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  5. AD8657

Data Sheet Rev. C
SPICE Models
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Circuit Note
CN 2 View All

Overview

Features and Benefits

  • 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

Product Details

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 operate 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 transmitters.

The AD8657/AD8659 are 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.

Applications

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

Product Categories

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Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Documentation & Resources

  • View All (18)
  • Data Sheets (1)
  • Technical Books (1)
  • Tutorials (2)
  • Product Selection Guide (1)
  • Circuit Note (2)
  • Technical Articles (1)
  • Rarely Asked Questions (10)
    • Document Type
    Rarely Asked Questions

    Tools & Simulations

    LTspice

    LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

    LTspice

    Models for the following parts are available in LTspice:

    AD8657

    SPICE Models

    Design Tools

    Analog Filter Wizard

    Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.

    Analog Photodiode Wizard

    Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.

    Reference Designs (2)

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    AD8657ACPZ-R7 Material Declaration Reliability Data 8-Lead LFCSP (3mm x 3mm w/ EP)
    AD8657ACPZ-RL Material Declaration Reliability Data 8-Lead LFCSP (3mm x 3mm w/ EP)
    AD8657ARMZ Material Declaration Reliability Data 8-Lead MSOP
    AD8657ARMZ-R7 Material Declaration Reliability Data 8-Lead MSOP
    AD8657ARMZ-RL Material Declaration Reliability Data 8-Lead MSOP
    Wafer Fabrication Data

    PCN-PDN Information

    Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

    Select Model for PCN Information
    • AD8657ACPZ-R7 Production
    • AD8657ACPZ-RL Production
    • AD8657ARMZ Production
    • AD8657ARMZ-R7 Production
    • AD8657ARMZ-RL Production

    Support & Discussions

    AD8657 Discussions

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    Sample & Buy


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    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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