POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Unity-Gain Crossover Phase Margin −3 dB Closed-Loop Bandwidth NOISE PERFORMANCE Voltage Noise Voltage Noise Density Current Noise Density ISC ZOUT PSRR ISY 80 0.25 501 465 51 97 0.7 27 0.2 SR GBP UGC ΦM −3 dB en p-p en in Rev. 0 | Page 3 of 20 ADA4096-2 ELECTRICAL SPECIFICATIONS, VSY = ±5 V VSY = ±5.0 V, VCM = VSY/2, TA = 25°C, unless otherwise noted. Table 3. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Symbol VOS −40°C ≤ TA ≤ +125°C ∆VOS/∆T IB −40°C ≤ TA ≤ +125°C IOS −40°C ≤ TA ≤ +125°C CMRR VCM = −5 V to +5 V −40°C ≤ TA ≤ +125°C VCM = −3 V to +3 V −40°C ≤ TA ≤ +125°C RL = 10 kΩ, VO = ±4.8 V −40°C ≤ TA ≤ +125°C RL = 2 kΩ, VO = ±4.7 V −40°C ≤ TA ≤ +125°C TA = 25°C VOH RL = 10 kΩ to GND −40°C ≤ TA ≤ +125°C RL = 2 kΩ to GND −40°C ≤ TA ≤ +125°C RL = 10 kΩ to GND −40°C ≤ TA ≤ +125°C RL = 2 kΩ to GND −40°C ≤ TA ≤ +125°C Source/sink f = 100 kHz, AV = 1 VSY = 3 V to 36 V −40°C ≤ TA ≤ +125°C VO = VSY/2 −40°C ≤ TA ≤ +125°C RL = 100 kΩ, CL = 30 pF VIN = 5 mV p-p, RL = 10 kΩ, AV = 100 VIN = 5 mV p-p, RL = 10 kΩ, AV = 1 AV = 1, VIN = 5 mV p-p 0.1 Hz to 10 Hz f = 1 kHz f = 1 kHz 4.96 4.95 4.80 4.70 −5 73 68 91 85 102 99 94 88 86 103 111 103 ±1.5 1 ±10 Test Conditions/Comments Min Typ 35 Max 300 500 ±15 ±19 ±2 ±3 +5 Unit μV μV μV/°C nA nA nA nA V dB dB dB dB dB dB dB dB μV V V V V V V V V mA Ω dB dB μA μA V/μs kHz kHz Degrees kHz μV p-p nV/√Hz pA/√Hz Large Signal Voltage Gain AVO MATCHING CHARACTERISTICS Offset Voltage OUTPUT CHARACTERISTICS Output Voltage High 100 4.97 4.90 −4.98 −4.90 ±10 71 100 90 47 300 Output Voltage Low VOL −4.97 −4.95 −4.80 −4.75 Short-Circuit Limit Closed-Loop Impedance POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Unity-Gain Crossover Phase Margin −3 dB Closed-Loop Bandwidth NOISE PERFORMANCE Voltage Noise Voltage Noise Density Current Noise Density ISC ZOUT PSRR ISY 55 75 SR GBP UGC ΦM −3 dB en p-p en in 0.3 595 550 52 114 0.7 27 0.2 Rev. 0 | Page 4 of 20 ADA4096-2 ELECTRICAL SPECIFICATIONS, VSY = ±15 V VSY = ±15.0 V, VCM = VSY/2, VO = 0.0 V, TA = 25°C, unless otherwise noted. Table 4. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Symbol VOS −40°C ≤ TA ≤ +125°C ∆VOS/∆T IB −40°C ≤ TA ≤ +125°C IOS −40°C ≤ TA ≤ +125°C CMRR VCM = −15 V to +15 V −40°C ≤ TA ≤ +125°C VCM = −13 V to +13 V −40°C ≤ TA ≤ +125°C RL = 10 kΩ, VO = ±14.7 V −40°C ≤ TA ≤ +125°C RL = 2 kΩ, VO = ±11 V −40°C ≤ TA ≤ +125°C −15 82 75 95 89 110 105 100 90 95 107 120 112 ±0.1 1 ±3 Test Conditions/Comments Min Typ 35 Max 300 500 ±10 ±15 ±1.5 ±3 +15 Unit μV μV μV/°C nA nA nA nA V dB dB dB dB dB dB dB dB pF pF 300 μV V V V V V V V V mA Ω dB dB μA μA V/μs μs kHz kHz Degrees kHz dB Large Signal Voltage Gain AVO Input Capacitance Differential Mode Common Mode MATCHING CHARACTERISTICS Offset