Analog Devices Inc. AD8219BRMZ

Overview

AD8219BRMZ from Analog Devices is a zero-drift, unidirectional current shunt monitor IC designed for high-side current sensing in industrial and telecom power systems. It delivers 60 V/V fixed gain, ±50 µV typical input offset, ±100 nV/°C offset drift, and operates across 4 V to 80 V common-mode voltage range - enabling precise measurement of load current through a shunt resistor in 48 V telecom power supplies.

For engineers reviewing the AD8219BRMZ datasheet, AD8219BRMZ pinout, AD8219BRMZ application, or AD8219BRMZ equivalent, this device supports high-accuracy, temperature-stable current monitoring where input common-mode voltage exceeds standard op-amp limits and output must interface directly with ADCs without level-shifting.

Technical Context

The AD8219BRMZ implements a precision difference amplifier core with matched 1.5 MΩ/25 kΩ resistor network (60× gain), integrated LDO, and internal output clamping at 5.6 V. Its zero-drift architecture ensures stable dc accuracy over −40°C to +125°C.

It rejects common-mode voltages from 4 V to 80 V while maintaining 110 dB CMRR at dc and 94 dB minimum across temperature; differential input range is 0–83 mV, and output drives 25 kΩ loads with 2 Ω impedance and 1 V/µs slew rate.

Key Specifications

Pinout & Package

The AD8219BRMZ is housed in an 8-lead MSOP package (JEDEC MO-187-AA, RM-8), with 0.65 mm pitch and exposed pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current shunt monitor applications.

Compared with INA240A1QDRQ1 and MAX4080TASA+, the AD8219BRMZ offers superior offset drift (±100 nV/°C vs. ±200 nV/°C and ±300 nV/°C) and integrated LDO simplification, making it optimal for cost-sensitive, unidirectional 48 V telecom and industrial power monitoring where minimal BOM count and thermal stability are prioritized.

Availability

AD8219BRMZ is available at Aetrix Electronics and suitable for 48 V telecom power monitoring, base station amplifier bias control, and unidirectional motor control requiring stable component supply across extended temperature and high common-mode voltage conditions.

Supply support for AD8219BRMZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and healthcare markets.

The AD8219 belongs to Analog Devices' precision current sense amplifier product line, engineered specifically for high-accuracy, high common-mode voltage current measurement in harsh thermal and electrical environments.

FAQ

What is the maximum common-mode voltage the AD8219BRMZ can withstand continuously?

The AD8219BRMZ supports continuous common-mode input voltages from 4 V to 80 V. Its absolute maximum rating extends to +85 V at +IN and −IN pins, but sustained operation above 80 V is not specified and may impact long-term reliability or accuracy. For robust design, limit common-mode voltage to the 4 V–80 V operational range defined in the datasheet.

Can the AD8219BRMZ operate with VS tied directly to the +IN pin?

Yes, the AD8219BRMZ supports VS tied directly to +IN - this configuration uses the internal LDO to power the amplifier core from the sensed common-mode voltage. This eliminates the need for a separate supply and is commonly used in battery-referenced shunt applications, provided the common-mode voltage remains within 4 V–80 V.

Does the AD8219BRMZ provide bidirectional current sensing capability?

No, the AD8219BRMZ is explicitly a unidirectional current shunt monitor. Its architecture and output stage are optimized for positive differential inputs only (0–83 mV), and it does not support negative current flow interpretation. For bidirectional sensing, consider alternatives like the INA240 series.

What is the purpose of the internal output clamping in the AD8219BRMZ?

The AD8219BRMZ clamps its output at 5.6 V when the +IN pin voltage exceeds 5.6 V, protecting downstream analog-to-digital converters from overvoltage damage. When +IN is below 5.6 V, the output reaches up to VS − 0.1 V - ensuring safe interfacing with 5 V or lower ADC reference rails without external clamping diodes.

How does the zero-drift architecture improve performance of the AD8219BRMZ in industrial applications?

The zero-drift core in the AD8219BRMZ reduces offset drift to ±100 nV/°C, minimizing calibration drift over temperature. In industrial systems operating from −40°C to +125°C, this translates to <±0.3 mV total offset variation - preserving measurement accuracy in furnace controls, power supplies, and motor drives without periodic recalibration.