Datasheet

12
LT1002
1002fb
Two Op Amp Instrumentation Amplifier
+
–
1002 TA10
R3
10k
R1
100k*
R2
10k
R4
100k
–
+
OUTPUT
* TRIM FOR COMMON-MODE REJECTION
†
TRIM FOR GAIN
GAIN = 1 + + + ≈ 100
INPUTS
1/2
LT1002
–
+
1/2
LT1002
R5
2.2k
†
R4
R3
R2 + R3
R5
R3
R4
R2
R1
1
2
()
Precision Amplifier Drives 500Ω Load to ±10V
This application utilizes the guaranteed 10mA load driving
capability of the LT1002. The offset voltage of amplifier A
is the offset of the configuration. Amplifier B provides the
additional 10mA load current. When load resistor R
L
is
15V
–15V
15V
–15V
1002 TA11
INPUT
OUTPUT
1.1R
f
+ 0.1R
S
110k
R
S
100Ω
0.2R
L
100Ω
R
f
100k
R
L
500Ω
R
S
100Ω
–
+
B
1/2 LT1002
–
+
A
1/2 LT1002
APPLICATIONS INFORMATION
WUU
U
removed, amplifier A sinks this current without affecting
accuracy. In the gain of 1000 configuration shown, ap-
proximately 0.3% gain accuracy can be realized.