X9015US XICOR [Xicor Inc.], X9015US Datasheet - Page 9

• Manufacturer Part Number: X9015US
• Description: Digitally-Controlled Potentiometer
• Manufacturer: XICOR [Xicor Inc.]

X9015
APPLICATIONS INFORMATION
Electronic digitally-controlled (XDCP) potentiometers provide two powerful application advantages; (1) the variability and
reliability of a solid-state potentiometer, and (2) the flexibility of computer-based digital controls.
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
R
V
2
Three terminal potentiometer;
W
variable voltage divider
2
V
/R
OUT
R
1
+
–
)+I
1
V
V
+5V
–5V
= V
adj
H
L
V
OP-07
R
R
W
2
V
O
V
(REG)
OUT
V
W
+12V
V
Offset Voltage Adjustment
Cascading Techniques
+V
+V
10K
S
10K
(a)
100K
-12V
R
1
9
V
10K
W
–
+
+V
TL072
R
(b)
2
X
Two terminal variable resistor;
V
W
variable current
V
O
V
V
Comparator with Hysterisis
R
S
V
S
Noninverting Amplifier
V
V
(for additional circuits see AN115)
I
UL
LT311A
LL
R
V
= {R
= {R
O
1
= (1+R
R
1
1
1
+
–
/(R
/(R
R
+5V
–5V
–
+
2
1
1
+R
+R
2
/R
LM308A
2
2
1
)} V
)} V
)V
R
S
O
O
2
(max)
(min)
V
O
V
O