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AD7684:  16-Bit, 100 kSPS PulSAR®, Differential ADC in MSOP

Product Details

The AD7684 is a 16-bit, charge redistribution, successive approximation, PulSAR® analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.7 V to 5.5 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a serial, SPI-compatible interface port. The part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. On the CS falling edge, it samples the voltage difference between +IN and –IN pins. The reference voltage, REF, is applied externally and can be set up to the supply voltage. Its power scales linearly with throughput.

The AD7684 is housed in an 8-lead MSOP, with an operating temperature specified from −40°C to +85°C.


  • Battery-powered equipment
  • Data acquisition
  • Instrumentation
  • Medical instruments
  • Process control
  • Data Sheet, Rev. A, 10/07


    • 16-bit resolution with no missing codes
    • Throughput: 100 kSPS
    • INL: ±1 LSB typical, ±3 LSB maximum
    • True differential analog input range: ±VREF
      0 V to VREF with VREF up to VDD on both inputs
    • Single-supply operation: 2.7 V to 5.5 V
    • Standby current: 1 nA
    • Serial interface SPI®-/QSPI-™/MICROWIRE-™/DSP-compatible
    • Power dissipation
      4 mW @ 5 V
      1.5 mW @ 2.7 V
      150 μW @ 2.7 V/10 kSPS
    • 8-lead MSOP package

    Circuit Diagram for AD7684


    Title Content Type File Type
    AD7684: 16-Bit, 100 kSPS PulSAR, Differential ADC in MSOP Data Sheet (Rev A, 10/2007) (pdf, 414 kB) Data Sheets PDF
    AN-931: Understanding PulSAR ADC Support Circuitry  (pdf, 299 kB)
    This application note discusses in general the pitfalls that occur regularly when using SAR ADCs and, more importantly, how to easily prevent them.
    Application Notes PDF
    AN-932: Power Supply Sequencing  (pdf, 95 kB) Application Notes PDF
    UG-682: 6-Lead SOT-23 ADC Driver for the 8-/10-Lead Family of 14-/16-/18-Bit PulSAR ADC Evaluation Boards  (pdf, 433 kB) User Guides PDF
    UG-340: Evaluation Board for the 10-Lead Family 14-/16-/18-Bit PulSAR ADCs  (pdf, 4636 kB) User Guides PDF
    High Speed Op Amp Drives a 16-Bit, 1-MSPS Differential-Input A/D Converter
    (Analog Dialogue, Vol. 36, No. 6, November/December 2002)
    Analog Dialogue HTML
    MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
    Low-Power Data Conversion Technology Enhances Portability
    (Electropages, 10/5/2006)
    Product Reviews HTML
    Lowest-Power 16-Bit ADC Optimizes Portable Designs
    (eeProductCenter, 10/4/2006)
    Product Reviews HTML
    8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog  (pdf, 1885 kB)
    8- to 18-Bit SAR ADCs with Sample Rates up to 3 MSPS -- The latest additions to ADI’s ADC portfolio offer unrivaled functionality in terms of channel count and power supply voltage, optimal power/speed ratios, and the smallest packages to meet the demands of any data acquisition application, including portable, industrial, medical, wireless, and communications.
    Overview PDF
    High Speed, High Accuracy 14-Bit, 16-Bit, and 18-Bit PulSAR ADCs  (pdf, 3826 kB)
    A PulSAR Family Brochure (6/2006)
    Overview PDF
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

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    Price, packaging, availability

    AD7684 Model Options
    Model Package Pins Temp.
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    AD7684BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $7.28 $6.58 Y  Material Info PCN Purchase Sample
    AD7684BRMZRL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $6.58 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.

    AD7684 Evaluation Kit
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    EVAL-AD7684SDZ Status: Production Evaluation Board - Yes -
    EVAL-SDP-CB1Z Status: Production Evaluation Controller Board $99.00 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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