Voltage OUTPUT CHARACTERISTICS Output Voltage High CDM CCM TA = 25°C VOH RL = 10 kΩ to GND −40°C ≤ TA ≤ +125°C RL = 2 kΩ to GND −40°C ≤ TA ≤ +125°C RL = 10 kΩ to GND −40°C ≤ TA ≤ +125°C RL = 2 kΩ to GND −40°C ≤ TA ≤ +125°C Source/sink f = 100 kHz, AV = 1 VSY = 3 V to 36 V −40°C ≤ TA ≤ +125°C VO = VSY/2 −40°C ≤ TA ≤ +125°C RL = 100 kΩ, CL = 30 pF To 0.1%, 10 V step VIN = 5 mV p-p, RL = 10 kΩ, AV = 100 VIN = 5 mV p-p, RL = 10 kΩ, AV = 1 AV = 1, VIN = 5 mV p-p f = 1 kHz 14.92 14.90 14.0 12.0 2.5 7 100 14.94 14.3 −14.96 −14.75 ±10 40 100 90 60 75 100 −14.80 −14.75 −14.65 −14.0 Output Voltage Low VOL Short-Circuit Limit Closed-Loop Impedance POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time Gain Bandwidth Product Unity-Gain Crossover Phase Margin −3 dB Closed-Loop Bandwidth Channel Separation ISC ZOUT PSRR ISY SR tS GBP UGC ΦM −3 dB CS 0.4 23.4 786 800 60 152 100 Rev. 0 | Page 5 of 20 ADA4096-2 Parameter NOISE PERFORMANCE Voltage Noise Voltage Noise Density Current Noise Density Symbol en p-p en in Test Conditions/Comments 0.1 Hz to 10 Hz f = 1 kHz f = 1 kHz Min Typ 0.7 27 0.2 Max Unit μV p-p nV/√Hz pA/√Hz Rev. 0 | Page 6 of 20 ADA4096-2 ABSOLUTE MAXIMUM RATINGS Table 5. Parameter Supply Voltage Input Voltage Operating Condition Overvoltage Condition1 Differential Input Voltage2 Input Current Output Short-Circuit Duration to GND Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) 1 2 THERMAL RESISTANCE Rating 36 V −V ≤ VIN ≤ +V (−V) − 32 V ≤ VIN ≤ (+V) + 32 V ±VSY ±5 mA Indefinite −65°C to +150°C −40°C to +125°C −65°C to +150°C 300°C θJA is specified for the device soldered on a 4-layer JEDEC standard printed circuit board (PCB) with zero airflow. The exposed pad is soldered to the application board. Table 6. Thermal Resistance Package Type 8-Lead MSOP (RM-8) 8-Lead LFCSP (CP-8-10) θJA 142 76 θJC 45 43 Unit °C/W °C/W ESD CAUTION Performance not guaranteed during overvoltage conditions. Limit the input current to ±5 mA. 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. 0 | Page 7 of 20 ADA4096-2 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. ±1.5 V CHARACTERISTICS 180 160 140 120 100 80 60 40 20 09241-006 ADA4096-2 VSY = ±1.5V TA = 25°C 10k ADA4096-2 VSY = ±1.5V TA = 25°C NUMBER OF AMPLIFIERS 1k VOUT TO RAIL (mV) 100 SOURCING 10 SINKING MORE 0 25 50 –75 –50 –25 75 100 125 150 175 –200 –175 –150 –125 –100 200 0 09241-003 1 0.001 0.01 0.1 1 10 100 VOS (µV) LOAD CURRENT (mA) Figure 3. Input Offset Voltage Distribution 25 Figure 6. Dropout Voltage vs. Load Current 140 120 100 PHASE 80 200 ADA4096-2 VSY = ±1.5V TA = –40°C TO +125°C ADA4096-2 VSY = ±1.5V TA = 25°C 20 NUMBER OF AMPLIFIERS 150 GAIN (dB) 15 60 40 GAIN 20 0 0 50 10 5 –20 –40 1k 10k 100k 1M –50 09241-004 0 0.5 1.0 1.5 2.0 2.5 TCVOS (µV/°C) FREQUENCY (Hz) Figure 