LT1013 Datasheet, PDF (11/20 Pages) Linear Technology – Quad Precision Op Amp

TYPICAL APPLICATIONS
5V Powered Precision Instrumentation Amplifier
LT1013/LT1014
0.068
TO
INPUT
8
CABLE SHIELDS
9
LT1014
10
20k
–INPUT
1µF
20k
+INPUT
+5V
†
†
†
†
+5V
200k*
2^–
1
LT1014
3+
RG (TYP 2k)
200k*
6^–
7
LT1014
5+
10k*
10k*
+5V
10k
13 ^{– 4}
LT1014
12 +
10k
11
10k* 10k*
14
OUTPUT
*1% FILM RESISTOR. MATCH 10k's 0.05%
GAIN EQUATION: A =
400,000
RG
+
1.
†_{FOR HIGH SOURCE IMPEDANCES,}
USE 2N2222 AS DIODES.
15k
+9V
2^{– 4}
LT1014
3+
11
100k
+9V
15k
+9V
3k
9V Battery Powered Strain Gauge Signal Conditioner
+9V
1N4148 22M
1
4.7k
330Ω
47µF
2N2219
100k
0.01
TO A/D RATIO
REFERENCE
100k
100k
15
0.068
14
350Ω
STRAIN GAUGE
1
BRIDGE
13
6^–
LT1014
7 ⁴⁹⁹ 13 ^–
5+
LT1014
14
TO A/D
12 +
499
7 ^74C221
0.068
6
9
5
9^–
100k
LT1014
8
10 +
TO A/D
CONVERT COMMAND
SAMPLED OPERATION GIVES LOW AVERAGE OPERATING CURRENT ≈ 650µA.
4.7k–0.01µF RC PROTECTS STRAIN BRIDGE FROM LONG TERM DRIFTS DUE TO
HIGH ∆V/∆T STEPS.
11