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, ...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

    Features

    • 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

    Diagrams

    AD7686 Diagram
    Functional Block Diagram for AD7686

    Specifications

    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

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    AD7781 - 20-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC

    Subscribe to New Products Feed More
    Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
    AD7983 16 1.33MSPS 1 12mW
    AD7686 16 500KSPS 1 21.5mW
    AD7688 16 500KSPS 1 21.5mW
    AD7693 16 500KSPS 1 21.5mW
    AD7980 16 1MSPS 1 10mW
    AD7946 14 500KSPS 1 19mW
    AD7982 18 1MSPS 1 8.6mW
    AD7984 18 1.33MSPS 1 14mW
    AD7451 12 1MSPS 1 9.25mW
    AD7276 12 3MSPS 1 19.8mW
    AD7492-1.25MSPS 12 1.25MSPS 1 16.5mW
    Pricing, Packaging & Availability

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    Package Description
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    For detailed drawings and chemical composition please consult our  Package Site

    Pin Count
    Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

    Temperature Range
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    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
    • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
    • 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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