AD7981

High Temperature,16-BIT, 600 kSPS pulSAR® ADC


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Product Details

The AD7981 is a 16-bit, successive approximation, analog-to-digital converter (ADC) designed for high temperature operation. The AD7981 is capable of sample rates up to 600 kSPS while maintaining low power consumption from a single power supply, VDD. It is one of the fastest and highest accuracy, high temperature, successive approximation register (SAR) ADCs and packaged in a small form factor with a versatile serial port interface (SPI).

On the CNV rising edge, the AD7981 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 independent of the supply voltage, VDD. The device 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, or 5 V logic, using the separate supply VIO.

For space constrained applications, the AD7981 is available in a 10-lead mini small outline package (MSOP) with operation specified from −55°C to +175°C. This package is designed for robustness at extreme temperatures, including mono-metallic wire bonding, and is qualified for up to 1000 hours of operation at the maximum temperature rating.

The AD7981 is a member of a growing series of high temperature qualified products offered by Analog Devices, Inc. For a complete selection of available high temperature products, see the high temperature product list and qualification data available at www.analog.com/hightemp.

Applications

  • Downhole drilling and instrumentation
  • Avionics
  • Heavy industrial
  • High temperature environments

Product Lifecycle

checked Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Reference Designs

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CN0365

CN0365 Circuit Diagram

CN0365 Photo

Design Resources

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

AD7981 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

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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.


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