AD8219BRMZ

Overview

The AD8219BRMZ is a high-voltage, zero-drift current shunt monitor manufactured by Analog Devices Inc. It features a fixed gain of 60 V/V and operates with a common-mode voltage range from 4 V to 80 V. The device offers excellent DC accuracy with a typical offset voltage of 50 µV and a maximum gain error of ±0.3% across the temperature range. It supports unidirectional current sensing and provides a buffered output compatible with standard analog-to-digital converters.

Feature Summary

• Zero-drift architecture ensures low offset voltage and minimal drift over temperature
• High common-mode voltage capability up to 80 V for high-side sensing
• Fixed internal gain of 60 V/V simplifies circuit design
• Buffered output directly interfaces with data converters

Applications

• High-side current sensing in industrial systems
• 48 V telecom power monitoring
• Power management circuits
• Base station power amplifier bias control
• Unidirectional motor control

Procurement Notes

Verify the specific suffix BRMZ corresponds to the MSOP-8 package and temperature grade when ordering. Confirm availability status as distribution channels may indicate limited stock or regional restrictions. Ensure the application requires unidirectional sensing, as this part does not support bidirectional measurement. Cross-reference the datasheet revision to confirm pinout and electrical specifications match the design requirements.

Selection Notes

Select the AD8219BRMZ for applications requiring high common-mode voltage rejection without external precision resistors. The fixed 60 V/V gain is suitable for signals where the shunt voltage is small relative to the common-mode potential. Consider the unidirectional nature of the output if negative currents are present. Compare against the AD8218 if bidirectional sensing is required instead.

Part Context

This component belongs to the AD8219 series of high-voltage current shunt monitors. It is designed for precision measurements in environments with high common-mode voltages. The device integrates a precision reference and matched resistors to achieve high accuracy without external components. It is part of Analog Devices' portfolio of signal chain solutions for industrial and telecommunications markets.

Replacement Considerations

The AD8218BRMZ is a related device but supports bidirectional current sensing, whereas the AD8219 is unidirectional only. Direct substitution requires verifying that the application does not require negative current measurement. Other family members may offer different gains or voltage ranges.