Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier Data Sheet AD8629-EP FEATURES PIN CONFIGURATION Lowest auto-zero amplifier noise OUT A 1 8 V+ Low offset voltage: 1 μV typical –IN A 2 AD8629-EP 7 OUT B Input offset drift: 0.002 μV/°C typical TOP VIEW +IN A 3 6 –IN B R5 aVi ls-itnog-rlaei-ls iunpppulty a onpde orauttipount swing V– 4 (Not to Scale) 5 +IN B 12890-001 Figure 1. 8-Lead SOIC_N (R-8) High gain, CMRR, and PSRR: 130 dB Very low input bias current: 100 pA maximum GENERAL DESCRIPTION Low supply current: 1.0 mA The AD8629-EP amplifier has ultralow offset, drift, and bias Overload recovery time: 50 μs current. The device is a wide bandwidth auto-zero amplifier No external components required featuring rail-to-rail input and output swing and low noise. ENHANCED PRODUCT FEATURES Operation is fully specified from 2.7 V to 5 V single supply (±1.35 V to ±2.5 V dual supply). Supports defense and aerospace applications (AQEC standard) Extended temperature range: −55°C to +125°C The AD8629-EP provides benefits previously found only in Controlled manufacturing baseline expensive auto-zeroing or chopper-stabilized amplifiers. Using One assembly/test site Analog Devices, Inc., topology, this zero-drift amplifier One fabrication site combines low cost with high accuracy and low noise. No Enhanced product change notification external capacitor is required. In addition, the AD8629-EP Qualification data available on request greatly reduces the digital switching noise found in most chopper-stabilized amplifiers. APPLICATIONS With an offset voltage of only 1 μV, drift of less than 0.05 μV/°C, Pressure and position sensors and noise of only 0.5 μV p-p (0 Hz to 10 Hz), the AD8629-EP is Strain gage amplifiers suited for applications where error sources cannot be tolerated. Medical instrumentation Position and pressure sensors, medical equipment, and strain Thermocouple amplifiers gage amplifiers benefit greatly from nearly zero drift over the Precision current sensing operating temperature range. Many systems can take advantage Photodiode amplifiers of the rail-to-rail input and output swings provided by the AD8629-EP to reduce input biasing complexity and maximize SNR. The AD8629-EP is specified for the extended industrial temperature range (−55°C to +125°C). 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 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 license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2002–2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com

AD8629-EP Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Electrical Characteristics—V = 2.7 V........................................4 S 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—V = 5.0 V ....................................... 3 S 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—V = 5.0 V S V = 5.0 V, V = 2.5 V, T = 25°C, unless otherwise noted. S CM A Table 1. Parameter Symbol Test Conditions/Comments Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage V 1 5 µV OS −55°C ≤ T ≤ +125°C 15 µV A Input Bias Current I 30 100 pA B −55°C ≤ T ≤ +125°C 1.5 nA A Input Offset Current I 50 200 pA OS −55°C ≤ T ≤ +125°C 250 pA A Input Voltage Range 0 5 V Common-Mode Rejection Ratio CMRR V = 0 V to 5 V 120 140 dB CM −55°C ≤ T ≤ +125°C 115 130 dB A Large Signal Voltage Gain A R = 10 kΩ, V = 0.3 V to 4.7 V 125 145 dB VO L O −55°C ≤ T ≤ +125°C 120 135 dB A Offset Voltage Drift ∆V /∆T −55°C ≤ T ≤ +125°C 0.008 0.05 µV/°C OS A OUTPUT CHARACTERISTICS Output Voltage High V R = 100 kΩ to ground 4.99 4.996 V OH L −55°C ≤ T ≤ +125°C 4.99 4.995 V A R = 10 kΩ to ground 4.95 4.98 V L −55°C ≤ T ≤ +125°C 4.95 4.97 V A Output Voltage Low V R = 100 kΩ to V+ 1 5 mV OL L −55°C ≤ T ≤ +125°C 2 5 mV A R = 10 kΩ to V+ 10 20 mV L −55°C ≤ T ≤ +125°C 15 20 mV A Short-Circuit Limit I ±25 ±50 mA SC −55°C ≤ T ≤ +125°C ±40 mA A Output Current I ±30 mA O −55°C ≤ T ≤ +125°C ±15 mA A POWER SUPPLY Power Supply Rejection Ratio PSRR V = 2.7 V to 5.5 V, −55°C ≤ T ≤ +125°C 115 130 dB S A Supply Current per Amplifier I V = V/2 0.85 1.1 mA SY O S −55°C ≤ T ≤ +125°C 1.0 1.2 mA A INPUT CAPACITANCE C IN Differential 1.5 pF Common Mode 8.0 pF DYNAMIC PERFORMANCE Slew Rate SR R = 10 kΩ 1.0 V/µs L Overload Recovery Time 0.05 ms Gain Bandwidth Product GBP 2.5 MHz NOISE PERFORMANCE Voltage Noise e p-p 0.1 Hz to 10 Hz 0.5 µV p-p n 0.1 Hz to 1.0 Hz 0.16 µV p-p Voltage Noise Density e f = 1 kHz 22 nV/√Hz n Current Noise Density i f = 10 Hz 5 fA/√Hz n Rev. A | Page 3 of 8

