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| 16 V, 250 A, Dual Precision, CMOS, Rail-to-Rail Output Operational Amplifier AD8667 FEATURES Lower power at high voltage: 180 A typical Low offset voltage: 100 V Voltage noise 21 nV/Hz at 10 kHz 23 nV/Hz at 1 kHz Low input bias current: 300 fA Single-supply operation: 5 V to 16 V Dual-supply operation: 2.5 V to 8 V Output drive: 10 mA Unity gain stable PIN CONFIGURATION OUT A 1 -IN A 2 +IN A 3 V- 4 8 V+ OUT B +IN B 06276-001 AD8667 TOP VIEW (Not to Scale) 7 6 5 -IN B Figure 1. 8-Lead MSOP, 8-Lead SOIC APPLICATIONS Medical equipment Physiological measurement Precision references Buffer/level shifting Portable operated systems High density power budget systems Multipole filters Sensors Photodiode amplification ADC drivers GENERAL DESCRIPTION The AD8667 is a dual, rail-to-rail output, single-supply/dual-supply amplifier that uses Analog Devices, Inc. patented DigiTrim(R) trimming technique to achieve low offset voltage, 300 V over the common-mode range. The AD8667 features an extended operating range with supply voltages up to 16 V for low power operation with an ISY of <325 A per amplifier over temperature. The device is designed for low noise at higher voltages: 21 nV/Hz at 10 kHz and 23 nV/Hz at 1 kHz. It also features a low input bias current of 300 fA and a 10 mA output drive. The combination of low supply currents, low offsets, very low input bias currents, and wide supply range makes the AD8667 ideal for a wide variety of low power applications. Systems utilizing dc-to-low frequency measurements or high impedance sensors, such as photodiodes, benefit from the low input bias current, low noise, low offset, and low drive current. The wide operating voltage range matches today's high performance ADCs and DACs. Medical monitoring equipment can take advantage of the low voltage noise, high input impedance, low voltage, and low current noise. The AD8667 is specified over the extended industrial temperature range of -40C to +125C. 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)2007 Analog Devices, Inc. All rights reserved. AD8667 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Pin Configuration............................................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings ............................................................5 Thermal Resistance .......................................................................5 ESD Caution...................................................................................5 Typical Performance Characteristics ..............................................6 Outline Dimensions ....................................................................... 13 Ordering Guide .......................................................................... 