®
X9110
Dual Supply/Low Power/1024-Tap/SPI Bus
Data Sheet
October 7, 2005
FN8158.2
Single Digitally-Controlled (XDCP™)
Potentiometer
The X9110 integrates a single digitally controlled
potentiometer (XDCP) on a monolithic CMOS integrated
circuit.
The digital controlled potentiometer is implemented using
1023 resistive elements in a series array. Between each
element are tap points connected to the wiper terminal
through switches. The position of the wiper on the array is
controlled by the user through the SPI bus interface. The
potentiometer has associated with it a volatile Wiper Counter
Register (WCR) and four non-volatile Data Registers that
can be directly written to and read by the user. The contents
of the WCR controls the position of the wiper on the resistor
array though the switches. Power-up recalls the contents of
the default data register (DR0) to the WCR.
The XDCP can be used as a three-terminal potentiometer or
as a two terminal variable resistor in a wide variety of
applications including control, parameter adjustments, and
signal processing.
Features
• 1024 Resistor Taps – 10-Bit Resolution
• SPI Serial Interface for write, read, and transfer operations
of the potentiometer
• Wiper Resistance, 40Ω Typical @ 5V
• Four Non-Volatile Data Registers
• Non-Volatile Storage of Multiple Wiper Positions
• Power-on Recall. Loads Saved Wiper Position on Power-up
• Standby Current < 3µA Max
• System V
CC
: 2.7V to 5.5V Operation
• Analog V+/V-: -5V to +5V
• 100kΩ End to End Resistance
• 100 yr. Data Retention
• Endurance: 100, 000 Data Changes Per Bit Per Register
• 14 Ld TSSOP
• Dual Supply Version of the X9111
• Low Power CMOS
• Pb-Free Plus Anneal Available (RoHS Compliant)
Pinout
X9110
14 LD TSSOP
TOP VIEW
V+
S0
A0
SCK
WP
SI
VSS
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
R
L
R
H
R
W
HOLD
CS
V-
Functional Diagram
V
CC
R
H
V+
ADDRESS
DATA
STATUS
SPI
BUS
INTERFACE
BUS
INTERFACE &
CONTROL
WRITE
READ
TRANSFER
POWER-ON RECALL
WIPER COUNTER
REGISTER (WCR)
DATA REGISTERS
(DR0-DR3)
WIPER
100kΩ
1024-TAPS
POT
CONTROL
V
SS
NC
NC
R
W
R
L
V-
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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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.
INTERSIL [ INTERSIL CORPORATION ]
