2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP

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Product Details

The AD7887 is a high speed, low power, 12-bit analog-to-digital converter (ADC) that operates from a single 2.7 V to 5.25 V power supply. The AD7887 is capable of 125 kSPS throughput rate. The input track-and-hold acquires a signal in 500 ns and features a single-ended sampling scheme. The output coding for the AD7887 is straight binary, and the part is capable of converting full power signals of up to 2.5 MHz.

The AD7887 can be configured for either dual- or single-channel operation via the on-chip control register. There is a default single-channel mode that allows the AD7887 to be operated as a read-only ADC. In single-channel operation, there is one analog input (AIN0) and the AIN1/VREF pin assumes its VREF function. This VREF pin allows the user access to the part’s internal 2.5 V reference, or the VREF pin can be overdriven by an external reference to provide the reference voltage for the part. This external reference voltage has a range of 2.5 V to VDD. The analog input range on AIN0 is 0 to VREF.

In dual-channel operation, the AIN1/VREF pin assumes its AIN1 function, providing a second analog input channel. In this case, the reference voltage for the part is provided via the VDD pin. As a result, the input voltage range on both the AIN0 and AIN1 inputs is 0 to VDD.

CMOS construction ensures low power dissipation of typically 2 mW for normal operation and 3 μW in power-down mode. The part is available in an 8-lead, 0.15-inch-wide narrow body SOIC and an 8-lead MSOP package.

Product Highlights
  1. Smallest 12-bit dual-/single-channel ADC; 8-lead MSOP package.
  2. Lowest power 12-bit dual-/single-channel ADC.
  3. Flexible power management options, including automatic power-down after conversion.
  4. Read-only ADC capability.
  5. Analog input range from 0 V to VREF.
  6. Versatile serial input/output port (SPI/QSPI/MICROWIRE/ DSP compatible).

  • Battery-powered systems (personal digital assistants, medical instruments, mobile communications)
  • Instrumentation and control systems
  • High speed modems
  • 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


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    EVAL-AD7887 Circuit Diagram

    Product Details

    The EVAL-AD7887SDZ is a full featured evaluation board designed to allow easy evaluation of all the features of the AD7887 analog-to-digital converter (ADC). The evaluation board can be controlled via the SDP connector (J20). The SDP board (EVAL-SDP-CB1Z) allows the evaluation board to be controlled through the USB port of a PC using the software available for download from the EVAL-AD7887SDZ product page.
    The EVAL-AD7887SDZ software provides dynamic performance analysis in the form of waveform graphs, histograms, and FFT analysis for ADC performance evaluation.
    On-board components include: the AD8033 and the AD8034 FastFET high speed precision rail-to-rail op amps, the ADP3303 high accuracy 200 mA low dropout linear regulator, and the AD780 2.5 V/3.0 V ultrahigh precision band gap voltage reference.

    Online Resources
    • Documents needed
    • AD7887 data sheet
    • EVAL-AD7887SDZ user guide
    • Required software
    • EVAL-AD7887SDZ evaluation software
    • Design and integration files
    • Schematics, layout files, bill of materials
    Evaluation Kit Contents
    • EVAL-AD7887SDZ evaluation board
    • Evaluation software CD for the AD7887
    • Mains power supply adapter
    • Screw/nut kit

    Reference Designs


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    CN0150 Circuit Diagram

    CN0150 Photo


    CN0189 Circuit Diagram

    CN0189 Photo

    Design Resources

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    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.

    AD7887 Material Declaration
    PCN-PDN Information Quality And Reliability Symbols and Footprints


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    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.

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