AD7787BRM-REEL

Overview

The AD7787BRM-REEL is a low-power, complete analog front end for low-frequency measurement applications. It integrates a 24-bit Sigma-Delta ADC with one differential input (AIN1) and one single-ended input (AIN2). The device operates from an internal clock oscillator, eliminating the need for external clock sources. It supports software-programmable output data rates ranging from 9.5 Hz to 120 Hz. Power supply voltage ranges from 2.5 V to 5.25 V, with normal mode current consumption of 75 µA maximum and power-down mode current of 1 µA maximum. The part features rail-to-rail input buffering, simultaneous 50 Hz and 60 Hz rejection, and a VDD monitor channel.

Feature Summary

• Integrates a low-noise 24-bit Sigma-Delta modulator with an internal clock oscillator.
• Provides configurable rail-to-rail input buffering for differential and single-ended channels.
• Supports multiple serial interface protocols including SPI, QSPI, Microwire, and DSP modes.
• Includes programmable filter settings for simultaneous 50 Hz and 60 Hz line frequency rejection.

Applications

• Smart transmitters
• Battery-powered portable instrumentation
• Sensor measurement systems
• Weigh scales

Procurement Notes

Verify the specific ordering suffix REEL against the manufacturer's official documentation to confirm tape-and-reel packaging specifications. Ensure compatibility with the required operating temperature range of −40°C to +105°C. Confirm that the MSOP-10 package dimensions align with the target PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when designing low-frequency measurement circuits requiring high resolution and minimal power consumption. The integrated internal clock simplifies design by removing external crystal requirements. Consider the buffered versus unbuffered input configurations based on source impedance requirements to optimize noise performance and power usage.

Part Context

The AD7787 belongs to Analog Devices' family of low-power, 24-bit Sigma-Delta analog-to-digital converters. It is designed specifically for applications where power efficiency and precision are critical. The BRM variant indicates the commercial/industrial temperature range and MSOP-10 packaging. This series is commonly used in industrial process control and battery-operated devices.

Replacement Considerations

Consult the official Analog Devices datasheet for the most current replacement or pin-compatible alternatives. Verify functional equivalence regarding channel count, resolution, and interface compatibility before substitution.