X9312WPI INTERSIL [Intersil Corporation], X9312WPI Datasheet - Page 7

• Manufacturer Part Number: X9312WPI
• Description: Terminal Voltage 0V to + 15V, 100 Taps
• Manufacturer: INTERSIL [Intersil Corporation]

APPLICATIONS INFORMATION
Electronic digitally controlled (XDCP) potentiometers provide three powerful application advantages; (1) the variability
and reliability of a solid-state potentiometer, (2) the flexibility of computer-based digital controls, and (3) the retentivity
of nonvolatile memory used for the storage of multiple potentiometer settings or data.
Basic Configurations of Electronic Potentiometers
Basic Circuits
V
+V
IN
V
O
(REG) = 1.25V (1+R
Buffered Reference Voltage
R
V
Voltage Regulator
REF
1
I
adj
317
Three terminal potentiometer;
variable voltage divider
R
V
2
W
2
/R
V
OUT
1
R
)+I
7
+
–
1
V
V
+5V
-5V
adj
= V
H
L
V
R
OP-07
W
R
2
/R
V
W
O
V
(REG)
OUT
V
W
/R
+12V
W
V
Offset Voltage Adjustment
Cascading Techniques
10kΩ
+V
+V
S
10kΩ
(a)
100kΩ
-12V
X9312
R
1
V
10kΩ
W
/R
W
–
+
+V
TL072
R
(b)
2
X
Two terminal variable resistor;
variable current
V
W
/R
W
V
O
V
V
V
V
UL
LL
Comparator with Hysteresis
R
S
V
= {R
= {R
S
Noninverting Amplifier
I
(for additional circuits see AN115)
V
LT311A
1
1
O
/(R
R
/(R
= (1+R
1
1
1
+R
R
+R
1
+
–
2
R
2
+5V
–5V
)} V
)} V
2
–
+
2
/R
O
1
O
)V
LM308A
(min)
(max)
S
R
2
March 15, 2005
V
O
V
FN8176.0
O