Overview

Features and Benefits

  • 16-bit resolution with no missing codes
  • Throughput: 250 kSPS
  • INL: ±0.4 LSB typ, ±1.5 LSB max (±23 ppm of FSR)
  • Dynamic range: 96.5 dB
  • SNR: 95.5 dB at 20 kHz
  • THD: −118 dB at 20 kHz
  • True differential analog input range
    • ±VREF
    • 0 V to VREF with VREF up to VDD on both inputs
  • No pipeline delay
  • Single-supply 2.3 V to 5.5 V operation with 1.8 V/2.5 V/3 V/
    5 V logic interface
  • Refer to data sheet for additional features.

Product Details

The AD76871 is a 16-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 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 versatile serial interface port. The device also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, the AD7687 the samples the voltage difference between IN+ and IN− pins, which can range from −VREF to +VREF. The reference voltage, VREF, is applied externally and can be set up to the supply voltage.

The power consumption of the device scales linearly with throughput.

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

The AD7687 comes in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C.

Applications

  • Battery-powered equipment
  • Data acquisitions
  • Instrumentation
  • Medical instruments
  • Process controls

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

Tools & Simulations

IBIS Models

AD7685 IBIS Models

Reference Designs (1)

Product Recommendations

AD7687 Companion Parts

Recommended Digital Isolators

  • For SPI Interface, lowest power, 2.5 kVrms isolation: ADUM1401.
  • For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V): ADUM3481.
  • For SPI Interface, low power, 5.0 kVrms isolation: ADUM4401.
  • For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation: ADUM3401.

Recommended Driver Amplifiers

Recommended Voltage Reference

Design Resources

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.

PCN-PDN Information

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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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Evaluation Boards Pricing displayed is based on 1-piece.
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.