High Voltage

Current Shunt Monitor

AD8211

Rev. A

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FEATURES

Qualified for automotive applications

±4000 V HBM ESD

High common-mode voltage range

−2 V to +65 V operating

−3 V to +68 V survival

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 drift

120 dB typical 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 measure-

ments 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.