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AD7191 - Sigma-Delta ADC

General Description

The AD7191 is a low noise, complete analog front end for high precision measurement applications.

It contains a low noise, 24-bit sigma-delta (Σ-Δ) ADC.

The on-chip low noise gain stage means that signals of small amplitude can be interfaced directly to the ADC.

Key Features

  • Pin-programmable output rate Output data rate: 10 Hz, 50 Hz, 60 Hz, 120 Hz Pin-programmable PGA Gain: 1, 8, 64, 128 Pin-programmable power-down and reset RMS noise: 15 nV @ 10 Hz (gain = 128) Up to 21.5 noise free bits (gain = 1) Internal or external clock Bridge power-down switch Offset drift: 5 nV/°C Gain drift: 1 ppm/°C Specified drift over time Simultaneous 50 Hz/60 Hz rejection Internal temperature sensor Power supply: 3 V to 5.25 V Current: 4.35 mA Temperature range:.
  • 40°C to +105°.

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Other Datasheets by Analog Devices

Part Number Description
AD7190 4.8 kHz Ultra-Low Noise 24-Bit Sigma-Delta ADC
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AD7195 24-BIT SIGMA-DELTA ADC

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Pin-Programmable, Ultralow Noise, 24-Bit, Sigma-Delta ADC for Bridge Sensors AD7191 FEATURES Pin-programmable output rate Output data rate: 10 Hz, 50 Hz, 60 Hz, 120 Hz Pin-programmable PGA Gain: 1, 8, 64, 128 Pin-programmable power-down and reset RMS noise: 15 nV @ 10 Hz (gain = 128) Up to 21.5 noise free bits (gain = 1) Internal or external clock Bridge power-down switch Offset drift: 5 nV/°C Gain drift: 1 ppm/°C Specified drift over time Simultaneous 50 Hz/60 Hz rejection Internal temperature sensor Power supply: 3 V to 5.25 V Current: 4.35 mA Temperature range: –40°C to +105°C Package: 24-lead TSSOP GENERAL DESCRIPTION The AD7191 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) ADC.