Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier AD8629-EP Data Sheet PIN CONFIGURATION Lowest auto-zero amplifier noise Low offset voltage: 1 V typical Input offset drift: 0.002 V/C typical Rail-to-rail input and output swing 5 V single-supply operation High gain, CMRR, and PSRR: 130 dB Very low input bias current: 100 pA maximum Low supply current: 1.0 mA Overload recovery time: 50 s No external components required ENHANCED PRODUCT FEATURES Supports defense and aerospace applications (AQEC standard) Extended temperature range: -55C to +125C Controlled manufacturing baseline One assembly/test site One fabrication site Enhanced product change notification Qualification data available on request APPLICATIONS OUT A 1 8 V+ -IN A 2 AD8629-EP 7 OUT B +IN A 3 TOP VIEW (Not to Scale) 6 -IN B 5 +IN B V- 4 12890-001 FEATURES Figure 1. 8-Lead SOIC_N (R-8) GENERAL DESCRIPTION The AD8629-EP amplifier has ultralow offset, drift, and bias current. The device is a wide bandwidth auto-zero amplifier featuring rail-to-rail input and output swing and low noise. Operation is fully specified from 2.7 V to 5 V single supply (1.35 V to 2.5 V dual supply). The AD8629-EP provides benefits previously found only in expensive auto-zeroing or chopper-stabilized amplifiers. Using Analog Devices, Inc., topology, this zero-drift amplifier combines low cost with high accuracy and low noise. No external capacitor is required. In addition, the AD8629-EP greatly reduces the digital switching noise found in most chopper-stabilized amplifiers. With an offset voltage of only 1 V, drift of less than 0.05 V/C, and noise of only 0.5 V p-p (0 Hz to 10 Hz), the AD8629-EP is suited for applications where error sources cannot be tolerated. Position and pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over the operating temperature range. Many systems can take advantage of the rail-to-rail input and output swings provided by the AD8629-EP to reduce input biasing complexity and maximize SNR. Pressure and position sensors Strain gage amplifiers Medical instrumentation Thermocouple amplifiers Precision current sensing Photodiode amplifiers The AD8629-EP is specified for the extended industrial temperature range (-55C to +125C). The AD8629-EP is available in a standard 8-lead narrow SOIC plastic package. Rev. A Document Feedback 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. 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Technical Support www.analog.com AD8629-EP Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Electrical Characteristics--VS = 2.7 V........................................4 Enhanced Product Features ............................................................ 1 Absolute Maximum Ratings ............................................................5 Applications ....................................................................................... 1 Thermal Characteristics ...............................................................5 Pin Configuration ............................................................................. 1 ESD Caution...................................................................................5 General Description ......................................................................... 1 Typical Performance Characteristics ..............................................6 Revision History ............................................................................... 