X9315
®
Low Noise, Low Power, 32 Taps
Data Sheet
September 15, 2005
FN8179.1
Digitally Controlled Potentiometer
(XDCP™)
The Intersil X9315 is a digitally controlled potentiometer
(XDCP). The device consists of a resistor array, wiper
switches, a control section, and nonvolatile memory. The
wiper position is controlled by a 3-wire interface.
Features
• Solid-state potentiometer
• 3-wire serial interface
• 32 wiper tap points
- Wiper position stored in nonvolatile memory and
recalled on power-up
The potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper switching
network. Between each element and at either end are tap
points accessible to the wiper terminal. The position of the
wiper element is controlled by the CS, U/D, and INC inputs.
The position of the wiper can be stored in nonvolatile
memory and then be recalled upon a subsequent power-up
operation.
• 31 resistive elements
- Temperature compensated
- End to end resistance range ± 20%
- Terminal voltage, 0 to V
CC
• Low power CMOS
- V
CC
= 2.7V or 5V
- Active current, 50/400µA max.
- Standby current, 1µA max.
The device can be used as a three-terminal potentiometer or
as a two-terminal variable resistor in a wide variety of
applications including:
• High reliability
- Endurance, 100,000 data changes per bit
- Register data retention, 100 years
• Control
• Parameter Adjustments
• Signal Processing
• R
TOTAL
values = 10kΩ, 50kΩ, 100kΩ
• Packages
- 8 Ld SOIC, MSOP and PDIP
• Pb-free plus anneal available (RoHS compliant)
Block Diagram
U/D
INC
CS
5-Bit
R /V
31
H
H
Up/Down
Counter
V
(Supply Voltage)
CC
30
29
28
R /V
H
H
Up/Down
(U/D)
5-Bit
Nonvolatile
Memory
Control
and
Memory
Increment
(INC)
One
of
R
/V
W
W
Transfer
Gates
Resistor
Array
Thirty
Two
Decoder
Device Select
(CS)
R /V
L
L
2
Store and
Recall
Control
Circuitry
V
(Ground)
SS
1
0
V
V
CC
SS
General
R /V
L
L
/V
R
W
W
Detailed
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1