ANALOG DEVICES AD8676

Ultraprecision, 36 V, 2.8 nV/√Hz Dual Rail-to-Rail Output Op Amp Data Sheet AD8676 FEATURES PIN CONFIGURATIONS Very low voltage noise 2.8 nV/√Hz @ 1 kHz OUT A 1 8 V+ Rail-to-rail output swing AD8676 –IN A 2 7 OUT B Low input bias current: 2 nA maximum +IN A 3 6 –IN B TOP VIEW (Not to Scale) Very low offset voltage: 12 μV typical V– 4 5 +IN B Low input offset drift: 0.6 μV/°C maximum Figure 1. 8-Lead SOIC_N (R-8) Very high gain: 120 dB Wide bandwidth: 10 MHz typical OUT A 1 8 V+ –IN A 2 7 OUT B ±5 V to ±18 V operation AD8676 +IN A 3 TOP VIEW 6 –IN B (Not to Scale) APPLICATIONS 4 5 V– +IN B Precision instrumentation Figure 2. 8-Lead MSOP (RM-8) PLL filters Laser diode control loops Strain gage amplifiers Medical instrumentation Thermocouple amplifiers GENERAL DESCRIPTION The AD8676 precision operational amplifier offers ultralow The smaller packages and low power consumption afforded by offset, drift, and voltage noise combined with very low input the AD8676 allow maximum channel density or minimum bias currents over the full operating temperature range. The board size for space-critical equipment. AD8676 is a precision, wide bandwidth op amp featuring rail- The AD8676 is specified for the extended industrial temperature to-rail output swings and very low noise. Operation is fully range (−40°C to +125°C). The AD8676 is available in the 8-lead specified from ±5 V to ±15 V. MSOP, and the popular 8-lead, narrow SOIC; both of which are The AD8676 features a rail-to-rail output like that of the OP184, lead-free packages. MSOP packaged devices are only available in tape and reel format. but with wide bandwidth and even lower voltage noise, com- bined with the precision and low power consumption like that For the single version of this ultraprecision, rail-to-rail op amp, of the industry-standard OP07 amplifier. Unlike other low see the AD8675 data sheet. noise, rail-to-rail op amps, the AD8676 has very low input bias current and low input current noise. The AD8675 and AD8676 are members of a growing series of low noise op amps offered by Analog Devices, Inc. With typical offset voltage of only 12 μV, offset drift of 0.2 μV/°C, and noise of only 0.10 μV p-p (0.1 Hz to 10 Hz), the AD8676 is Table 1. Voltage Noise perfectly suited for applications where large error sources Package 0.9 nV 1.1 nV 1.8 nV 2.8 nV 3.8 nV cannot be tolerated. Precision instrumentation, PLL and other Single AD797 AD8597 ADA4004-1 AD8675 AD8671 precision filter circuits, position and pressure sensors, medical Dual AD8599 ADA4004-2 AD8676 AD8672 instrumentation, and strain gage amplifiers benefit greatly from Quad ADA4004-4 AD8674 the very low noise, low input bias current, and wide bandwidth. Many systems can take advantage of the low noise, dc precision, and rail-to-rail output swing provided by the AD8676 to maxi- mize SNR and dynamic range. Rev. C 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com 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. Fax: 781.461.3113 ©2006–2011 Analog Devices, Inc. All rights reserved. 06487-002 06487-001 AD8676 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1  Absolute Maximum Ratings ............................................................5  Applications ....................................................................................... 