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| X9116 Datasheet, PDF (7/9 Pages) Xicor Inc. – Digitally Controlled Potentiometer (XDCP) | |||
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X9116
Basic Configurations of Electronic Potentiometers
VR
VH
VW/RW
VL
Three terminal potentiometer;
variable voltage divider
Basic Circuits
VR
I
Two terminal variable resistor;
variable current
Buffered Reference Voltage
R1
+V
+5V
VREF
VW
OP-07
+
VOUT
â
â5V
VOUT = VW/RW
Cascading Techniques
+V
+V
X
VW/RW
+V
VW
(a)
(b)
Noninverting Amplifier
+5V
VS
+
LM308A
VO
â
-5V
R2
R1
VO = (1+R2/R1)VS
Voltage Regulator
VIN
317
VO (REG)
R1
Iadj
R2
VO (REG) = 1.25V (1+R2/R1)+Iadj R2
Comparator with Hysteresis
VS LT311A â
VO
+
R1
R2
VUL = {R1/(R1+R2)} VO(max)
VLL = {R1/(R1+R2)} VO(min)
(for additional circuits see AN115)
7
FN8160.1
September 12, 2005
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