AD7982:  18-Bit, 1 MSPS PulSAR® 7.0 mW ADC in MSOP/QFN

The AD7982 is an 18-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a ...More

AD7982:  18-Bit, 1 MSPS PulSAR® 7.0 mW ADC in MSOP/QFN

Product Description

The AD7982 is an 18-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7982 samples the voltage difference between the IN+ and IN− pins. The voltages on these pins usually swing in opposite phases between 0 V and VREF. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.

The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.

The AD7982 is available in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +85°C.

Applications

  • Battery-powered equipment
  • Data acquisition systems
  • Medical instruments
  • Seismic data acquisition systems

    • Data Sheet, Rev. A, 10/07

    Features

    • 18-bit resolution with no missing codes
    • Throughput: 1 MSPS
    • INL: ±1 LSB typical, ±2 LSB maximum
    • Low power dissipation
      7.0 mW at 1 MSPS
      70 μW at 10 kSPS
    • True differential analog input range: ±VREF
      0 V to VREF with VREF between 2.5 V to 5.0 V
      Allows use of any input range
      Easy to drive with the ADA4941
    • Dynamic range: 99 dB
    • No pipeline delay
    • Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
    • Serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
    • Ability to daisy-chain multiple ADCs and busy indicator
    • 10-lead package: MSOP (MSOP-8 size) and 3 mm × 3 mm QFN (LFCSP), SOT-23 size
    Circuits from the Lab

    Find more at our Circuits Library.

    Products Used in This Circuit:
    AD7982, ADA4941-1, ADR435

    Circuit Types:  ADC Circuit/Driver
    Applications:  Instrumentation; Process Control
    Optimized For:  High Performance; High Precision; Temperature Stability

    Diagrams

    AD7982 Diagram
    Circuit Diagram for AD7982

    Specifications

    Resolution (Bits) 18bit
    T-Put Rate 1MSPS
    # Chan 1
    Supply V Multi(+2.5, +5),Single(+2.5)
    Pwr Diss 8.6mW
    Interface Ser,SPI
    Ain Range (2Vref) p-p
    SNR (dB) 98dB
    Pkg Type SOP

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    Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
    AD7982 18 1MSPS 1 8.6mW
    AD7450 12 1MSPS 1 1.3mW
    AD7984 18 1.33MSPS 1 14mW
    AD7643 18 1.25MSPS 1 80mW
    AD7641 18 2MSPS 1 92mW
    AD7980 16 1MSPS 1 10mW
    AD7983 16 1.33MSPS 1 12mW
    AD7623 16 1.33MSPS 1 55mW
    AD7622 16 2MSPS 1 85mW
    AD7621 16 3MSPS 1 86mW
    AD7400 16 10MSPS 1 90mW
    Pricing, Packaging & Availability

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    Pin Count
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    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
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    • Automotive: -40 to +125 degrees Celsius
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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.

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