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AD8657:  18V, 22µA, 45nV/√Hz, Precision RRIO, Dual Op Amp

Product Details

Product Status:Recommended for New Designs

The AD8657/AD8659 are dual and quad micropower, precision, rail-to-rail input/output amplifiers optimized for low power and wide operating supply voltage range applications.

The AD8657/AD8659 operates from 2.7 V to 18 V with a typical quiescent supply current of 18 μA. The devices use the Analog Devices, Inc., patented DigiTrim® trimming technique, which achieves low offset voltage. The AD8657/AD8659 also have high immunity to electromagnetic interference.

The combination of low supply current, low offset voltage, very low input bias current, wide supply range, and rail-to-rail input and output make the AD8657/AD8659 ideal for current monitoring in process and motor control applications. The combination of precision specifications makes these devices ideal for dc gain and buffering of sensor front ends or high impedance input sources in wireless or remote sensors or transmitter.

The AD8657/AD8659 is specified over the extended industrial temperature range (−40°C to +125°C). The AD8657 is available in an 8-lead MSOP package and an 8-lead LFCSP package; the AD8659 is available in a 14-lead SOIC package and 16-lead LFCSP package.


  • Portable operating systems
  • Current monitors
  • 4 mA to 20 mA loop drivers
  • Buffer/level shifting
  • Multipole filters
  • Remote/wireless sensors
  • Low power transimpedance amplifiers


  • Micropower at high voltage (18 V):
    22 μA maximum
  • Low offset voltage:
    350 µV maximum
  • Low input bias current:
    20 pA maximum
  • Gain bandwidth product:
    230 kHz at AV = 100 typical
  • Unity-gain crossover: 230 kHz
  • −3 dB closed-loop bandwidth:
      305 kHz
  • Single-supply operation:
    2.7 V to 18 V
  • Dual-supply operation:
    ±1.35 V to ±9 V
  • Unity-gain stable
  • Excellent electromagnetic interference immunity

Pin Configuration for AD8657

Similar Products

AD8603, AD8607, AD8609: available in single, dual, and quad channel versions operating at 5V offering lower offset, input bias current, and voltage noise with higher bandwidth, slew rate, and output drive.


Title Content Type File Type
AD8657/AD8659: 22 µA, RRIO, CMOS,18 V Operational Amplifiers Data Sheet (Rev B, 08/2012) (pdf, 711 kB) Data Sheets PDF
CN-0181: Precision, 16-Bit, Voltage Level Setting with Less than 5 mW Total Power Dissipation  (pdf, 175 kB) Circuit Note PDF
CN-0179: Less Than 200 μA, Low Power, 4 mA-to-20 mA, Process Control Current Loop  (pdf, 156 kB) Circuit Note PDF
Op Amp Applications Handbook Design Handbooks HTML
MT-058: Effects of Feedback Capacitance on VFB and CFB Op Amps  (pdf, 66 kB) Tutorials PDF
MT-047: Op Amp Noise  (pdf, 72 kB) Tutorials PDF
MS-2212: The Maximum Supply Current That Wasn't  (pdf, 241 kB) Technical Articles PDF
Amplifiers for Signal Conditioning - Section 3  (PDF, 397 kB)
By Walt Kester, James Bryant, Walt Jung
Technical Articles PDF
Avoiding Op-Amp Instability Problems In Single-Supply Applications
(Analog Dialogue, Vol. 35, No. 2, March-May, 2001)
Analog Dialogue HTML
SAR ADC & Driver Quick-Match Guide  (pdf, 251 kB)
Find drivers for ADI's most popular single-ended and differential SAR ADCs based on your specific application conditions.
Product Selection Guide PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
This tool will help with the selection, evaluation and troubleshooting of voltage feedback Op-Amps. It uses typical data to model the behavior of a selected amplifier. It allows a user to select an amplifier, configure a circuit, apply a signal and evaluate the performance. It is useful for checking an amplifier's spec's such as Bandwidth, Slew Rate, Input/Output Range, Gain Error, Load Current, Stability Issues and DC Errors in a given circuit.
ADIsim Design/Simulation Tools HTML
Analog Bridge Wizard
The Analog Bridge Wizard recommends amplifiers and ADC's for your bridge application. Find out which op-amp or in-amp is best for your design, and view the error budget analysis for that solution.
ADIsim Design/Simulation Tools HTML
AD8657 SPICE Macro-Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

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Price, packaging, availability

AD8657 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD8657ACPZ-R7 Status: Production 8 ld LFCSP (3x3mm w/1.7x2.4 EP) 8 Ind Reel, 1500 - $0.95 Y  Material Info PCN Purchase Sample
AD8657ACPZ-RL Status: Production 8 ld LFCSP (3x3mm w/1.7x2.4 EP) 8 Ind Reel, 5000 - $0.95 Y  Material Info PCN Purchase
AD8657ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.15 $0.95 Y  Material Info PCN Purchase Sample
AD8657ARMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $0.95 Y  Material Info PCN Purchase
AD8657ARMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $0.95 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

EVAL-OPAMP-2 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-PRAOPAMP-2CPZ Status: Production Dual CP-8 lead LFCSP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-2RMZ Status: Production Dual RM-8 lead MSOP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-2RZ Status: Production Dual R-8 lead SOIC Evaluation Board $20.19 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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