AD7789BRM-REEL

Overview

The AD7789BRM-REEL is a low power, 24-bit Sigma-Delta analog-to-digital converter (ADC) from Analog Devices Inc. It operates on a single supply voltage ranging from 2.5 V to 5.25 V and features an internal clock oscillator that provides a fixed output update rate of 16.6 Hz. This update rate ensures simultaneous rejection of both 50 Hz and 60 Hz line frequencies. The device incorporates one differential analog input channel and utilizes an external reference voltage. It communicates via a 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards. The component is housed in a 10-lead MSOP package.

Feature Summary

• Integrated Sigma-Delta architecture with internal clocking for simplified system design
• Low power consumption with dedicated power-down mode capability
• Differential analog input with integrated digital filtering for noise rejection
• Versatile serial interface supporting multiple communication protocols

Applications

• Smart transmitters
• Battery-powered instrumentation
• Portable measurement devices
• Sensor signal conditioning
• Weigh scales

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and lead-free material declarations prior to integration. Ensure the source document matches the exact part number to avoid discrepancies in electrical characteristics or pinout definitions.

Selection Notes

Select this component for applications requiring high resolution at low data rates with minimal power consumption. The fixed 16.6 Hz update rate makes it suitable for environments where 50/60 Hz interference rejection is critical without additional software filtering. Consider the external reference requirement when designing the analog front end.

Part Context

This component belongs to the AD7788/AD7789 family of low-power, low-noise analog front ends designed for precision measurement. The AD7789 represents the 24-bit resolution variant within this series, sharing the same physical footprint and interface logic as the 16-bit AD7788. Both devices target low-frequency sensor measurements.

Replacement Considerations

The AD7788 serves as a lower-resolution alternative within the same package and feature set. Verify compatibility if a reduction in resolution is acceptable for the application.