4. Offset Voltage Drift Distribution 30 20 10 TA = +25°C TA = +125°C TA = +85°C –10 TA = 0°C –20 –30 –40 –1.5 TA = –40°C –1.0 –0.5 0 VCM (V) 0.5 1.0 1.5 09241-005 Figure 7. Open-Loop Gain and Phase vs. Frequency 50 40 30 CLOSED-LOOP GAIN (dB) ADA4096-2 VSY = ±1.5V G = +100 ADA4096-2 VSY = ±1.5V TA = 25°C 20 10 0 –10 –20 –30 –40 G = +10 IB (nA) 0 G = +1 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 5. Input Bias Current vs. VCM and Temperature Figure 8. Closed-Loop Gain vs. Frequency Rev. 0 | Page 8 of 20 09241-008 –50 10 09241-007 0 –2.5 –2.0 –1.5 –1.0 –0.5 –60 100 –100 10M PHASE (Degrees) 100 ADA4096-2 10k ADA4096-2 VSY = ±1.5V TA = 25°C 0.08 0.06 0.04 100 ZOUT (Ω) 1k 0.02 VOUT (V) ADA4096-2 VSY = ±1.5V TA = 25°C RL = 10kΩ CL = 100pF G = +1 G = +100 10 G = +10 1 G = +1 0.1 0 –0.02 –0.04 –0.06 –0.08 09241-009 100 1k 10k 100k 1M 10M 0 5 10 15 TIME (µs) 20 25 30 FREQUENCY (Hz) Figure 9. Output Impedance vs. Frequency 120 100 80 PSRR+ PSRR (dB) Figure 12. Small Signal Transient Response 1.6 1.4 1.2 1.0 VOUT (V) ADA4096-2 VSY = ±1.5V TA = 25°C ADA4096-2 VSY = ±1.5V TA = 25°C RF = 10kΩ RS = 100Ω 60 PSRR– 40 20 0 –20 10 0.8 0.6 0.4 0.2 09241-052 100 1k 10k 100k 1M 10M 0 20 40 TIME (µs) 60 80 100 FREQUENCY (Hz) Figure 10. PSRR vs. Frequency 2.0 1.5 1.0 0.5 VOUT (V) VOUT (V) Figure 13. Positive Overload Recovery 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 –1.2 –1.4 09241-010 09241-056 ADA4096-2 VSY = ±1.5V TA = 25°C RL = 10kΩ CL = 100pF G = +1 ADA4096-2 VSY = ±1.5V TA = 25°C RF = 10kΩ RS = 100Ω 0 –0.5 –1.0 –1.5 –2.0 0 20 40 60 TIME (µs) 80 100 120 –1.6 0 20 40 TIME (µs) 60 80 100 Figure 11. Large Signal Transient Response Figure 14. Negative Overload Recovery Rev. 0 | Page 9 of 20 09241-055 0 09241-011 0.01 10 –0.10 ADA4096-2 ±5 V CHARACTERISTICS 250 ADA4096-2 VSY = ±5V TA = 25°C 10k ADA4096-2 VSY = ±5V TA = 25°C 200 NUMBER OF AMPLIFIERS 1k 150 VOUT TO RAIL (mV) 100 SOURCING 10 SINKING 100 50 MORE 09241-015 0.01 0.1 1 10 100 VOS (µV) LOAD CURRENT (mA) Figure 15. Input Offset Voltage Distribution 40 140 120 100 Figure 18. Dropout Voltage vs. Load Current 200 ADA4096-2 VSY = ±5V 35 T = –40°C TO +125°C A NUMBER OF AMPLIFIERS 30 ADA4096-2 VSY = ±5V TA = 25°C PHASE 150 80 25 20 15 10 GAIN (dB) 60 40 GAIN 20 0 –20 0 50 5 0 –2.5 –2.0 –1.5 –1.0 –0.5 –50 –40 09241-016 0 0.5 1.0 1.5 2.0 2.5 1k 10k 100k 1M TCVOS (µV/°C) FREQUENCY (Hz) Figure 16. Offset Voltage Drift Distribution 30 20 10 TA = +125°C 0 TA = +85°C 50 40 30 Figure 19. Open-Loop Gain and Phase vs. Frequency ADA4096-2 VSY = ±5V G = +100 ADA4096-2 VSY = ±5V TA = 25°C CLOSED-LOOP GAIN (dB) 20 10 0 –10 –20 –30 –40 G = +10 IB (nA) –10 –20 –30 –40 TA = –40°C 09241-050 G = +1 TA = +25°C TA = 0°C –4 –3 –2 –1 0 VCM (V) 1 2 3 4 5 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 