AD7792BRU

Overview

The AD7792BRU is a low power, low noise, complete analog front end for high precision measurement applications. It contains a low noise 16-bit Σ-Δ ADC with three differential analog inputs and an on-chip, low noise instrumentation amplifier. The device features a precision internal band gap reference and supports external differential references. It operates with a power supply from 2.7 V to 5.25 V, consuming 400 μA typical current. The output data rate is software-programmable from 4.17 Hz to 470 Hz. It is housed in a 16-lead TSSOP package.

Feature Summary

• Low noise programmable gain instrumentation amplifier
• Internal clock oscillator
• Simultaneous 50 Hz/60 Hz rejection
• Programmable current sources

Applications

• Thermocouple measurements
• RTD measurements
• Thermistor measurements
• Gas analysis
• Industrial process control

Procurement Notes

Verify the specific ordering suffix BRU against official Analog Devices documentation to confirm pinout and package details. Ensure compatibility with system voltage requirements of 2.7 V to 5.25 V. Confirm interface protocol support for SPI or Microwire modes as required by the host microcontroller design.

Selection Notes

Select this component for applications requiring high precision with low power consumption. Consider the 16-bit resolution limit compared to the 24-bit AD7793 variant if higher effective resolution is needed. Evaluate the need for the internal reference versus an external precision reference based on drift requirements.

Part Context

The AD7792BRU belongs to the AD7792/AD7793 family of low power, low noise, complete analog front ends designed for high precision measurement applications. These devices integrate a Sigma-Delta ADC, instrumentation amplifier, and reference source into a single package.

Replacement Considerations

The AD7793BRU offers 24-bit resolution within the same package and feature set. For systems requiring more channels, the AD7794 provides six differential inputs.