Datasheet

LT1124/LT1125
18
11245fe
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1992
LT 1010 REV E • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LT1007 Single Low Noise, Precision Op Amp 2.5nV/√Hz 1kHz Voltage Noise
LT1028/LT1128 Single Low Noise, Precision Op Amps 0.85nV/√Hz Voltage Noise
LT1112/LT1114 Dual/Quad Precision Picoamp Input 250pA Max I
B
LT1113 Dual Low Noise JFET Op Amp 4.5nV/√Hz Voltage Noise, 10fA/√Hz Current Noise
LT1126/LT1127 Decompensated LT1124/LT1125 11V/µs Slew Rate
LT1169 Dual Low Noise JFET Op Amp 6nV/√Hz Voltage Noise, 1fA/√Hz Current Noise, 10pA Max I
B
LT1792 Single LT1113 4.2nV/√Hz Voltage Noise, 10fA/√Hz Current Noise
LT1793 Single LT1169 6nV/√Hz Voltage Noise, 1fA/√Hz Current Noise, 10pA Max I
B
1124/25 TA05
–
+
–
+
–
+
LT1009
3
2
2.5V
5k
1/4
LT1125
1k
–15V
15V
1
REFERENCE
OUTPUT
15V
–15V
7
4
13
6
5
10k
ZERO
TRIM
301k*
350
BRIDGE
1µF 301k*
0V TO 10V
OUTPUT
499*
GAIN
TRIM
50k
*RN60C FILM RESISTORS
1k
14
–15V
15V
13
12
THE LT1124/LT1125 IS CAPABLE OF PROVIDING EXCITATION CURRENT DIRECTLY
TO BIAS THE 350 BRIDGE AT 5V WITH ONLY 5V ACROSS THE BRIDGE (AS OPPOSED
TO THE USUAL 10V) TOTAL POWER DISSIPATION AND BRIDGE WARM-UP DRIFT IS
REDUCED. THE BRIDGE OUTPUT SIGNAL IS HALVED, BUT THE LT1124/LT1125 CAN
AMPLIFY THE REDUCED SIGNAL ACCURATELY.
1/4
LT1125
1/4
LT1125
Strain Gauge Signal Conditioner with Bridge Excitation