1  Thermal Resistance .......................................................................5  Pin Configurations ........................................................................... 1  Power Sequencing .........................................................................5  General Description ......................................................................... 1  ESD Caution...................................................................................5  Revision History ............................................................................... 2  Typical Performance Characteristics ..............................................6  Specif ica t ions ..................................................................................... 3  Outline Dimensions ....................................................................... 11  Electrical Specifications ............................................................... 3  Ordering Guide .......................................................................... 11  REVISION HISTORY 8/11—Rev. B to Rev. C 4/08—Rev. 0 to Rev. A Change to Y-Axis Label, Figure 9 ................................................... 7 Changes to Table 1 ............................................................................. 3 Changes to Table 2 ............................................................................. 4 11/09—Rev. A to Rev. B Changes to Figure 6, Figure 7, Figure 8 .......................................... 6 Changes to General Description Section ...................................... 1 Changes to Figure 9 through Figure 12 .......................................... 7 Added Table 1; Renumbered Sequentially .................................... 1 Changes to Figure 21, Figure 22, and Figure 25 ............................ 9 Updated Outline Dimensions ....................................................... 11 Added Figure 26, Renumbered Sequentially ................................. 9 Changes to Ordering Guide .......................................................... 11 Changes to Figure 27 ...................................................................... 10 Added Figure 28, Renumbered Sequentially .............................. 10 10/06—Revision 0: Initial Version Rev. C | Page 2 of 12 Data Sheet AD8676 SPECIFICATIONS ELECTRICAL SPECIFICATIONS V = ±5.0 V, V = 0 V, V = 0 V, T = +25°C, unless otherwise specified. S CM O A Table 2. Parameter Symbol Conditions Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage V OS B Grade (SOIC) 12 50 μV B Grade (MSOP) 60 μV A Grade (SOIC, MSOP) 100 μV Offset Voltage VOS −40°C ≤ TA ≤ +125°C B Grade (SOIC, MSOP) 15 160 μV A Grade (SOIC, MSOP) 250 μV Input Bias Current I −2 +2 nA B −40°C ≤ T ≤ +125°C −5.5 +5.5 nA A Input Offset Current IOS −1 +1 nA −40°C ≤ TA ≤ +125°C −2.8 +2.8 nA Input Voltage Range −3.0 +3.0 V Common-Mode Rejection Ratio CMRR V = −3.0 V to +3.0 V 105 130 dB CM −40°C ≤ T ≤ +125°C 105 dB A Open-Loop Gain AVO RL = 2 kΩ to ground, 120 126 dB VO = −3.5 V to +3.5 V −40°C ≤ TA ≤ +125°C 117 dB Offset Voltage Drift ΔV/ΔT −40°C ≤ T ≤ +125°C 0.2 0.6 μV/°C OS A OUTPUT CHARACTERISTICS Output Voltage High VOH RL = 10 kΩ to ground +4.90 +4.95 V −40°C ≤ T ≤ +125°C +4.85 V A R = 2 kΩ to ground +4.80 +4.89 V L −40°C ≤ T ≤ +125°C +4.75 V A Output Voltage Low VOL RL = 10 kΩ to ground −4.98 −4.90 V −40°C ≤ TA ≤ +125°C −4.85 V RL = 2 kΩ to ground −4.91 −4.86 V −40°C ≤ T ≤ +125°C −4.82 V A Short-Circuit Limit I +40 mA SC Output Current IO ±20 mA POWER SUPPLY Power Supply Rejection Ratio PSRR V = ±5.0 V to ±15.0 V 106 120 dB S −40°C ≤ TA ≤ +125°C 106 120 dB Supply Current/Amplifier ISY VO = 0 V 2.5 3.2 mA −40°C ≤ TA ≤ +125°C 3.8 mA DYNAMIC PERFORMANCE Slew Rate SR RL = 2 kΩ 2.5 V/μs Gain Bandwidth Product GBP 10 MHz NOISE PERFORMANCE Voltage Noise en p-p 0.1 Hz to 10 Hz 0.1 μV p-p Voltage Noise Density e f = 1 kHz 2.8 nV/√Hz n Current Noise Density i f = 10 Hz 0.3 pA/√Hz n Rev. C | Page 3 of 12 AD8676 Data Sheet V = ±15 V, V = 0 V, V = 0 V, T = +25°C, unless otherwise specified. S CM O A Table 3. Parameter Symbol Conditions Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage V OS B Grade (SOIC) 12 50 μV B Grade (MSOP) 60 μV A Grade (SOIC, MSOP) 100 μV Offset Voltage VOS −40°C ≤ TA ≤ +125°C B Grade (SOIC, MSOP) 15 160 μV A Grade (SOIC, MSOP) 250 μV Input Bias Current I −2 +2 nA B −40°C ≤ T ≤ +125°C −4.5 +4.5 nA A Input Offset Current IOS −1 +1 nA −40°C ≤ TA ≤ +125°C −2.8 +2.8 nA Input Voltage Range −12.5 +12.5 V Common-Mode Rejection Ratio CMRR V = −12.5 V to +12.5 V 111 130 dB CM −40°C ≤ T ≤ +125°C 107 130 dB A Open-Loop Gain AVO RL = 2 kΩ to ground, 123 132 dB VO = −13.5 V to +13.5 V −40°C ≤ TA ≤ +125°C 117 dB Offset Voltage Drift ΔV/ΔT −40°C ≤ T ≤ +125°C 0.2 0.6 μV/°C OS A OUTPUT CHARACTERISTICS Output Voltage High VOH RL = 10 kΩ to ground +14.85 +14.92 V −40°C ≤ T ≤ +125°C +14.80 V A R = 2 kΩ to ground +14.60 +14.75 V L −40°C ≤ T ≤ +125°C +14.40 V A Output Voltage Low VOL RL = 10 kΩ to ground −14.96 −14.94 V −40°C ≤ TA ≤ +125°C −14.90 V RL = 2 kΩ to ground −14.85 −14.75 V −40°C ≤ T ≤ +125°C −14.60 V A Short-Circuit Limit I +40 mA SC Output Current IO ±20 mA POWER SUPPLY Power Supply Rejection Ratio PSRR V = ±5.0 V to ±15.0 V 106 120 dB S −40°C ≤ TA ≤ +125°C 106 dB Supply Current/Amplifier ISY VO = 0 V 2.7 3.4 mA −40°C ≤ TA ≤ +125°C 4.2 mA DYNAMIC PERFORMANCE Slew Rate SR RL =10 kΩ 2.5 V/μs Gain Bandwidth Product GBP 10 MHz NOISE PERFORMANCE Voltage Noise en p-p 0.1 Hz to 10 Hz 0.1 μV p-p Voltage Noise Density e f = 1 kHz 2.8 nV/√Hz n Current Noise Density i f = 10 Hz 0.3 pA/√Hz n Rev. C | Page 4 of 12 Data Sheet AD8676 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 4. Parameter Rating Table 5. Thermal Resistance Supply Voltage ±18 V Package Type θ θ Unit JA JC Input Voltage ±V supply 8-Lead MSOP (RM) 210 45 °C/W Differential Input Voltage ±0.7 V 8-Lead SOIC_N (R) 158 43 °C/W Output Short-Circuit Duration to GND Indefinite Storage Temperature Range RM, R Packages −65°C to +150°C POWER SEQUENCING Operating Temperature Range −40°C to +125°C The op amp supplies must be established simultaneously with, Junction Temperature Range or before, any input signals are applied. If this is not possible, RM, R Packages −65°C to +150°C the input current must be limited to 10 mA. Lead Temperature Range (Soldering, 10 sec) 300°C ESD CAUTION 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. C | Page 5 of 12 AD8676 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS ±15 V and ±5 V, TA = 25°C, unless otherwise specified. 