2 Outline Dimensions ..........................................................................8 Specifications..................................................................................... 3 Ordering Guide .............................................................................8 Electrical Characteristics--VS = 5.0 V ....................................... 3 REVISION HISTORY 8/15--Rev. 0 to Rev. A Changes to Ordering Guide ............................................................ 8 6/15--Revision 0: Initial Version Rev. A | Page 2 of 8 Data Sheet AD8629-EP SPECIFICATIONS ELECTRICAL CHARACTERISTICS--VS = 5.0 V VS = 5.0 V, VCM = 2.5 V, TA = 25C, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Test Conditions/Comments Min VOS Typ Max Unit 1 5 15 100 1.5 200 250 5 V V pA nA pA pA V dB dB dB dB V/C -55C TA +125C Input Bias Current IB 30 -55C TA +125C Input Offset Current IOS 50 -55C TA +125C Input Voltage Range Common-Mode Rejection Ratio CMRR Large Signal Voltage Gain AVO Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High VOS/T VOH Output Voltage Low VOL Short-Circuit Limit ISC VCM = 0 V to 5 V -55C TA +125C RL = 10 k, VO = 0.3 V to 4.7 V -55C TA +125C -55C TA +125C RL = 100 k to ground -55C TA +125C RL = 10 k to ground -55C TA +125C RL = 100 k to V+ -55C TA +125C RL = 10 k to V+ -55C TA +125C 0 120 115 125 120 4.99 4.99 4.95 4.95 25 -55C TA +125C Output Current IO -55C TA +125C POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier INPUT CAPACITANCE Differential Common Mode DYNAMIC PERFORMANCE Slew Rate Overload Recovery Time Gain Bandwidth Product NOISE PERFORMANCE Voltage Noise Voltage Noise Density Current Noise Density PSRR ISY VS = 2.7 V to 5.5 V, -55C TA +125C VO = VS/2 -55C TA +125C 115 140 130 145 135 0.008 4.996 4.995 4.98 4.97 1 2 10 15 50 40 30 15 130 0.85 1.0 0.05 5 5 20 20 1.1 1.2 V V V V mV mV mV mV mA mA mA mA dB mA mA CIN SR 1.5 8.0 pF pF RL = 10 k 1.0 0.05 2.5 V/s ms MHz 0.1 Hz to 10 Hz 0.1 Hz to 1.0 Hz f = 1 kHz f = 10 Hz 0.5 0.16 22 5 V p-p V p-p nV/Hz fA/Hz GBP en p-p en in Rev. A | Page 3 of 8 AD8629-EP Data Sheet ELECTRICAL CHARACTERISTICS--VS = 2.7 V VS = 2.7 V, VCM = 1.35 V, VO = 1.4 V, TA = 25C, unless otherwise noted. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Test Conditions/Comments Min VOS Typ Max Unit 1 5 15 100 1.5 200 250 2.7 V V pA nA pA pA V dB dB dB dB V/C -55C TA +125C Input Bias Current IB 30 1.0 50 -55C TA +125C Input Offset Current IOS -55C TA +125C Input Voltage Range Common-Mode Rejection Ratio CMRR Large Signal Voltage Gain AVO Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High VOS/T VOH Output Voltage Low VOL Short-Circuit Limit ISC VCM = 0 V to 2.7 V -55C TA +125C RL = 10 k, VO = 0.3 V to 2.4 V -55C TA +125C -55C TA +125C RL = 100 k to ground -55C TA +125C RL = 10 k to ground -55C TA +125C RL = 100 k to V+ -55C TA +125C RL = 10 k to V+ -55C TA +125C 0 115 110 110 105 2.68 2.68 2.67 2.67 10 -55C TA +125C Output Current IO -55C TA +125C POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier INPUT CAPACITANCE Differential Common Mode DYNAMIC PERFORMANCE Slew Rate Overload Recovery Time Gain Bandwidth Product NOISE PERFORMANCE Voltage Noise Voltage Noise Density Current Noise Density PSRR ISY VS = 2.7 V to 5.5 V, -55C TA +125C VO = VS/2 -55C TA +125C 115 130 120 140 130 0.002 2.695 2.695 2.68 2.675 1 2 10 15 15 10 10 5 130 0.75 0.9 0.05 5 5 20 20 1.0 1.2 V V V V mV mV mV mV mA mA mA mA dB mA mA CIN SR 1.5 8.0 pF pF RL = 10 k 1 0.05 2 V/s ms MHz 0.1 Hz to 10 Hz f = 1 kHz f = 10 Hz 0.5 22 5 V p-p nV/Hz fA/Hz GBP en p-p en in Rev. A | Page 4 of 8 Data Sheet AD8629-EP ABSOLUTE MAXIMUM