AD7732BRU

Overview

The AD7732BRU is a high precision, high throughput analog front end featuring two fully differential input channels. It provides true 16-bit peak-to-peak resolution with a total conversion time of 500 μs at 2 kHz channel switching. The device supports input ranges of +5 V, ±5 V, +10 V, and ±10 V while operating from a single +5 V analog supply. It accepts analog input overvoltage up to ±16.5 V without degrading adjacent channel performance. The part includes on-chip per-channel system calibration, overrange/underrange detection, and a "No-Reference" detect capability for the differential reference input.

Feature Summary

• Features two fully differential analog inputs with configurable unipolar or true bipolar ranges.
• Includes on-chip per-channel system calibration options to optimize noise performance against data throughput.
• Accepts analog input overvoltage up to ±16.5 V without affecting adjacent channel performance.
• Supports a simple digital serial interface compatible with microcontrollers and DSPs.

Applications

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

Procurement Notes

Verify the specific ordering suffix BRU corresponds to the 28-lead TSSOP package configuration. Confirm that the component meets the extended industrial temperature range specifications of –40°C to +105°C as defined in the datasheet. Ensure compatibility with the required 5 V analog supply and 3 V or 5 V digital supply voltages before integration into the design.

Selection Notes

Select this component for high-resolution multiplexing applications requiring fast channel switching. Consider the trade-off between noise performance and data throughput, which can be balanced via the digital interface up to 15.4 kHz. Verify that the input signal ranges fit within the supported ±10 V limits and that the system requires the specific overvoltage tolerance characteristics provided by this analog front end.

Part Context

The AD7732 belongs to a family that includes the AD7734 and AD7738. The AD7734 features four single-ended input channels, while the AD7738 offers configurable four fully differential or eight single-ended channels with external multiplexer output. Unlike these variants, the AD7732 is optimized for two fully differential inputs with high throughput capabilities.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.