AD7731BRUZ-REEL

Overview

The AD7731BRUZ-REEL is a 24-bit sigma-delta analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features three buffered differential programmable gain analog inputs, configurable as five pseudo-differential inputs. The device operates from a single +5 V analog supply and accepts digital logic voltages between 2.7 V and 5.25 V. It supports output data rates up to 6.4 kHz with a peak-to-peak resolution of 16 bits at 800 Hz. The component utilizes an external reference input and includes self-calibration capabilities. It is housed in a 24-lead TSSOP package and is supplied in reel packaging.

Feature Summary

• Features a proprietary programmable gain front end accepting low-level transducer signals directly.
• Includes a two-stage digital filter allowing adjustment of cutoff frequency, output rate, and settling time.
• Supports FASTStep mode for rapid channel sequencing with 1 ms settling time.
• Provides internal self-calibration and system calibration options to minimize offset and gain drift.

Applications

• Process control systems
• Programmable Logic Controllers (PLCs)
• Distributed Control Systems (DCS)
• Industrial instrumentation

Procurement Notes

Verify the specific ordering suffix REEL against the manufacturer's current documentation to confirm tape-and-reel packaging specifications. Ensure the B version temperature range (-40°C to +85°C) matches the operational requirements. Confirm RoHS compliance status via the Z suffix if required, although the base model indicates standard compliance.

Selection Notes

Select this component when high-resolution signal acquisition from multiple differential channels is required. The integrated buffer amplifier allows for significant external source impedances. Consider the available unipolar and bipolar input ranges, which span from ±20 mV to ±1.28 V, to match the transducer output characteristics without external amplification.

Part Context

The AD7731 belongs to the Analog Devices AD7731 series of low-noise, high-throughput 24-bit sigma-delta ADCs. This family is designed for industrial applications requiring precise analog front-end processing. The BRUZ-REEL designation specifically identifies the commercial temperature grade variant packaged in a 24-lead TSSOP format on a continuous reel for automated surface-mount assembly.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.