LT1007, LT1007A, LT1037, LT1037A
LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C – D3195, FEBRUARY 1989 – REVISED JANUARY 1993
APPLICATION INFORMATION
7.5 V
5 kΩ
3
7
+
2.5 V
6
LT1007
LT1009
2
4
–
–7.5 V
Reference Out
350 Ω
Bridge
15 V
7
3
+
6
30.1
kΩ
0 to 10 V
Output
LT1007
†
10 kΩ
Zero
Trim
2
–
4
†
1 µF
30.1 kΩ
–15 V
7.5 V
7
2
3
+
6
LT1007
†
499 Ω
50 kΩ
Gain
Trim
†
RN60C Film Resistors
–
4
–7.5 V
The LT1007 is capable of providing excitation current
directly to bias the 350-Ω bridge at 5 V. With only 5 V
across the bridge (as opposed to the usual 10 V) 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.
Figure 50. Strain Gauge Signal Conditioner With Bridge Excitation
23
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
