AD7788

PRODUCTION

16-Bit, Single-Channel, Ultra Low Power, Sigma-Delta A/D Converter

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Overview

  • 16-bit resolution
  • Power
    • Supply: 2.5 V to 5.25 V operation
    • Normal: 75 µA maximum
    • Power-down: 1 µA maximum
  • RMS noise: 1.5 µV
  • 16-bit p-p resolution
  • Integral nonlinearity: 3.5 ppm typical
  • Simultaneous 50 Hz and 60 Hz rejection
  • Internal clock oscillator
  • VDD monitor channel
  • 10-lead MSOP

The AD7788/AD7789 are low power, low noise, analog front ends for low frequency measurement applications. The AD7789 contains a low noise, 24-bit, ∑-∆ analog-to-digital converter (ADC) with one differential input. The AD7788 is a 16-bit version of the AD7789.

The devices operate from an internal clock. Therefore, the user does not have to supply a clock source to the devices. The output data rate is 16.6 Hz, which gives simultaneous 50 Hz/60 Hz rejection.

The devices operate with a single power supply from 2.5 V to 5.25 V. When operating from a 3 V supply, the power dissipation for the device is 225 µW maximum. The AD7788/AD7789 are available in a 10-lead MSOP.

Applications

  • Smart transmitters
  • Battery applications
  • Portable instrumentation
  • Sensor measurement
  • Temperature measurement
  • Pressure measurement
  • Weigh scales
  • 4 to 20 mA loops

AD7788

16-Bit, Single-Channel, Ultra Low Power, Sigma-Delta A/D Converter

AD7788/AD7789 Functional Block Diagram AD7788/AD7789 Pin Configuration
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Software Resources


Tools & Simulations

Sigma-Delta ADC Tutorial

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

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