AD7783BRUZ-REEL7

Overview

The AD7783BRUZ-REEL7 is a read-only, pin-configured 24-bit sigma-delta analog-to-digital converter (ADC) from Analog Devices Inc. It features a single fully differential input channel with programmable gain amplifier (PGA) ranges of ±160 mV or ±2.56 V using a 2.5 V reference. The device integrates two 200 mA excitation current sources and operates at a fixed update rate of 19.79 Hz, providing simultaneous 50 Hz and 60 Hz rejection. It supports 3 V or 5 V single-supply operation, consuming 1.3 mA in normal mode and 9 μA in power-down mode. The component utilizes a simple serial interface compatible with SPI, QSPI, Microwire, and DSP standards, available in a 16-lead TSSOP package.

Feature Summary

• Pin-configurable architecture eliminates the need for programmable registers, simplifying system integration.
• Integrated dual 200 mA constant current sources enable direct excitation of resistive bridge sensors and RTDs.
• Fixed digital filter provides inherent simultaneous rejection of 50 Hz and 60 Hz line frequencies.

Applications

• Weigh scales
• Industrial process control
• Temperature measurement
• Pressure measurement

Procurement Notes

Verify the specific ordering suffix to confirm packaging format. The REEL7 suffix indicates tape and reel packaging suitable for automated surface-mount assembly. Confirm RoHS compliance status as indicated by the Z suffix in related part numbers. Ensure the procurement source provides valid traceability documentation for this discontinued or end-of-life component variant.

Selection Notes

Select this component when a single-channel, high-resolution ADC with integrated sensor excitation is required. The fixed 19.79 Hz output rate suits low-frequency measurements where line noise rejection is critical. Choose between master and slave modes based on the host controller's clocking capabilities. Ensure the application voltage range matches the selected RANGE pin configuration.

Part Context

This part belongs to the AD778x family of precision ADCs. Unlike the AD7782, which offers two channels but lacks integrated current sources, the AD7783 focuses on single-channel performance with built-in excitation capabilities. It is designed for applications requiring minimal external components and simplified software interfaces due to its read-only configuration structure.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material. Designers should consult official Analog Devices documentation for cross-reference recommendations or evaluate similar devices within the AD778x family that match channel count and interface requirements.