13 REVISION HISTORY 5/07--Revision 0: Initial Version Rev. 0 | Page 2 of 16 AD8667 SPECIFICATIONS ELECTRICAL CHARACTERISTICS VS = 5.0 V, VCM = VS/2, TA = 25C unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol VOS Test Conditions/Comments VCM = 2.5 V -40C < TA < +125C VCM = 0 V to 3.5 V -40C < TA < +85C VCM = 0.2 V to 3.5 V, -40C < TA < +125C -40C < TA < +85C -40C < TA < +125C Input Offset Current IOS -40C < TA < +85C -40C < TA < +125C -40C < TA < +85C -40C < TA < +125C VCM = 0 V to 3.5 V VCM = 0.2 V to 3.5 V, -40C < TA < +125C RL = 2 k, VO = 0.5 V to 4.5 V -40C < TA < +125C IL = 1 mA -40C < TA < +125C IL = 1 mA -40C < TA < +125C f = 100 kHz, AV = 1 VS = 5 V to 16 V -40C < TA < +125C DYNAMIC PERFORMANCE Slew Rate Settling Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Current Noise Density SR tS GBP M en p-p en in RL = 2 k To 0.1%, 0 V to 2 V step, AV = 10 0.2 12 600 60 3 21 23 0.05 95 0.2 15 50 3.5 3.5 90 90 115 1.3 4.8 4.7 150 200 6 120 105 180 Min Typ Max 100 350 300 450 450 20 150 Unit V V V V V pA pA pA pA pA pA V V dB dB dB V/C V V mV mV mA dB A A V/s s kHz Degrees V p-p nV/Hz nV/Hz pA/Hz Input Bias Current IB 70 100 100 0.3 Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Current Closed-Loop Output Impedance POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier IVR CMRR AVO VOS/T VOH VOL ISC ZOUT PSRR ISY 0 0.2 80 80 106 5 4.65 4.6 200 250 275 325 f = 0.1 Hz to 10 Hz f = 10 kHz f = 1 kHz f = 1 kHz Rev. 0 | Page 3 of 16 AD8667 VS = 16 V, VCM = VS/2, TA = 25C unless otherwise noted. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol VOS Test Conditions/Comments VCM = 8 V -40C < TA < +125C VCM = 0 V to 14.5 V -40C < TA < +85C VCM = 0.2 V to 14.5 V, -40C < TA < +125C -40C < TA < +85C -40C < TA < +125C Input Offset Current IOS -40C < TA < +85C -40C < TA < +125C -40C < TA < +85C -40C < TA < +125C VCM = 0 V to 14.5 V VCM = 0.2 V to 14.5 V, -40C < TA < +125C RL = 2 k, VO = 0.5 V to 15.5 V 0.2 25 150 14.5 14.5 100 100 124 1.2 15.9 15.1 14.8 80 600 800 50 100 105 230 Min Typ 40 70 Max 300 350 300 450 450 30 250 Unit V V V V V pA pA pA pA pA pA V V dB dB dB V/C V V V mV mV mV mA dB A A V/s s kHz Degrees V p-p nV/Hz nV/Hz pA/Hz Input Bias Current IB 0.3 Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High IVR CMRR AVO VOS/T VOH 0 0.2 90 90 112 5 Output Voltage Low VOL IL = 1 mA IL = 10 mA IL = 10 mA, -40C < TA < +125C IL = 1 mA IL = 10 mA IL = 10 mA, -40C < TA < +125C f = 100 kHz, AV = 1 VS = 5 V to 16 V, -40C < TA < +125C -40C < TA < +125C 15.8 14.8 14.65 100 720 900 Short-Circuit Current Closed-Loop Output Impedance POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Current Noise Density ISC ZOUT PSRR ISY 95 285 325 SR tS GBP M en p-p en in RL = 2 k To 0.1%, 0 V to 2 V step 0.3 12 600 60 3 23 21 0.05 f = 0.1 Hz to 10 Hz f = 1 kHz f = 10 kHz f = 1 kHz Rev. 0 | Page 4 of 16 AD8667 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit Duration to GND Storage Temperature Range Lead Temperature (Soldering, 60 sec) Operating Temperature Range Junction