Precision, Unity-Gain
Differential Amplifier
a
AMP03
FEATURES
FUNCTIONAL BLOCK DIAGRAM
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
AMP03
25k⍀
25k⍀
2
–IN
5
7
6
4
1
SENSE
+V
CC
OUTPUT
APPLICATIONS
Summing Amplifiers
Instrumentation Amplifiers
Balanced Line Receivers
–V
EE
25k⍀
25k⍀
+IN
3
REFERENCE
Current-Voltage Conversion
Absolute Value Amplifier
4 to 20 mA Current Transmitter
Precision Voltage Reference Applications
Lower Cost and Higher Speed Version of INA105
PIN CONNECTIONS
8-Lead PDIP
(P Suffix)
GENERAL DESCRIPTION
1
2
3
4
8
7
6
5
REFERENCE
NC
V+
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.
AMP03
TOP VIEW
(Not to Scale)
–IN
+IN
V–
OUTPUT
SENSE
NC = NO CONNECT
8-Lead SOIC
(S Suffix)
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.
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2
3
4
8
7
6
5
NC
REFERENCE
AMP03
TOP VIEW
(Not to Scale)
–IN
+IN
V–
V+
OUTPUT
SENSE
NC = NO CONNECT
Header
(J Suffix)
NC
8
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.
REFERENCE 1
–IN 2
7 V+
6 OUTPUT
5 SENSE
+IN 3
4
V–
NC = NO CONNECT
REV. F
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