X9317 INTERSIL [Intersil Corporation], X9317 Datasheet - Page 11

• Manufacturer Part Number: X9317
• Description: Low Noise, Low Power, 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
Basic Configurations of Electronic Potentiometers
Basic Circuits
V
+V
IN
V
O
Buffered Reference Voltage
(REG) = 1.25V (1+R
R
V
Voltage Regulator
REF
1
I
adj
317
Three terminal potentiometer;
variable voltage divider
R
R
2
W
2
V
/R
11
V
OUT
REF
R
1
+
-
1
)+I
+5V
= V
adj
W
LMC7101
R
R
/R
R
H
2
L
W
V
O
V
(REG)
OUT
R
W
+5V
V
Offset Voltage Adjustment
Cascading Techniques
S
10kΩ
+V
+V
10kΩ
(a)
100kΩ
X9317
R
1
R
10kΩ
W
computer-based digital controls, and (3) the retentivity of
nonvolatile memory used for the storage of multiple
potentiometer settings or data.
LMC7101
-
+
+V
+5V
R
(b)
2
X
Two terminal variable resistor;
variable current
R
W
V
O
V
V
V
V
Single Supply Inverting Amplifier
S
+5V
V
UL
LL
Comparator with Hysteresis
REF
S
= {R
= {R
100K
I
(for additional circuits see AN115)
LT311A
R
1
1
1
R
/(R
/(R
1
1
1
+R
R
+R
2
R
2
2
100K
2
-
+
)} V
)} V
V
O
O
O
-
+
= (R2/R1)V
(min)
(max)
+5V
LMC7101
September 9, 2005
S
FN8183.1
V
V
O
O