17. Input Bias Current vs. VCM and Temperature Figure 20. Closed-Loop Gain vs. Frequency Rev. 0 | Page 10 of 20 09241-024 –50 –5 –50 10 09241-020 –60 100 –100 10M PHASE (Degrees) 100 09241-023 0 25 50 –75 –50 –25 75 100 125 150 175 –200 –175 –150 –125 –100 200 0 1 0.001 ADA4096-2 10k ADA4096-2 VSY = ±5V TA = 25°C 0.08 0.06 0.04 100 0.02 ADA4096-2 VSY = ±5V TA = 25°C RL = 10kΩ CL = 100pF G = +1 1k ZOUT (Ω) VOUT (V) G = +1 09241-021 G = +100 10 G = +10 1 0 –0.02 –0.04 –0.06 –0.08 09241-018 09241-058 09241-057 0.1 0.01 10 100 1k 10k 100k 1M 10M –0.10 0 5 10 15 TIME (µs) 20 25 30 FREQUENCY (Hz) Figure 21. Output Impedance vs. Frequency 140 120 100 80 60 PSRR– 40 20 0 09241-053 Figure 24. Small Signal Transient Response 6 ADA4096-2 VSY = ±5V TA = 25°C 5 ADA4096-2 VSY = ±5V TA = 25°C RF = 10kΩ RS = 100Ω 4 PSRR (dB) VOUT (V) 1M 10M PSRR+ 3 2 1 –20 10 100 1k 10k 100k 0 0 20 40 TIME (µs) 60 80 100 FREQUENCY (Hz) Figure 22. PSRR vs. Frequency 6 1 Figure 25. Positive Overload Recovery 4 2 VOUT (V) ADA4096-2 VSY = ±5V TA = 25°C RL = 10kΩ CL = 100pF G = +1 VOUT (V) 0 ADA4096-2 VSY = ±5V TA = 25°C RF = 10kΩ RS = 100Ω –1 0 –2 –2 –3 –4 –4 0 50 100 150 200 TIME (µs) 250 300 350 400 09241-017 –6 –5 0 20 40 TIME (µs) 60 80 100 Figure 23. Large Signal Transient Response Figure 26. Negative Overload Recovery Rev. 0 | Page 11 of 20 ADA4096-2 ±15 V CHARACTERISTICS 250 ADA4096-2 VSY = ±15V TA = 25°C 10k ADA4096-2 VSY = ±15V TA = 25°C 200 NUMBER OF AMPLIFIERS 1k 150 VOUT TO RAIL (mV) 100 100 SOURCING 10 SINKING 50 MORE 09241-027 0.01 0.1 1 10 100 VOS (µV) LOAD CURRENT (mA) Figure 27. Input Offset Voltage Distribution 35 140 120 100 80 Figure 30. Dropout Voltage vs. Load Current 200 ADA4096-2 VSY = ±15V 30 TA = –40°C TO +125°C NUMBER OF AMPLIFIERS 25 20 15 10 5 0 –2.5 –2.0 –1.5 –1.0 –0.5 GAIN (dB) ADA4096-2 VSY = ±15V TA = 25°C PHASE 150 60 40 GAIN 20 0 –20 –40 1k 10k 100k 1M 0 50 –50 09241-028 0 0.5 1.0 1.5 2.0 2.5 TCVOS (µV/°C) FREQUENCY (Hz) Figure 28. Offset Voltage Drift Distribution 40 50 40 TA = +125°C 30 20 10 0 –10 –20 –30 09241-051 Figure 31. Open-Loop Gain and Phase vs. Frequency ADA4096-2 30 VSY = ±15V 20 G = +100 ADA4096-2 VSY = ±15V TA = 25°C CLOSED-LOOP GAIN (dB) 10 0 TA = +85°C G = +10 IB (nA) –10 –20 –30 –40 –50 –60 –15 TA = –40°C –10 –5 0 VCM (V) 5 10 15 TA = 0°C TA = +25°C G = +1 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 29. Input Bias Current vs. VCM and Temperature Figure 32. Closed-Loop Gain vs. Frequency Rev. 0 | Page 12 of 20 09241-036 –40 10 09241-030 –60 100 –100 10M PHASE (Degrees) 100 09241-034 0 25 50 –75 –50 –25 75 100 125 150 175 –200 –175 –150 –125 –100 200 0 1 0.001 ADA4096-2 10k ADA4096-2 VSY = ±15V TA = 25°C 0.08 0.06 0.04 100 0.02 ADA4096-2 VSY = ±15V TA = 25°C RL = 10kΩ CL = 100pF G = +1 1k ZOUT (Ω) VOUT (V) G = +1 09241-035 0 –0.02 –0.04 –0.06 –0.08 09241-032 09241-060 09241-059 10 G = +100 G = +10 1 0.1 0.01 10 100 1k 10k 100k 1M 10M –0.10 0 5 10 15 TIME (µs) 20 25 30 FREQUENCY (Hz) Figure 33. Output Impedance vs. Frequency 120 100 80 16 ADA4096-2 VSY = ±15V TA = 25°C 14 12 PSRR+ 10 Figure 36. Small Signal Transient Response ADA4096-2 VSY = ±15V TA = 25°C RF = 10kΩ RS = 100Ω PSRR (dB) VOUT (V) 09241-054 60 PSRR– 40 20 0 –20 10 8 6 4 2 0 100 1k 10k 100k 1M 10M 0 20 40 TIME (µs) 60 80 100 FREQUENCY (Hz) Figure 34. PSRR vs. Frequency 15 0 –2 –4 –6 Figure 37. Positive Overload Recovery 10 5 VOUT (V) ADA4096-2 VSY = ±15V TA = 25°C RL = 10kΩ CL = 100pF G = +1 VOUT (V) ADA4096-2 VSY = ±15V TA = 25°C RF = 10kΩ RS = 100Ω 0 –8 –10 –12 –5 –10 –14 09241-031 –15 0 50 100 150 200 TIME (µs) 250 300 350 400 –16 0 20 40 TIME (µs) 60 80 100 Figure 35. Large Signal Transient Response Figure 38. Negative Overload Recovery Rev. 0 | Page 13 of 20 ADA4096-2 COMPARATIVE VOLTAGE AND VARIABLE VOLTAGE GRAPHS 0.5 0.4 0.3 0.2 ADA4096-2 VSY = ±15V TA = 25°C 70 ADA4096-2 TA = 25°C RL = ∞ SUPPLY CURRENT PER AMPLIFIER (µA) 09241-039 60 50 40 30 20 10 0 NOISE (µV) 0.1 0 –0.1 –0.2 –0.3 –0.4 –10 –8 –6 –4 –2 0 TIME (s) 2 4 6 8 10 0 4 8 12 16 20 24 28 32 36 SUPPLY VOLTAGE (V) Figure 39. Input Voltage Noise, 0.1 Hz to 10 Hz Bandwidth –80 Figure 42. Supply Current vs. Supply Voltage 100 –90 ADA4096-2 VSY = ±15V TA = 25°C ADA4096-2 VSY = ±15V TA = 25°C CHANNEL SEPARATION (dB) –100 –110 10kΩ 1kΩ 2kΩ VIN = 10V p-p 09241-040 –120 –130 en (nV/ Hz) 100 1k FREQUENCY (Hz) 10k 50k 1 10 FREQUENCY (Hz) 100 1k Figure 40. Channel Separation vs. Frequency 120 110 100 90 VSY = ±15V VSY = ±1.5V VSY = ±5V Figure 43. Voltage Noise Density 50 ADA4096-2 TA = 25°C 40 ADA4096-2 VSY = ±15V TA = 25°C RL = 2kΩ G = +1 VIN = 100mV p-p CMRR (dB) 80 70 60 50 40 30 OVERSHOOT (%) 30 20 OS– 10 OS+ 09241-041 1k 10k 100k 1M 10M 0.1 CLOAD (nF) 1 FREQUENCY (Hz) Figure 41. CMRR vs. Frequency Figure 44. Overshoot vs. Load Capacitance Rev. 0 | Page 14 of 20 09241-100 20 100 0 0.01 09241-044 –140 20 10 0.1 09241-043 ADA4096-2 THEORY OF OPERATION INPUT STAGE VCC R1 I1 R2 D6 Q5 D3 D4 Q3 Q4 Q13 Q7 Q8 C1 Q9 Q10 Q6 Q11 Q12 C2 Q14 D8 ×1 +IN –IN VEE OVP D2 OVP D1 R3 Q1 Q2 I2 R4 Q15 D7 Q16 09241-045 R5 R7 I3 D10 Q20 D9 Q18 OUT Q17 Q19 R6 D11 Figure 45. Simplified Schematic Figure 45 shows a simplified schematic of the ADA4096-2. The input stage comprises two differential pairs (Q1 to Q4 and Q5 to Q8) operating in parallel. When the input common-mode voltage approaches VCC − 1.5 V, Q1 to Q4 shut down as I1 reaches its minimum voltage compliance. Conversely, when the input common-mode voltage approaches VEE + 1.5 V, Q5 to Q8 shut down as I2 reaches its minimum voltage compliance. This topology allows for maximum input