High Voltage,

Precision Difference Amplifier

Known Good Die

AD8202-KGD

Rev. 0

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FEATURES

Qualified for automotive applications

High common-mode voltage range

−8 V to +28 V operating at 5 V supply

Buffered output voltage

Gain = 20 V/V

Low-pass filter (1-pole or 2-pole)

Excellent ac and dc performance

±1 mV voltage offset

1 ppm/°C typical gain drift

80 dB CMRR minimum dc to 10 kHz

Known good die (KGD): these die are fully

guaranteed to data sheet specifications

APPLICATIONS

High-side current sensing

Motor controls

Solenoid controls

Power management

Low-side current sensing

Diagnostic protection

FUNCTIONAL BLOCK DIAGRAM

OUT

+IN

–IN

GND

+

–

AD8202-KGD

G = 2

G = 10

A1

A2

+

–

Figure 1.

GENERAL DESCRIPTION

The AD8202-KGD is a single-supply difference amplifier ideal

for amplifying and low-pass filtering small differential voltages

in the presence of a large common-mode voltage. The input

common-mode voltage range extends from −8 V to +28 V at a

single +5 V supply. The AD8202-KGD is qualified for automotive

applications.

Automotive applications demand robust, precision components

for improved system control. The AD8202-KGD provides excellent

ac and dc performance, minimizing errors in the application.

Typical offset and gain drift are 5 µV/°C and 1 ppm/°C respect-

tively. The device also delivers a minimum CMRR of 80 dB from

dc to 10 kHz.

The AD8202-KGD features an externally accessible 100 kΩ resistor

at the output of the preamplifier (A1), which can be used for low-

pass filtering and for establishing gains other than 20.

Additional application and technical information can be found

in the AD8202 data sheet.