10 150 V = ±15V S 9 100 8 7 50 6 TYPICAL 5 0 4 –50 3 2 –100 1 0 –150 1 10 100 1k 10k 100k –40 –20 0 20 40 60 80 100 120 FREQUENCY (Hz) TEMPERATURE (°C) Figure 3. Voltage Noise Density vs. Frequency Figure 6. Offset Voltage vs. Temperature 90 350 80 300 70 250 60 200 50 40 150 30 10 20 50 10 0 0 –100 –80 –60 –40 –20 0 20 40 60 80 100 –2.0 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0 V (µV) OS I (nA) B Figure 4. Input Offset Voltage Distribution Figure 7. Input Bias Current, VSY = ±15 V 25 350 300 20 250 15 200 150 10 10 5 50 0 0 –2.0 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0 I (nA) B T V (µV/°C) C OS Figure 5. T V Distribution C OS Figure 8. Input Bias Current, V = ±5 V SY Rev. C | Page 6 of 12 VOLTAGE NOISE DENSITY (nV/ Hz) NUMBER OF AMPLIFIERS NUMBER OF AMPLIFIERS 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 06487-004 06487-005 06487-003 NUMBER OF AMPLIFIERS NUMBER OF AMPLIFIERS V (µV) OS 06487-108 06487-107 06487-106 Data Sheet AD8676 ±15 V and ±5 V, T = 25°C, unless otherwise specified. A 120 180 5 R = 2kΩ L 100 GAIN 4 C = 35pF L 135 θ = 55.2° M 80 3 90 60 2 PHASE 40 45 1 20 0 V = ±5V 0 0 S –20 –1 –45 V = ±15V S –40 –2 –90 –60 –3 –80 –135 –4 –100 –5 –120 –180 –40 –20 0 20 40 60 80 100 120 100 1k 10k 100k 1M 10M 100M TEMPERATURE (°C) FREQUENCY (Hz) Figure 9. Input Bias Current vs. Temperature Figure 12. Gain and Phase vs. Frequency 3.0 60 50 2.5 40 G = 100 30 2.0 20 G = 10 1.5 10 0 G = 1 1.0 –10 –20 0.5 –30 –40 0 1k 10k 100k 1M 10M 5 10 15 20 25 30 35 100M FREQUENCY (Hz) SUPPLY VOLTAGE (V) Figure 10. Supply Current vs. Total Supply Voltage Figure 13. Closed-Loop Gain vs. Frequency 4.0 70 3.5 60 V = ±15V S 3.0 50 2.5 A = 100 VO V = ±5V 40 S 2.0 30 A = 10 VO 1.5 20 1.0 A = 1 VO 10 0.5 0 0 –40 –20 0 20 40 60 80 100 120 1k 10k 100k 1M 10M 100M TEMPERATURE (°C) FREQUENCY (Hz) Figure 11. Supply Current vs. Temperature Figure 14. Z vs. Frequency OUT Rev. C | Page 7 of 12 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) I (nA) B 06487-110 06487-109 06487-111 GAIN (dB) Z (Ω) CLOSED-LOOP GAIN (dB) OUT 06487-014 06487-013 PHASE MARGIN (Degrees) 06487-012 AD8676 Data Sheet ±15 V and ±5 V, T = 25°C, unless otherwise specified. A 15 0.1 50 V = ±10V IN R = 2kΩ V L IN A = +1 0 40 V 10 30 –0.1 5 20 –0.2 0 10 –0.3 0 –0.4 –5 V OUT –0.5 –10 –10 V = 200mV p-p IN –20 –0.6 A = –100 VO R = 10kΩ L –15 –0.7 –30 –4 1 6 11 16 21 26 31 36 TIME (10µs/DIV) TIME (µs) Figure 15. Large Signal Transient Response, VSY = ±15 V Figure 18. Positive Overvoltage Recovery 4 0.3 50 V = ±3.5V IN V = 200mV p-p IN R = 2kΩ L A = –100 VO 3 0.2 40 A = +1 V R = 10kΩ L 2 0.1 30 V IN 1 0 20 0 –0.1 10 –1 –0.2 0 V OUT –2 –0.3 –10 –3 –0.4 –20 –4 –0.5 –30 –4 1 6 11 16 21 26 31 36 TIME (10µs/DIV) TIME (µs) Figure 16. Large Signal Transient Response, V = ±5 V Figure 19. Negative Overvoltage Recovery SY 70 180 A = +1 V V = 100mV p-p 160 IN 60 140 50 120 100 40 +OS 80 30 60 –OS 40 20 20 10 0 0 –20 1 10 100 1k 10k 100k 10 100 1k 10k 100k 1M 10M 100M CAPACITANCE (pF) FREQUENCY (Hz) Figure 17. Small Signal Overshoot vs. Load Capacitance Figure 20. CMRR vs. Frequency Rev. C | Page 8 of 12 OVERSHOOT (%) VOLTAGE (V) VOLTAGE (V) 06487-015 06487-016 06487-017 INPUT VOLTAGE (V) INPUT VOLTAGE (V) CMRR (dB) 06487-020 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 06487-019 06487-018 Data Sheet AD8676 ±15 V and ±5 V, T = 25°C, unless otherwise specified. A 160 1000 140 120 SOURCE 100 100 –PSRR 80 60 +PSRR 40 10 SINK 20 0 –20 1 