Datasheet

12
LT1013/LT1014
10134fb
5V Powered Precision Instrumentation Amplifier
–
+
LT1014
6
5
–
+
LT1014
2
3
7
1
200k*
200k*
RG (TYP 2k)
†
†
†
†
+5V
+5V
20k
20k
–INPUT
+INPUT
–
+
LT1014
13
12
14
10k
10k
10k*
10k*
10k*
10k*
OUTPUT
4
11
+5V
–
+
LT1014
9
10
8
TO
INPUT
CABLE SHIELDS
1% FILM RESISTOR. MATCH 10k's 0.05%
GAIN EQUATION: A = + 1.
FOR HIGH SOURCE IMPEDANCES,
USE 2N2222 AS DIODES.
400,000
RG
*
†
1µF
1013/14 TA07
9V Battery Powered Strain Gauge Signal Conditioner
–
+
LT1014
13
12
14
–
+
LT1014
6
5
7
–
+
LT1014
9
10
8
100k
100k
499
499
350Ω
STRAIN GAUGE
BRIDGE
TO A/D RATIO
REFERENCE
2N2219
330Ω
0.01
4.7k
47µF
+9V
TO A/D
22M
–
+
LT1014
2
3
1
1N4148
100k
100k100k
0.068
15k
0.068
0.068
15k
3k
15
14
7
6
13
9
+9V
TO A/D
CONVERT COMMAND
1
5
+9V
4
11
74C221
+9V
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.
1013/14 TA08
TYPICAL APPLICATIO S
U