+VS
+5V
100µA
VO
1kΩ
The
Window
5V
1/2
LM393
0
V
I
–VW
VCENTER
–VW , +VW = 100µA • R
+VW
(2)
R(3)
0.01µF(1)
0.01µF(1)
(2)
VCENTER
VO
R(3)
1/2
LM393
VI
100µA
NOTES: (1) Capacitors optional to reduce noise and switching time.
(2) Programs center of threshold voltage. (3) Programs window voltage.
–VS
FIGURE 25. Window Comparator.
+VS
100µA
100µA
1/2
OPA1013
1/2
OPA1013
PMI
–In
+In
MAT03
–VS
INA105
VO = +In – (–In)
FIGURE 26. Instrumentation Amplifier with Compliance to –VS.
15
®
REF200