AD8218BRMZ

Overview

The AD8218BRMZ is a ZeroDrift BiDirectional Current Sense Amplifier manufactured by Analog Devices Inc. It features a single channel with a gain-bandwidth product of 200 kHz and supports a common-mode voltage range from 4 V to 80 V. The device offers a common-mode rejection ratio of 90 dB and a power supply rejection ratio of 90 dB. Input bias current is specified at 220 uA, while input offset voltage is 200 uV. Operating on a supply voltage between 4 V and 80 V, it consumes 800 uA of quiescent current. Gain error and accuracy are both rated at 0.1%. The component operates within a temperature range of -40 C to +125 C and is housed in an MSOP-8 surface-mount package.

Feature Summary

• Zero-drift architecture ensures high precision and stability over temperature variations
• Bi-directional capability allows accurate measurement of current flow in both directions
• High common-mode voltage range supports operation in high-side sensing applications up to 80 V

Applications

• High-side current monitoring in industrial systems
• Battery management system current sensing
• Motor control circuit protection and feedback

Procurement Notes

Verify the specific suffix 'BRMZ' against official Analog Devices documentation to confirm the exact package type and temperature grade. Ensure compatibility with the required operating voltage range and common-mode voltage levels for the target application. Cross-reference the manufacturer part number directly with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when bidirectional current sensing is required with high common-mode voltage tolerance. The zero-drift technology minimizes offset drift, making it suitable for precision applications where low gain error is critical. Consider the MSOP-8 package constraints for PCB layout and thermal dissipation requirements relative to the 800 uA supply current.

Part Context

This device belongs to the AD8218 series of current sense amplifiers. It is designed for applications requiring accurate current measurement in environments with high common-mode voltages. The series utilizes chopper stabilization techniques to achieve low offset voltage and drift characteristics compared to standard amplifier architectures.

Replacement Considerations

Consult Analog Devices documentation for verified substitute part numbers within the same family or compatible alternatives.