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AD7887:  2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP

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 ...More

AD7887:  2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP

Product Description

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).

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

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    EVALUATION BOARDS & DEVELOPMENT KITS

    • Specified for VDD of 2.7 V to 5.25 V
    • Flexible power/throughput rate management
    • Shutdown mode: 1 μA max
    • One or two single-ended inputs
    • Serial interface: SPI®/QSPI™/MICROWIRE™/DSP compatible
    • 8-lead narrow SOIC and MSOP packages
    • Resolution (Bits): 12bit
    • T-Put Rate: 125kSPS
    • # Chan: 2
    • Supply V: Single(+3),Single(+3.3),Single(+5)
    • Pwr Diss: 3.5mW
    • Interface: Ser,SPI
    • Ain Range: Uni (Vref)
    • SNR (dB): 71dB
    • Pkg Type: SOIC,SOP

    AD7887 Functional Block Diagram

    Similar Products

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    Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
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    AD7466 12 200KSPS 1 900µW
    AD7888 12 125KSPS 8 3.5mW
    AD7922 12 1MSPS 2 15mW
    AD7921 12 250KSPS 2 20mW
    AD7352 12 3MSPS 2 45mW
    AD7366-5 12 500KSPS 2 54.5mW
    AD7356 12 5MSPS 2 59mW
    AD7262 12 1MSPS 2 120mW
    AD7262-5 12 500KSPS 2 175mW
    AD9238-20 12 20MSPS 2 212mW
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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.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.