AD7799BRUZ

Overview

The AD7799BRUZ is a low power, low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit Σ-Δ ADC with three differential analog inputs and an on-chip low noise instrumentation amplifier. The device operates with a power supply from 2.7 V to 5.25 V and consumes 380 µA typical current. Key specifications include 27 nV RMS noise at 4.17 Hz (Gain = 64), simultaneous 50 Hz/60 Hz rejection, and an update rate ranging from 4.17 Hz to 470 Hz. It features an internal clock oscillator, reference detect, low-side power switch, programmable digital outputs, and burnout currents.

Feature Summary

• Integrates a 24-bit Sigma-Delta ADC with three differential analog inputs and a low-noise programmable gain instrumentation amplifier.
• Includes on-chip features such as an internal clock oscillator, reference voltage detection, and a low-side power switch.
• Supports software-programmable output data rates from 4.17 Hz to 470 Hz with simultaneous 50 Hz/60 Hz line frequency rejection.
• Provides programmable digital output pins and burnout currents for enhanced sensor diagnostics and system control.

Applications

• Weigh scales
• Pressure measurement
• Strain gauge transducers
• Gas analysis
• Industrial process control

Procurement Notes

Verify the specific ordering suffix against official Analog Devices documentation to confirm package type and reel specifications. Ensure the component matches the required temperature range and performance grade for your application environment.

Selection Notes

Select this component when high resolution and low noise are critical for small amplitude signals. Consider the integrated PGA and reference circuitry to simplify external component requirements compared to discrete solutions.

Part Context

The AD7799BRUZ belongs to the AD7798/AD7799 family of complete analog front ends. It shares the same package and interface characteristics as the AD7798 but offers higher 24-bit resolution and lower noise performance suitable for more demanding precision measurement tasks.

Replacement Considerations

The AD7798 is a compatible alternative within the same family, offering 16-bit resolution. Verify if the reduced resolution meets your system accuracy requirements before substituting.