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AD7686:  500 kSPS 16-BIT PulSAR® A/D Converter in MSOP/QFN

The AD7686 is a 16-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single 5 V power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay track-and-hold ...More

AD7686:  500 kSPS 16-BIT PulSAR® A/D Converter in MSOP/QFN

Product Description

The AD7686 is a 16-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single 5 V power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, the AD7686 samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set up to the supply voltage.

Power dissipation 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 or provides an optional busy indicator. This device is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO.

The AD7686 is housed 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 acquisitions
  • Instrumentation
  • Medical instruments
  • Process controls

    • Data Sheet, Rev. B, 3/07

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    • 16-bit resolution with no missing codes
    • Throughput: 500 kSPS
    • INL: ±0.6 LSB typical, ±2 LSB maximum (±0.003% of FSR)
    • SINAD: 92.5 dB @ 20 kHz
    • THD: −110 dB @ 20 kHz
    • Pseudo differential analog input range 0 V to VREF with VREF up to VDD
    • No pipeline delay
    • Single-supply 5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
    • Serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
    • Daisy-chain multiple ADCs and busy indicator
    • Power dissipation
      3.75 μW @ 5 V/100 SPS
      3.75 mW @ 5 V/100 kSPS
    • Standby current: 1 nA
    • Resolution (Bits): 16bit
    • T-Put Rate: 500kSPS
    • # Chan: 1
    • Supply V: Single(+5)
    • Pwr Diss: 21.5mW
    • Interface: Ser,SPI
    • Ain Range: (Vref) p-p
    • SNR (dB): 92.7dB
    • Pkg Type: CSP,SOIC,SOP

    Functional Block Diagram for AD7686

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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.