AD7792BRUZ

Overview

The AD7792BRUZ 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. With a gain setting of 64, the rms noise is 40 nV when the update rate equals 4.17 Hz. The device features a precision internal band gap reference, programmable excitation current sources, burnout currents, and a bias voltage generator. It operates with a power supply from 2.7 V to 5.25 V, consumes 400 μA typical current, and is housed in a 16-lead TSSOP package.

Feature Summary

• Low noise programmable gain instrumentation amplifier
• Internal clock oscillator with simultaneous 50 Hz/60 Hz rejection
• Programmable excitation current sources and burnout currents
• On-chip bias voltage generator

Applications

• Thermocouple measurements
• RTD measurements
• Industrial process control
• Portable instrumentation
• Smart transmitters

Procurement Notes

Verify the specific ordering suffix BRUZ corresponds to the 16-lead TSSOP package variant. Confirm that the B version meets the required temperature range specifications of -40°C to +105°C. Ensure compatibility with the intended digital interface protocol before procurement.

Selection Notes

Select this component for applications requiring a 16-bit resolution ADC with integrated signal conditioning. Consider the AD7793 if higher 24-bit resolution is necessary. Evaluate the trade-off between output data rate and noise performance based on the specific gain settings required for the application.

Part Context

The AD7792 is part of the AD7792/AD7793 family of complete analog front ends designed for high precision measurement applications. It shares architectural similarities with other sigma-delta ADCs but distinguishes itself through its integrated low noise instrumentation amplifier and internal reference capabilities within a compact 16-lead TSSOP package.

Replacement Considerations

The AD7793 serves as a direct functional substitute offering 24-bit resolution instead of 16-bit. Both devices share identical pinouts, packages, and core functionalities, allowing for potential drop-in replacements where higher resolution is beneficial.