AD8218BRMZ-R7

Overview

The AD8218BRMZ-R7 is a bidirectional current sense amplifier from Analog Devices, featuring ZeroDrift technology for high precision. It operates with a supply voltage range of 4 V to 80 V and supports common-mode voltages from 4 V to 80 V. Key electrical parameters include a gain bandwidth product of 200 kHz, input offset voltage of 200 µV, and input bias current of 220 µA. The device offers a common-mode rejection ratio of 90 dB and a gain error of 0.1%. It functions within an operating temperature range of -40°C to +125°C and is housed in an MSOP-8 package.

Feature Summary

• ZeroDrift architecture minimizes offset drift across the full operating temperature range
• Bidirectional sensing capability allows measurement of positive and negative currents
• Integrated low-dropout regulator enables operation directly from high-voltage rails

Applications

• High-side current monitoring in industrial systems
• Battery management systems
• Motor control applications

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when sourcing. Confirm the BRMZ variant meets the required industrial temperature grade and accuracy specifications for your design. Cross-reference the manufacturer datasheet for pinout compatibility and thermal performance data before finalizing procurement plans.

Selection Notes

Select this component for applications requiring accurate bidirectional current measurement under high common-mode voltages. The ZeroDrift feature ensures stability without external calibration. Ensure the system power supply remains within the 4 V to 80 V range and that the MSOP-8 package fits the PCB layout constraints.

Part Context

This part belongs to the AD8218 series of current sense amplifiers designed for high-voltage environments. It integrates precision analog front-end circuitry with zero-drift amplification to deliver reliable performance in demanding industrial and automotive settings where long-term stability is critical.

Replacement Considerations

Check for AD8218 variants with different suffixes such as ARMZ or KRZ for alternative temperature grades or packaging options. Verify functional equivalence with other high-voltage bidirectional current sense amplifiers if supply availability is constrained.