LT1002C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1002C' PDF : 16 Pages View PDF
LT1002
APPLICATIONS INFORMATION
Two Op Amp Instrumentation Amplifier
R1
100k*
–
INPUTS
+
R5
2.2k+
R2
10k
–
R3
1/2 LT1002
+
10k
R4
100k
–
1/2 LT1002
+
* TRIM FOR COMMON-MODE REJECTION
+ TRIM FOR GAIN
( ) Gain = R4 1 + 1 R2 + R3 + R2 + R3 ≈ 100
R3
2 R1 R4
R5
OUTPUT
1002 TA10
Precision Amplifier Drives 500Ω Load to ±10V
RS
100Ω
RS
100Ω
1.1Rf + 0.1RS
110k
+15
–
B
1/2 LT1002
+
–15V
100Ω
0.2RL
Rf
100k
+15V
–
A
1/2 LT1002
+
–15V
500Ω
OUTPUT
RL
INPUT
1002 TA11
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 RL is
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.
12
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