+15V
2
+10V Out
–10V Out
BUF634 inside feedback
loop contributes no error.
6
INA133
2
3
5
6
REF102
–In
+In
INA133
2
5
6
BUF634
VO
4
1
3
RL
1
FIGURE 23. ±10V Precision Voltage Reference.
FIGURE 24. High Output Current Precision Difference
Amplifier.
V+
12.5kΩ
50kΩ
1kΩ
0V to 10V
In
7
INA133
2
5
OPA227
+15V
V2
2
25kΩ
25kΩ
25kΩ
R1
50.1Ω
6
2N3904
Set R1 = R2
R2
6
10V
REF102
For 4-20mA applications,
the REF102 sets the 4mA
low-scale output for 0V input.
25kΩ
50.1Ω
3
1
V3
4
RLOAD
4
IO = 4 to 20mA
1
1
IO = V3 – V2
+
25kΩ R2
FIGURE 25. Precision Voltage-to-Current Conversion.
®
15
INA133, INA2133