LT1124/LT1125
20
11245ff
For more information www.linear.com/LT1124
LINEAR TECHNOLOGY CORPORATION 1992
LT 0114 REV F • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LT1124
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
–
+
–
+
–
+
3
2
2.5V
5k
1/4
LT1125
1k
–15V
1
REFERENCE
OUTPUT
15V
–15V
7
4
13
6
5
10k
ZERO
TRIM
301k*
350Ω
BRIDGE
1µF 301k*
0V TO 10V
OUTPUT
499Ω*
GAIN
TRIM
50k
*RN60C FILM RESISTORS
1k
14
15V
13
12
THE LT1124/LT1125 IS CAPABLE OF PROVIDING EXCITATION CURRENT DIRECTLY
TO BIAS THE 350Ω 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
