AD8217BRMZ

Overview

The AD8217BRMZ is a high-voltage, high-resolution current shunt amplifier from Analog Devices. It features a fixed gain of 20 V/V and utilizes a zero-drift architecture to maintain an input offset voltage typical of ±100 μV and drift of ±100 nV/°C across the -40°C to +125°C temperature range. The device supports a common-mode voltage range of 4.5 V to 80 V with a maximum gain error of ±0.35%. An internal LDO allows operation from a single supply within this range, eliminating the need for additional power rails. The buffered output interfaces directly with standard converters.

Feature Summary

• Zero-drift core technology ensures minimal offset drift over temperature and common-mode voltage variations
• Integrated low-dropout regulator enables direct powering from the high-voltage common-mode rail
• High common-mode rejection performance across a wide voltage range without external supplies

Applications

• Motor control systems
• Battery management applications
• Base station power amplifier bias control
• High-end current sensing in telecom equipment

Procurement Notes

Verify the specific suffix R7 against procurement requirements if reel packaging is mandated, as the base model may denote tape-and-reel or cut-tape variants depending on distributor configuration. Confirm RoHS compliance status and lead times through authorized channels. Ensure the operating temperature range meets system specifications given the industrial rating. Cross-reference pinout compatibility with existing PCB layouts before finalizing orders.

Selection Notes

Select this component when unidirectional current measurement is required at high common-mode voltages up to 80 V. The fixed 20 V/V gain suits applications where signal conditioning matches ADC input ranges directly. Consider the zero-drift feature for precision measurements requiring stability over wide thermal cycles. Evaluate the internal LDO benefit for simplifying power architecture compared to amplifiers requiring dual supplies.

Part Context

This part belongs to the AD8217 series of current sense amplifiers designed for high-side or low-side sensing in demanding environments. It differentiates itself by integrating the power supply regulation internally, reducing bill-of-materials complexity. The MSOP-8 package provides a compact solution for space-constrained industrial designs while maintaining thermal performance suitable for continuous operation.

Replacement Considerations

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