RATINGS THERMAL CHARACTERISTICS Table 3. Parameter Supply Voltage Input Voltage Differential Input Voltage1 Output Short-Circuit Duration to GND Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) ESD HBM 8-Lead SOIC_N FICDM 8-Lead SOIC_N 1 Rating 6V GND - 0.3 V to VS + 0.3 V 5.0 V Indefinite -65C to +150C -55C to +125C -65C to +150C 300C JA is specified for worst-case conditions, that is, JA is specified for the device soldered in a circuit board for surface-mount packages. This was measured using a standard two-layer board. Table 4. Package Type 8-Lead SOIC_N (R-8) ESD CAUTION 4000 V 1250 V The differential input voltage is limited to 5 V or the supply voltage, whichever is less. Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability. Rev. A | Page 5 of 8 JA 158 JC 43 Unit C/W AD8629-EP Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 700 60 VS = 5V +85C 600 INPUT BIAS CURRENT (pA) 40 30 20 +25C 10 1 300 200 100 -40C 0 400 2 3 4 5 INPUT COMMON-MODE VOLTAGE (V) 6 0 -75 Figure 2. Input Bias Current vs. Input Common-Mode Voltage +75 +125 +150 +100 +50 0 -50 -100 -150 -75 -25 +25 TEMPERATURE (C) +75 +125 VS = 5V +ISC -ISC +100 +50 0 -50 -100 -150 -75 Figure 3. Output Short-Circuit Current vs. Temperature (2.7 V) -25 +25 TEMPERATURE (C) +75 +125 12890-006 +ISC -ISC OUTPUT SHORT-CIRCUIT CURRENT (mA) VS = 2.7V 12890-003 OUTPUT SHORT-CIRCUIT CURRENT (mA) +25 TEMPERATURE (C) Figure 5. Input Bias Current vs. Temperature +150 Figure 6. Output Short-Circuit Current vs. Temperature (5 V) 1k 1k 100 VCC - VOH @ 100k VOL - VEE @ 100k OUTPUT-TO-RAIL VOLTAGE (mV) VCC - VOH @ 1k VOL - VEE @ 1k VCC - VOH @ 10k VOL - VEE @ 10k 10 1 0.1 -75 VS = 2.7V -25 +25 TEMPERATURE (C) +75 +125 100 12890-004 OUTPUT-TO-RAIL VOLTAGE (mV) -25 VCC - VOH @ 1k VOL - VEE @ 1k VCC - VOH @ 10k VOL - VEE @ 10k VCC - VOH @ 100k VOL - VEE @ 100k 10 1 0.1 -75 VS = 5V -25 +25 TEMPERATURE (C) +75 +125 Figure 7. Output-to-Rail Voltage vs. Temperature (5 V) Figure 4. Output-to-Rail Voltage vs. Temperature (2.7 V) Rev. A | Page 6 of 8 12890-007 0 500 12890-002 INPUT BIAS CURRENT (pA) 50 12890-005 VS = 5V Data Sheet AD8629-EP 900 18 VS = 5V TA = -55C TO +125C VCM = 2.5V 700 12 10 8 6 500 400 300 4 200 2 100 0 -6 -4 -2 0 +2 +4 +6 +8 +10 +12 +14 +16 +18 +20 TCVOS (nV/C) 0 -75 140 130 VS = 2.7V TO 5V 120 110 100 90 80 70 -25 +25 TEMPERATURE (C) +75 +125 12890-009 60 50 -75 VS = 2.7V VS = 5V -25 +25 TEMPERATURE (C) +75 Figure 10. Supply Current vs. Temperature Figure 8. Input Offset Voltage Drift Distribution POWER SUPPLY REJECTION (dB) 600 Figure 9. Power Supply Rejection vs. Temperature Rev. A | Page 7 of 8 +125 12890-010 SUPPLY CURRENT (A) 14 800 12890-008 NUMBER OF AMPLIFIERS 16 AD8629-EP Data Sheet OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 1 5 4 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) 6.20 (0.2441) 5.80 (0.2284) 1.75 (0.0688) 1.35 (0.0532) 0.51 (0.0201) 0.31 (0.0122) COPLANARITY 0.10 SEATING PLANE 0.50 (0.0196) 0.25 (0.0099) 45 8 0 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) 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. 012407-A 8 4.00 (0.1574) 3.80 (0.1497) Figure 11. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) ORDERING GUIDE Model 1 AD8629TRZ-EP AD8629TRZ-EP-R7 1 Temperature Range -55C to +125C -55C to +125C Package Description 8-Lead Standard Small Outline Package [SOIC_N] 8-Lead Standard Small Outline Package [SOIC_N] Z = RoHS Compliant Part. (c)2002-2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D12890-0-8/15(A) Rev. A | Page 8 of 8 Package Option R-8 R-8