10 100 1k 10k 100k 1M 10M 100M 0.001 0.01 0.1 1 10 100 FREQUENCY (Hz) LOAD CURRENT (mA) Figure 21. Power Supply Rejection Ratio vs. Frequency Figure 24. Output Saturation Voltage vs. Output Load Current 126 15.0 R = 2kΩ L V = ±15V S 124 14.9 122 14.8 120 14.7 118 14.6 116 14.5 114 112 14.4 –40 –20 0 20 40 60 80 100 120 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C) TEMPERATURE (°C) Figure 22. Power Supply Rejection Ratio vs. Temperature Figure 25. High Output Voltage, VOH vs. Temperature, VS = ±15 V 0.06 5.00 R = 2kΩ L V = ±5V S 0.04 4.95 0.02 4.90 0 4.85 –0.02 4.80 –0.04 –0.06 4.75 01 237 458 6 910 –40 –20 0 20 40 60 80 100 120 TIME (s) TEMPERATURE (°C) Figure 23. Voltage Noise (0.1 Hz to 10 Hz) Figure 26. High Output Voltage, VOH vs. Temperature, VS = ±5 V Rev. C | Page 9 of 12 POWER SUPPLY REJECTION RATIO (dB) POWER SUPPLY REJECTION RATIO (dB) NOISE (µV) 06487-023 06487-122 06487-021 V – V (mV) S OUT HIGH OUTPUT VOLTAGE (V) HIGH OUTPUT VOLTAGE (V) 06487-225 06487-125 06487-024 AD8676 Data Sheet ±15 V and ±5 V, T = 25°C, unless otherwise specified. A –14.70 –4.93 R = 2kΩ L R = 2kΩ L V = ±15V S V = ±5V S –4.94 –14.75 –4.95 –14.80 –4.96 –14.85 –4.97 –14.90 –4.98 –14.95 –4.99 –15.00 –5.00 –40 –20 0 20 40 60 80 100 120 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C) TEMPERATURE (°C) Figure 27. Low Output Voltage, V vs. Temperature, V = ±15 V Figure 28. Low Output Voltage, V vs. Temperature, V = ±5 V OL S OL S Rev. C | Page 10 of 12 LOW OUTPUT VOLTAGE (V) 06487-126 LOW OUTPUT VOLTAGE (V) 06487-226 Data Sheet AD8676 OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 85 6.20 (0.2441) 4.00 (0.1574) 1 5.80 (0.2284) 3.80 (0.1497) 4 0.50 (0.0196) 1.27 (0.0500) 45° BSC 1.75 (0.0688) 0.25 (0.0099) 1.35 (0.0532) 0.25 (0.0098) 8° 0.10 (0.0040) 0° 0.51 (0.0201) COPLANARITY 1.27 (0.0500) 0.10 0.31 (0.0122) 0.25 (0.0098) SEATING 0.40 (0.0157) PLANE 0.17 (0.0067) COMPLIANT TO JEDEC STANDARDS MS-012-AA 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 29. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) 3.20 3.00 2.80 8 5 5.15 3.20 4.90 3.00 4.65 1 2.80 4 PIN 1 IDENTIFIER 0.65 BSC 0.95 15° MAX 0.85 1.10 MAX 0.75 0.80 0.15 0.23 6° 0.55 0.40 0.05 0.09 0° 0.40 0.25 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 30. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters ORDERING GUIDE 1 Model Temperature Range Package Description Package Option Branding AD8676ARMZ −40°C to +125°C 8-Lead Mini Small Outline Package [MSOP] RM-8 A13 AD8676ARMZ-REEL −40°C to +125°C 8-Lead Mini Small Outline Package [MSOP] RM-8 A13 AD8676ARZ −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8 AD8676ARZ-REEL −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8 AD8676ARZ-REEL7 −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8 AD8676BRMZ −40°C to +125°C 8-Lead Mini Small Outline Package [MSOP] RM-8 A1L AD8676BRMZ-REEL −40°C to +125°C 8-Lead Mini Small Outline Package [MSOP] RM-8 A1L AD8676BRZ −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8 AD8676BRZ-REEL −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8 AD8676BRZ-REEL7 −40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8 1 Z = RoHs Compliant Part. Rev. C | Page 11 of 12 100709-B 012407-A AD8676 Data Sheet NOTES ©2006–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06487-0-8/11(C) Rev. C | Page 12 of 12