LT1125 Linear Technology Corporation, LT1125 Datasheet - Page 16

• Manufacturer Part Number: LT1125
• Description: Dual/quad Low Noise, High Speed Precision Op Amps
• Manufacturer: Linear Technology Corporation

LT1124/LT1125
RELATED PARTS
TYPICAL
PART NUMBER
LT1007
LT1028/LT1128
LT1112/LT1114
LT1113
LT1126/LT1127
LT1169
LT1792
LT1793
16
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
LT1009
APPLICATION
DESCRIPTION
Single Low Noise, Precision Op Amp
Single Low Noise, Precision Op Amps
Dual/Quad Precision Picoamp Input
Dual Low Noise JFET Op Amp
Decompensated LT1124/LT1125
Dual Low Noise JFET Op Amp
Single LT1113
Single LT1169
5k
●
FAX: [phone]
2.5V
13
12
3
2
+
–
–
+
LT1125
LT1125
BRIDGE
1/4
1/4
–15V
–15V
350Ω
15V
15V
U
Strain Gauge Signal Conditioner with Bridge Excitation
●
14
www.linear.com
1
1k
1k
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.
*RN60C FILM RESISTORS
301k*
10k
ZERO
TRIM
COMMENTS
2.5nV/√Hz 1kHz Voltage Noise
0.85nV/√Hz Voltage Noise
250pA Max I
4.5nV/√Hz Voltage Noise, 10fA/√Hz Current Noise
11V/µs Slew Rate
6nV/√Hz Voltage Noise, 1fA/√Hz Current Noise, 10pA Max I
4.2nV/√Hz Voltage Noise, 10fA/√Hz Current Noise
6nV/√Hz Voltage Noise, 1fA/√Hz Current Noise, 10pA Max I
5
6
REFERENCE
OUTPUT
+
–
LT1125
1/4
–15V
15V
4
13
TRIM
GAIN
B
50k
7
1µF
© LINEAR TECHNOLOGY CORPORATION 1992
301k*
499Ω*
1124/25 TA05
LT/LT 0705 REV B • PRINTED IN USA
0V TO 10V
OUTPUT
B
B
11245fb