High Common-Mode Voltage,

Single-Supply Difference Amplifier

AD8202

Rev. D

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FEATURES

High common-mode voltage range

−8 V to +28 V at a 5 V supply voltage

Operating temperature range: −40°C to +125°C

Supply voltage range: 3.5 V to 12 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 min dc to 10 kHz

APPLICATIONS

Transmission control

Diesel injection control

Engine management

Adaptive suspension control

Vehicle dynamics control

GENERAL DESCRIPTION

The AD8202 is a single-supply difference amplifier for amplifying

and low-pass filtering small differential voltages in the presence of a

large common-mode voltage (CMV). The input CMV range

extends from −8 V to +28 V at a typical supply voltage of 5 V.

The AD8202 is available in die and packaged form. The MSOP

and SOIC packages are specified over a wide temperature range,

from −40°C to +125°C, making the AD8202 well-suited for use

in many automotive platforms.

Automotive platforms demand precision components for

better system control. The AD8202 provides excellent ac and

dc performance keeping errors to a minimum in the user’s

system. Typical offset and gain drift in the SOIC package are

0.3 μV/°C and 1 ppm/°C, respectively. Typical offset and gain

drift in the MSOP package are 2 μV/°C and 1 ppm/°C, respec-

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

from dc to 10 kHz.

The AD8202 features an externally accessible 100 kΩ resistor

at the output of the Preamp A1 that can be used for low-pass

filter applications and for establishing gains other than 20.

FUNCTIONAL BLOCK DIAGRAMS

A1

+IN

–IN

200k

Ω

200k

Ω

100k

Ω

A2

+IN

–IN

G =

×10

G =

×2

AD8202

10k

Ω

10k

Ω

+IN

–IN

GND

OUT

NC

A1

A2

NC = NO CONNECT

2

5

6

4

7

8

1

3

Figure 1. SOIC (R) Package Die Form

GND

NC

–IN

+IN

A1

A2

OUT

AD8202

5V

OUTPUT

INDUCTIVE

LOAD

POWER

DEVICE

4-TERM

SHUNT

CLAMP

DIODE

BATTERY

14V

COMMON

NC = NO CONNECT

Figure 2. High Line Current Sensor

GND

NC

–IN

+IN

A1

A2

OUT

AD8202

5V

OUTPUT

INDUCTIVE

LOAD

POWER

DEVICE

4-TERM

SHUNT

CLAMP

DIODE

BATTERY

14V

COMMON

NC = NO CONNECT

Figure 3. Low Line Current Sensor