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a

AMP03

Precision, Unity-Gain

Differential Amplifier

FEATURES

High CMRR: 100 dB Typ

Low Nonlinearity: 0.001% Max

Low Distortion: 0.001% Typ

Wide Bandwidth: 3 MHz Typ

Fast Slew Rate: 9.5 V/ s Typ

Fast Settling (0.01%): 1

s Typ

Low Cost

APPLICATIONS

Summing Amplifiers

Instrumentation Amplifiers

Balanced Line Receivers

Current-Voltage Conversion

Absolute Value Amplifier

4to 20 mA Current Transmitter

Precision Voltage Reference Applications

Lower Cost and Higher Speed Version of INA105

GENERAL DESCRIPTION

The AMP03 is a monolithic unity-gain, high speed differential

amplifier. Incorporating a matched thin film resistor network,

the AMP03 features stable operation over temperature without

requiring expensive external matched components. The AMP03

is a basic analog building block for differential amplifier and

instrumentation applications.

The differential amplifier topology of the AMP03 both amplifies

the difference between two signals and provides extremely high

rejection of the common-mode input voltage. By providing

common-mode rejection (CMR) of 100 dB typical, the AMP03

solves common problems encountered in instrumentation design.

As an example, the AMP03 is ideal for performing either addi-

tion or subtraction of two signals without using expensive

externally matched precision resistors. The large common-mode

rejection is made possible by matching the internal resistors to

better than 0.002% and maintaining a thermally symmetric

layout. Additionally, due to high CMR over frequency, the

AMP03 is an ideal general amplifier for buffering signals in a

noisy environment into data acquisition systems.

The AMP03 is a higher speed alternative to the INA105.

Featuring slew rates of 9.5 V/

µs and a bandwidth of 3 MHz, the

AMP03 offers superior performance to the INA105 for high

speed current sources, absolute value amplifiers, and summing

amplifiers.

FUNCTIONAL BLOCK DIAGRAM

–IN

+IN

SENSE

OUTPUT

REFERENCE

25k

25k

25k

25k

6

7

1

2

3

4

5

AMP03

PIN CONNECTIONS

8-Lead PDIP

(P Suffix)

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

NC = NO CONNECT

AMP03

REFERENCE

SENSE

OUTPUT

V+

NC

–IN

+IN

V–

8-Lead SOIC

(S Suffix)

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

NC = NO CONNECT

AMP03

REFERENCE

SENSE

OUTPUT

V+

NC

–IN

+IN

V–

Header

(J Suffix)

8

REFERENCE 1

–IN 2

+IN 3

7 V+

6 OUTPUT

5 SENSE

4

V–

NC

NC = NO CONNECT