16

LT1007/LT1037

100737fa LT/TP 0297 5K REV A • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1985

Linear Technology Corporation

Strain Gauge Signal Conditioner with Bridge Excitation

6

4

7

3

2

7.5V

7.5V

–7.5V

6

4

7

–7.5V

1007/37 TA09

–

+

LT1007

–

+

LT1007

6

4

7

3

3

2

2

350

Ω

BRIDGE

OUTPUT

0V TO 10V

301k*

301k*

GAIN

TRIM

50k

ZERO

TRIM

10k

REFERENCE

OUT

1

µF

15V

–15V

499

Ω*

5k

2.5V

LT1009

LT1007

*RN60C FILM RESISTOR

THE LT1007 IS CAPABLE OF PROVIDING EXCITATION CURRENT

DIRECTLY TO BIAS THE 350

Ω 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 LT1007 CAN AMPLIFY THE

REDUCED SIGNAL ACCURATELY.

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LT1028

Ultralow Noise Precision Op Amp

Lowest Noise 0.85mV/

√Hz

LT1115

Ultralow Noise, Low distortion Audio Op Amp

0.002% THD, Max Noise 1.2mV/

√Hz

LT1124/LT1125

Dual/Quad Low Noise, High Speed Precision Op Amps

Similar to LT1007

LT1126/LT1127

Dual/Quad Decompensated Low Noise, High Speed Precision Op Amps

Similar to LT1037

LT1498/LT1499

10MHz, 5V/

µs, Dual/Quad Rail-to-Rail Input and Output

Precision C-Load

C-Load is a trademark of Linear Technology Corporation.