AD8629-EP Data Sheet ELECTRICAL CHARACTERISTICS—V = 2.7 V S V = 2.7 V, V = 1.35 V, V = 1.4 V, T = 25°C, unless otherwise noted. S CM O A Table 2. Parameter Symbol Test Conditions/Comments Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage V 1 5 µV OS −55°C ≤ T ≤ +125°C 15 µV A Input Bias Current I 30 100 pA B −55°C ≤ T ≤ +125°C 1.0 1.5 nA A Input Offset Current I 50 200 pA OS −55°C ≤ T ≤ +125°C 250 pA A Input Voltage Range 0 2.7 V Common-Mode Rejection Ratio CMRR V = 0 V to 2.7 V 115 130 dB CM −55°C ≤ T ≤ +125°C 110 120 dB A Large Signal Voltage Gain A R = 10 kΩ, V = 0.3 V to 2.4 V 110 140 dB VO L O −55°C ≤ T ≤ +125°C 105 130 dB A Offset Voltage Drift ∆V /∆T −55°C ≤ T ≤ +125°C 0.002 0.05 µV/°C OS A OUTPUT CHARACTERISTICS Output Voltage High V R = 100 kΩ to ground 2.68 2.695 V OH L −55°C ≤ T ≤ +125°C 2.68 2.695 V A R = 10 kΩ to ground 2.67 2.68 V L −55°C ≤ T ≤ +125°C 2.67 2.675 V A Output Voltage Low V R = 100 kΩ to V+ 1 5 mV OL L −55°C ≤ T ≤ +125°C 2 5 mV A R = 10 kΩ to V+ 10 20 mV L −55°C ≤ T ≤ +125°C 15 20 mV A Short-Circuit Limit I ±10 ±15 mA SC −55°C ≤ T ≤ +125°C ±10 mA A Output Current I ±10 mA O −55°C ≤ T ≤ +125°C ±5 mA A POWER SUPPLY Power Supply Rejection Ratio PSRR V = 2.7 V to 5.5 V, −55°C ≤ T ≤ +125°C 115 130 dB S A Supply Current per Amplifier I V = V/2 0.75 1.0 mA SY O S −55°C ≤ T ≤ +125°C 0.9 1.2 mA A INPUT CAPACITANCE C IN Differential 1.5 pF Common Mode 8.0 pF DYNAMIC PERFORMANCE Slew Rate SR R = 10 kΩ 1 V/µs L Overload Recovery Time 0.05 ms Gain Bandwidth Product GBP 2 MHz NOISE PERFORMANCE Voltage Noise e p-p 0.1 Hz to 10 Hz 0.5 µV p-p n Voltage Noise Density e f = 1 kHz 22 nV/√Hz n Current Noise Density i f = 10 Hz 5 fA/√Hz n Rev. A | Page 4 of 8

Data Sheet AD8629-EP ABSOLUTE MAXIMUM RATINGS THERMAL CHARACTERISTICS Table 3. Parameter Rating θ is specified for worst-case conditions, that is, θ is specified JA JA Supply Voltage 6 V for the device soldered in a circuit board for surface-mount Input Voltage GND − 0.3 V to V + 0.3 V packages. This was measured using a standard two-layer board. S Differential Input Voltage1 ±5.0 V Table 4. Output Short-Circuit Duration to GND Indefinite Storage Temperature Range −65°C to +150°C Package Type θJA θJC Unit 8-Lead SOIC_N (R-8) 158 43 °C/W Operating Temperature Range −55°C to +125°C Junction Temperature Range −65°C to +150°C ESD CAUTION Lead Temperature (Soldering, 60 sec) 300°C ESD HBM 8-Lead SOIC_N ±4000 V FICDM 8-Lead SOIC_N ±1250 V 1 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

