High Voltage,

Current Shunt Monitor

Data Sheet

AD8211

Rev. C

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FEATURES

Qualified for automotive applications

±4000 V human body model (HBM) electrostatic discharge (ESD)

High common-mode input voltage range: −2 V to +65 V

Continuous input voltage range: −3 V to +68 V

Buffered output voltage

Wide operating temperature range

5-lead SOT: −40°C to +125°C

Excellent ac and dc performance

5 µV/°C typical offset drift

−13 ppm/°C typical gain vs. temperature

120 dB typical common-mode rejection ratio (CMRR) at dc

APPLICATIONS

High-side current sensing

Motor controls

Transmission controls

Engine management

Suspension controls

Vehicle dynamic controls

DC-to-dc converters

FUNCTIONAL BLOCK DIAGRAM

V+

OUT

G = +20

AD8211

A1

PROPRIETARY

OFFSET

CIRCUITRY

GND

Figure 1.

GENERAL DESCRIPTION

The AD8211 is a high voltage, precision current shunt amplifier. It

features a set gain of 20 V/V, with a typical ±0.35% gain error

over the entire temperature range. The buffered output voltage

directly interfaces with any typical converter. Excellent common-

mode rejection from −2 V to +65 V is independent of the 5 V

supply. The AD8211 performs unidirectional current measurements

across a shunt resistor in a variety of industrial and automotive

applications, such as motor control, solenoid control, or battery

management.

Special circuitry is devoted to output linearity being maintained

throughout the input differential voltage range of 0 mV to 250 mV,

regardless of the common-mode voltage present. The AD8211

has an operating temperature range of −40°C to +125°C and is

offered in a small 5-lead SOT package.