dynamic range because the amplifier can function with its inputs at 200 mV outside the rail (at room temperature). As with any rail-to-rail input amplifier, VOS mismatch between the two input pairs determines the CMRR of the amplifier. If the input common-mode voltage range is kept within 1.5 V of each rail, transitions between the input pairs are avoided, thus improving the CMRR by approximately 10 dB (see Table 3 and Table 4). Although phase inversion persists for only as long as the inputs are saturated, it can be detrimental to applications where the amplifier is part of a closed-loop system. The ADA4096-2 is free from phase inversion over the entire common-mode voltage range, as well as the overvoltage protected range stated in the Absolute Maximum Ratings section, Table 5. Figure 46 shows the ADA4096-2 in a unity-gain configuration with the input signal at ±40 V and the amplifier supplies at ±10 V. T 1 PHASE INVERSION Some single-supply amplifiers exhibit phase inversion when the input signal extends beyond the common-mode voltage range of the amplifier. When the input devices become saturated, the inverting and noninverting inputs exchange functions, causing the output to move in the opposing direction. CH1 10.0V CH2 10.0V M2.00ms T 34.20% A CH1 –3.6V Figure 46. No Phase Reversal Rev. 0 | Page 15 of 20 09241-046 ADA4096-2 INPUT OVERVOLTAGE PROTECTION The ADA4096-2 inputs are protected from input voltage excursions up to 32 V outside each rail. This feature is of particular importance in applications with power supply sequencing issues that could cause the signal source to be active before the supplies to the amplifier. Figure 47 shows the input current limiting capability of the ADA4096-2 (green curves) compared to using a 5 kΩ series resistor (red curves). VEE = 0V 6 5 4 3 2 1 0 –1 –2 –3 –4 –5 –6 –7 –48 –40 –32 –24 –16 –8 0 VIN (V) LOW RDSON SERIES FET 5kΩ SERIES RESISTOR 8 16 24 32 40 48 09241-047 Figure 47 was generated with the ADA4096-2 in a buffer configuration with the supplies connected to GND (or ±15 V) and the positive input swept until it exceeds the supplies by 32 V. In general, input current is limited to 1 mA during positive overvoltage conditions and 200 μA during negative undervoltage conditions. For example, at an overvoltage of 20 V, the ADA4096-2 input current is limited to 1 mA, providing a current limit equivalent to a series 20 kΩ resistor. Figure 47 also shows that the current limiting circuitry is active whether the amplifier is powered or not. Note that Figure 47 represents input protection under abnormal conditions only. The correct amplifier operation input voltage range (IVR) is specified in Table 2 to Table 4. INPUT BIAS CURRENT (mA) Figure 47. Input Current Limiting Capability VCC = +15V VEE = –15V 