Temperature Range Rating 18 V -0.1 V to VS 18 V Indefinite -60C to +150C 300C -40C to +125C -65C to +150C THERMAL RESISTANCE JA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 4. Thermal Resistance Package Type 8-Lead MSOP 8-Lead SOIC JA 145 125 JC 45 43 Unit C/W C/W 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 Rev. 0 | Page 5 of 16 AD8667 TYPICAL PERFORMANCE CHARACTERISTICS Specifications at VSY = 8 V, unless otherwise noted. 1600 1400 VS = 8V 0V < VCM < 14.5V TA = 25C 100 INPUT BIAS CURRENT (pA) NUMBER OF AMPLIFIERS 1200 1000 800 600 400 200 06276-003 8V 10 1 2.5V -200 -150 -100 -50 0 50 VOS (V) 100 150 200 250 0 25 50 75 TEMPERATURE (C) 100 125 Figure 2. Input Offset Voltage Distribution 40 35 NUMBER OF AMPLIFIERS Figure 5. Input Bias Current vs. Temperature 10000 OUTPUT VOLTAGE TO SUPPLY RAIL (mV) VS = 8V -40C < TA < +125C VS = 5V TA = 25C 1000 30 25 20 15 10 5 06276-004 100 SOURCE SINK 10 1 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 TCVOS (V/C) 0.01 0.1 LOAD CURRENT (mA) 1 10 Figure 3. Input Offset Voltage Drift Distribution 300 250 200 150 100 VOS (s) Figure 6. Output Swing Saturation Voltage vs. Load Current 10000 OUTPUT VOLTAGE TO SUPPLY RAIL (mV) VS = 16V 0V < VCM < 14.5V TA = 25C VS = 16V TA = 25C 1000 50 0 -50 100 SOURCE 10 SINK -100 -150 -200 -250 06276-005 1 0 1 2 3 4 5 6 789 VCM (V) 10 11 12 13 14 15 0.01 0.1 1 LOAD CURRENT (mA) 10 100 Figure 4. Input Offset Voltage vs. Common-Mode Voltage Figure 7. Output Swing Saturation Voltage vs. Load Current Rev. 0 | Page 6 of 16 06276-008 -300 0.1 0.001 06276-007 0 0.1 0.001 06276-006 0 -250 0.1 AD8667 1200 1100 OUTPUT SATURATION VOLTAGE (mV) 1200 VDD - VOH @ 10mA V S = 16V 1000 VSY = 8V 1000 900 800 700 600 500 400 300 200 100 0 -40 -25 -10 5 VOL @ 1mA VS = 16V 20 35 50 65 TEMPERATURE (C) 80 95 110 125 VDD - VOH @ 1mA VS = 16V VDD - VOH @ 1mA VS = 5V VOL @ 1mA VS = 5V VOL @ 10mA V S = 16V ZOUT () 800 600 400 AV = 100 200 AV = 10 AV = 1 06276-009 10k 100k FREQUENCY (Hz) 1M 10M Figure 8. Output Saturation Voltage vs. Temperature 150 VS = 16V TA = 125C 100 Figure 11. Closed-Loop Output Impedance vs. Frequency 120 VS = 8V 100 50 CMRR (dB) 80 IB (pA) 0 60 -50 -100 40 06276-010 0 2 4 6 8 VCM (V) 10 12 14 16 1k 10k 100k FREQUENCY (Hz) 1M 10M Figure 9. Input Bias Current vs. Common Mode Voltage at 125C 90 70 50 PHASE PHASE (Degrees) Figure 12. CMRR vs. Frequency 100 90 135 VSY = 16V 90 PSRR- PSRR+/PSRR- CHA VS = 8V 80 70 PSRR (dB) 30 GAIN (dB) 45 60 50 40 30 20 10 PSRR+ 10 GAIN -10 -30 -50 -90 -70 10k 100k FREQUENCY (Hz) 1M -45 0 1k 10k 100k FREQUENCY (Hz) 1M 10M Figure 10. Open-Loop Gain and Phase Shift vs. Frequency Figure 13. PSRR vs. Frequency Rev. 0 | Page 7 of 16 06276-014 06276-011 -90 1k -135 10M 0 100 06276-013 -150 20 100 06276-012 0 1k AD8667 60 VSY = 8V RL = 10k 50 VOLTAGE (50mV/DIV) VSY = 8V AV = 1 CL = 200pF RL = 10k OVERSHOOT (%) 40 30 20 OS+ 10 OS- 06276-015 0 10 100 CAPACITANCE (pF) 500 TIME (2s/DIV) Figure 14. Small Signal Overshoot vs. Load Capacitance 600 Figure 17. Small Signal Transient Response 500 16V 400 VOLTAGE (2V/DIV) VSY = 8V AV = 1 CL = 200pF RL = 2k ISY (A) 5V 300 200 100 06276-019 06276-016 0 -40 -25 -10 5 20 35 50 65 TEMPERATURE (C) 80 95 110 125 TIME (20s/DIV) Figure 15. Supply Current vs. Temperature 2.0 VSY = 8V 1.5 INPUT VOLTAGE (50mV/DIV) Figure 18. Large Signal Transient Response 0.15 0.10 INPUT VOLTAGE 0.05 0 -0.05 -0.10 -0.15 OUTPUT VOLTAGE -0.20 06276-017 27 VSY = 8V AV = -100 22 17 12 7 2 -3 -8 -13 06276-020 06276-018 1.0 VOLTAGE (V/DIV) 0.5 0 -0.5 -1.0 -1.5 -2.0 0 1 2 3 4 5 6 TIME (1s/DIV) 7 8 9 10 -0.25 TIME (20s/DIV) Figure 16. 0.1 Hz to 10 Hz Input Voltage Noise Figure 19. Positive Overload Recovery Rev. 0 | Page 8 of 16 OUTPUT VOLTAGE (5V/DIV) AD8667 0.05 0 INPUT VOLTAGE (50mV/DIV) 35 30 INPUT VOLTAGE OUTPUT VOLTAGE (5V/DIV) 10k VSY = 8V -0.05 -0.10 -0.15 -0.20 -0.25 VSY = 8V AV = -100 25 20 15 10 5 1k ZOUT () AV = 100 100 AV = 10 AV = 1 10 OUTPUT VOLTAGE -0.30 -0.35 0 06276-021 TIME (20s/DIV) 1k 10k FREQUENCY (Hz) 100k 1M Figure 20. Negative Overload Recovery 1000 VSY = 8V VOLTAGE NOISE DENSITY (nV/ Hz) Figure 23. Closed-Loop Output Impedance vs. Frequency 0 20k -20 CHANNEL SEPARATION (dB) VSY = 8V 2k -40 -60 -80 -100 -120 -140 100 06276-022 1 10 FREQUENCY (Hz) 100 1000 1k FREQUENCY (Hz) 10k 100k Figure 21. Voltage Noise Density vs. Frequency 600 550 500 450 400 ISY (A) Figure 24. Channel Separation vs. Frequency +125C +85C +25C -40C 350 300 250 200 150 100 50 0 0 2 4 VS = 0V TO 8V, -40C < TA < +125C 6 8 VSY (V) 10 12 14 16 06276-023 Figure 22. Supply Current vs. Supply Voltage Rev. 0 | Page 9 of 16 06276-025 10 -160 100 06276-024 -5 1 100 AD8667 Specifications at VSY =2.5 V, unless otherwise noted. 1600 1400 VSY = 2.5V VS = +5V -0.1V < VCM < +3.5V TA = 25C 120 100 80 60 VSY = 2.5V 135 90 NUMBER OF AMPLIFIERS 1200 1000 GAIN (dB) 20 0 -20 -40 -45 0 800 600 400 200 06276-026 -60 -80 -100 -50 0 50 VOS (V) 100 150 200 250 -90 10k 100k FREQUENCY (Hz) 1M Figure 25. Input Offset Voltage Distribution 40 35 NUMBER OF AMPLIFIERS Figure 28. Open-Loop Gain and Phase Shift vs. Frequency 60 VSY = 2.5V 40 CLOSED-LOOP GAIN (dB) VSY = 2.5V -40C < TA < 125C AV = 100 30 25 20 15 10 5 06276-027 20 AV = 10 0 AV = 1 -20 0 1 2 3 TCVOS (V) 4 5 1k 10k 100k FREQUENCY (Hz) 1M 10M Figure 26. Input Offset Voltage Drift Distribution 150 100 50 0 -50 VSY = 2.5V 0V < VCM < +3.5V TA = 25C Figure 29. Closed-Loop Gain vs. Frequency 10k VSY = 2.5V 1k ZOUT () VOS (s) 100 AV = 100 AV = 10 AV = 1 -100 -150 -200 10 06276-028 0 0.5 1.0 1.5 2.0 VCM (V) 2.5 3.0 3.5 1k 10k FREQUENCY (Hz) 100k 1M Figure 27. Input Offset Voltage vs. Common-Mode Voltage Figure 30. Closed-Loop Output Impedance vs. Frequency Rev. 0 | Page 10 of 16 06276-031 1 100 06276-030 0 -40 100 06276-029 0 -250 -200 -150 -100 -120 1k -135 10M PHASE (Degrees) 40 45 AD8667 140 VSY = 2.5V 120 100 CMRR (dB) 2.0 VSY = 2.5V 1.5 1.0 VOLTAGE (V/DIV) 0.5 0 -0.5 -1.0 -1.5 80 60 40 20 06276-032 1k 10k 100k FREQUENCY (Hz) 1M 10M 0 1 2 3 4 5 6 TIME (1s/DIV) 7 8 9 10 Figure 31. CMRR vs. Frequency 100 90 80 70 PSRR (dB) VOLTAGE (50mV/DIV) Figure 34. 