AD7732BRUZ

Overview

The AD7732BRUZ is a high precision, high throughput analog front end featuring two fully differential analog inputs with an input range of ±10 V. It integrates a 24-bit Sigma-Delta ADC capable of up to 15.4 kS/s sampling rate. The device operates from a single +5 V analog supply and supports 3 V or 5 V digital supplies. It includes on-chip system calibration, overvoltage tolerance up to ±16.5 V without adjacent channel degradation, and a 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP systems.

Feature Summary

• Features two fully differential analog input channels supporting unipolar or true bipolar ranges up to ±10 V.
• Includes on-chip per-channel system calibration and offset/gain error reduction capabilities.
• Accepts analog input overvoltage up to ±16.5 V without degrading the performance of adjacent channels.
• Supports configurable digital filtering and chopping modes to optimize noise performance against data throughput.

Applications

• PLCs/DCS
• Multiplexing applications
• Process control
• Industrial instrumentation

Procurement Notes

Verify the component revision (Rev. A) matches the design requirements. Confirm that the TSSOP-28 package dimensions align with the PCB footprint. Ensure the external master clock frequency does not exceed the specified maximum for the desired output data rate. Check that the reference voltage configuration meets the required accuracy specifications.

Selection Notes

Select this component when high resolution multiplexing is required with fast channel switching times. Consider the AD7734 if four single-ended channels are needed instead of two differential channels. Evaluate the power consumption differences between chopping enabled and disabled modes based on the specific noise and throughput requirements of the application.

Part Context

The AD7732 belongs to the AD773x family of high-performance analog-to-digital converters. It is designed for applications requiring high precision and fast data acquisition. Other members of the family include the AD7734 with four single-ended channels and the AD7738 with configurable differential or single-ended inputs.

Replacement Considerations

The AD7734 is a similar part but features four single-ended input channels instead of two differential channels. The AD7738 offers configurable input channels and different common-mode voltage ranges. Verify pin compatibility and register map similarities before substituting these parts.