X9279
APPLICATIONS INFORMATION
Basic Configurations of Electronic Potentiometers
+V
R
V
R
RW
I
Three terminal Potentiometer;
Variable voltage divider
Two terminal Variable Resistor;
Variable current
Application Circuits
Noninverting Amplifier
Voltage Regulator
V
+
–
S
V
V
V (REG)
O
317
O
IN
R
1
R
2
I
adj
R
R
1
2
V
= (1+R /R )V
V
(REG) = 1.25V (1+R /R )+I
R
adj 2
O
2
1
S
O
2
1
Offset Voltage Adjustment
Comparator with Hysterisis
R
R
2
1
V
–
+
S
V
V
S
O
100KΩ
–
+
V
O
TL072
R
R
1
2
10KΩ
10KΩ
+12V
V
= {R /(R +R )} V (max)
1 1 2 O
UL
10KΩ
-12V
RL = {R /(R +R )} V (min)
L
1
1
2
O
Characteristics subject to change without notice. 20 of 24
REV 1.1.7 2/6/03
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XICOR [ XICOR INC. ]