7 Rev. 0 | Page 16 of 20 ADA4096-2 COMPARATOR OPERATION Although op amps are quite different from comparators, occasionally an unused section of a dual or a quad op amp may be pressed into service as a comparator; however, this is not recommended for any rail-to-rail output op amps. For railto-rail output op amps, the output stage is generally a ratioed current mirror with bipolar or MOSFET transistors. With the part operating open loop, the second stage increases the current drive to the ratioed mirror to close the loop, but it cannot, which results in an increase in supply current. With the op amp configured as a comparator, the supply current can be significantly higher (see Figure 48). SUPPLY CURRENT PER AMPLIFIER (µA) 500 400 VOUT = HIGH 300 200 VOUT = LOW 100 BUFFER 0 0 4 8 12 16 20 24 28 32 36 SUPPLY VOLTAGE (V) Figure 48. Comparator Supply Current Rev. 0 | Page 17 of 20 09241-048 ADA4096-2 OUTLINE DIMENSIONS 3.20 3.00 2.80 3.20 3.00 2.80 PIN 1 IDENTIFIER 8 5 1 5.15 4.90 4.65 4 0.65 BSC 0.95 0.85 0.75 0.15 0.05 COPLANARITY 0.10 0.40 0.25 15° MAX 1.10 MAX 0.23 0.09 0.80 0.55 0.40 10-07-2009-B 6° 0° COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 49. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters 2.00 BSC SQ 5 1.70 1.60 1.50 0.50 BSC 8 PIN 1 INDEX AREA 0.425 0.350 0.275 4 TOP VIEW EXPOSED PAD 1.10 1.00 0.90 1 BOTTOM VIEW PIN 1 INDICATOR (R 0.15) 0.60 0.55 0.50 SEATING PLANE 0.30 0.25 0.20 0.05 MAX 0.02 NOM FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. 063009-A 0.20 REF Figure 50. 8-Lead Lead Frame Chip Scale Package [LFCSP_UD] 2 mm × 2 mm Body, Ultra Thin, Dual Lead (CP-8-10) Dimensions shown in millimeters Rev. 0 | Page 18 of 20 ADA4096-2 ORDERING GUIDE Model 1, 2 ADA4096-2ARMZ ADA4096-2ARMZ-R7 ADA4096-2ARMZ-RL ADA4096-2ACPZ-R7 ADA4096-2ACPZ-RL ADA4096-2WARMZ-R7 ADA4096-2WARMZ-RL 1 2 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 −40°C to +125°C Package Description 8-Lead Mini Small Outline Package [MSOP] 8-Lead Mini Small Outline Package [MSOP] 8-Lead Mini Small Outline Package [MSOP] 8-Lead Frame Chip Scale Package [LFCSP_UD] 8-Lead Frame Chip Scale Package [LFCSP_UD] 8-Lead Mini Small Outline Package [MSOP] 8-Lead Mini Small Outline Package [MSOP] Package Option RM-8 RM-8 RM-8 CP-8-10 CP-8-10 RM-8 RM-8 Branding A2T A2T A2T A4 A4 A2T A2T Z = RoHS Compliant Part. W = Qualified for Automotive Applications. AUTOMOTIVE PRODUCTS The ADA4096-2W models are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. Note that these automotive models may have specifications that differ from the commercial models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these models. Rev. 0 | Page 19 of 20 ADA4096-2 NOTES ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09241-0-7/11(0) Rev. 0 | Page 20 of 20