0.1 Hz to 10 Hz Input Voltage Noise VSY = 2.5V VSY = 2.5V AV = 1 CL = 200pF RL = 10k 60 50 40 30 PSRR+ 20 10 06276-033 PSRR- 06276-036 06276-037 0 100 1k 10k 100k FREQUENCY (Hz) 1M 10M TIME (2s/DIV) Figure 32. PSRR vs. Frequency 80 70 60 OVERSHOOT (%) Figure 35. Small Signal Transient Response VSY = 2.5V RL = 10k VOLTAGE (20mV/DIV) 50 40 30 20 OS- 10 06276-034 VSY = 2.5V AV = 1 CL = 200pF RL = 2k 0 10 OS+ 100 CAPACITANCE (pF) 500 TIME (10s/DIV) Figure 33. Small Signal Overshoot vs. Load Capacitance Figure 36. Large Signal Transient Response Rev. 0 | Page 11 of 16 06276-035 0 100 -2.0 AD8667 0.15 0.10 INPUT VOLTAGE (50mV/DIV) 4.5 VSY = 2.5V AV = -100 INPUT VOLTAGE 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 -0.5 OUTPUT VOLTAGE -1.0 -1.5 -2.0 -2.5 -3.0 TIME (20s/DIV) -3.5 1000 VSY = 2.5V VOLTAGE NOISE DENSITY (nV/ Hz) 06276-038 0.05 0 -0.05 -0.10 -0.15 -0.20 -0.25 OUTPUT VOLTAGE (1V/DIV) 100 10 1 10 FREQUENCY (Hz) 100 1k Figure 37. Positive Overload Recovery 0.05 0 INPUT VOLTAGE (50mV/DIV) Figure 39. Voltage Noise Density vs. Frequency 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 -20 CHANNEL SEPARATION (dB) OUTPUT VOLTAGE (1V/DIV) 0 20k 2k VSY = 2.5V -0.05 -0.10 -0.15 -0.20 -0.25 INPUT VOLTAGE VSY = 2.5V AV = -100 -40 -60 -80 -100 -120 -140 OUTPUT VOLTAGE -0.30 -0.35 0.5 06276-039 0 -0.5 TIME (20s/DIV) -1.0 1k FREQUENCY (Hz) 10k 100k Figure 38. Negative Overload Recovery Figure 40. Channel Separation vs. Frequency Rev. 0 | Page 12 of 16 06276-041 -160 100 06276-040 0 AD8667 OUTLINE DIMENSIONS 3.20 3.00 2.80 3.20 3.00 2.80 PIN 1 8 5 1 5.15 4.90 4.65 4 0.65 BSC 0.95 0.85 0.75 0.15 0.00 0.38 0.22 SEATING PLANE 1.10 MAX 8 0 0.80 0.60 0.40 0.23 0.08 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 41. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters 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 42. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) ORDERING GUIDE Model AD8667ARMZ-R2 1 AD8667ARMZ-REEL1 AD8667ARZ1 AD8667ARZ-REEL1 AD8667ARZ-REEL71 1 Temperature Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package Description 8-Lead Mini Small Outline Package [MSOP] 8-Lead Mini Small Outline Package [MSOP] 8-Lead Standard Small Outline Package [SOIC_N] 8-Lead Standard Small Outline Package [SOIC_N] 8-Lead Standard Small Outline Package [SOIC_N] 012407-A Package Option RM-8 RM-8 R-8 R-8 R-8 Branding A1E A1E Z = RoHS Compliant Part. Rev. 0 | Page 13 of 16 AD8667 NOTES Rev. 0 | Page 14 of 16 AD8667 NOTES Rev. 0 | Page 15 of 16 AD8667 NOTES (c)2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06276-0-5/07(0) Rev. 0 | Page 16 of 16 |
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