Alternative Parts


Features and Benefits

  • 2 Independent ADCs (16- and 24-Bit Resolution)
  • Factory-Calibrated (Field Calibration Not Required)
  • Output Settles in 1 Conversion Cycle (Single Conversion Mode)
  • Programmable Gain Front End
  • Simultaneous Sampling and Conversion of 2 Signal Sources
  • Separate Reference Inputs for Each Channel
  • Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz Update Rate
  • 24-Bit No Missing Codes—Main ADC
  • 13-Bit p-p Resolution @ 20 Hz, 20 mV Range
  • 18-Bit p-p Resolution @ 20 Hz, 2.56 V Range
  • 3-Wire Serial
  • SPI®, QSPI™, MICROWIRE™, and DSP Compatible
  • Schmitt Trigger on SCLK

Product Details

The AD7719 is a complete analog front-end for low frequency measurement applications. It contains two high-resolution sigma delta ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port and temperature sensor. The 24-bit main channel with PGA accepts fully differential, unipolar and bipolar input signal ranges from REFIN1/128 to REFIN1. Signals can be converted directly from a transducer without the need for signal conditioning. The 16-bit aux channel does not have a PGA and has an input signal range of REFIN2 or REFIN2/2.

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 (1)

Documentation & Resources

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  • Data Sheets (1)
  • Application Notes (12)
  • Technical Articles (5)
  • Application Notes

    Software & Systems Requirements

    Evaluation Software

    Tools & Simulations

    Design Tools

    Sigma-Delta ADC Tutorial

    An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.

    Design Resources

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    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.