AD8629-EP Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 60 700 VS = 5V VS = 5V +85°C 600 50 A) A) p p 500 T ( 40 T ( N N E E R R 400 R R CU 30 CU AS AS 300 BI BI PUT 20 +25°C PUT 200 N N I I 10 –40°C 100 00 1 INPUT C2OMMON-M3ODE VOLT4AGE (V) 5 6 12890-002 0–75 –25 TEMPER+A2T5URE (°C) +75 +12512890-005 Figure 2. Input Bias Current vs. Input Common-Mode Voltage Figure 5. Input Bias Current vs. Temperature +150 +150 NT (mA)+100 VS = 2.7V +–IISSCC NT (mA)+100 VS = 5V +–IISSCC CURRE +50 CURRE +50 UIT UIT RC 0 RC 0 CI CI RT- RT- HO –50 HO –50 UT S UT S UTP–100 UTP–100 O O –150–75 –25 TEMPER+A2T5URE (°C) +75 +125 12890-003 –150–75 –25 TEMPER+A2T5URE (°C) +75 +12512890-006 Figure 3. Output Short-Circuit Current vs. Temperature (2.7 V) Figure 6. Output Short-Circuit Current vs. Temperature (5 V) 1k 1k VCC – VOH@ 1kΩ VCC – VOH@ 100kΩ VCC – VOH@ 1kΩ VCC – VOH@ 100kΩ VOL – VEE@ 1kΩ VOL – VEE@ 100kΩ VOL – VEE@ 1kΩ VOL – VEE@ 100kΩ GE (mV) 100 VVCOCL –– VVEOEH@@ 1100kkΩΩ GE (mV) 100 VVCOCL –– VVEOEH@@ 1100kkΩΩ A A OLT OLT RAIL V 10 RAIL V 10 O- O- UT-T UT-T UTP 1 UTP 1 O O VS = 2.7V VS = 5V 0.1–75 –25 TEMPER+A2T5URE (°C) +75 +12512890-004 0.1–75 –25 TEMPER+A2T5URE (°C) +75 +12512890-007 Figure 4. Output-to-Rail Voltage vs. Temperature (2.7 V) Figure 7. Output-to-Rail Voltage vs. Temperature (5 V) Rev. A | Page 6 of 8

Data Sheet AD8629-EP 18 900 16 VS = 5V 800 TA = –55°CTO +125°C 14 VCM = 2.5V 700 S R A) MPLIFIE1102 RENT (µ 560000 A R F U O 8 C 400 R Y NUMBE 46 SUPPL 230000 VVSS == 25.V7V 2 100 0 –6 –4 –2 0 +2 +T4CV+O6S (+n8V/C+)10+12+14+16+18+20 12890-008 0–75 –25 TEMPER+A2T5URE (°C) +75 +12512890-010 Figure 8. Input Offset Voltage Drift Distribution Figure 10. Supply Current vs. Temperature 140 130 VS = 2.7V TO 5V B) d 120 N ( O TI 110 C E EJ 100 R Y PL 90 P U S 80 R E OW 70 P 60 50–75 –25 TEMPER+A2T5URE (°C) +75 +125 12890-009 Figure 9. Power Supply Rejection vs. Temperature Rev. A | Page 7 of 8

AD8629-EP Data Sheet OUTLINE DIMENSIONS 5.00(0.1968) 4.80(0.1890) 8 5 4.00(0.1574) 6.20(0.2441) 3.80(0.1497) 1 4 5.80(0.2284) 1.27(0.0500) 0.50(0.0196) 45° BSC 1.75(0.0688) 0.25(0.0099) 0.25(0.0098) 1.35(0.0532) 8° 0.10(0.0040) 0° COPLANARITY 0.51(0.0201) 1.27(0.0500) 0.10 SEATING 0.31(0.0122) 0.25(0.0098) 0.40(0.0157) PLANE 0.17(0.0067) COMPLIANTTOJEDECSTANDARDSMS-012-AA CONTROLLINGDIMENSIONSAREINMILLIMETERS;INCHDIMENSIONS A (RINEFPEARREENNCTEHEOSNELSY)AANRDEARROEUNNODTEDA-POPFRFOMPIRLLIAIMTEETFEORREUQSUEIVINALDEENSTIGSNF.OR 012407- Figure 11. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) ORDERING GUIDE Model1 Temperature Range Package Description Package Option AD8629TRZ-EP −55°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8 AD8629TRZ-EP-R7 −55°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8 1 Z = RoHS Compliant Part. ©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

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