®
X9111
Single Supply/Low Power/1024-Tap/SPI Bus
Data Sheet
September 15, 2006
FN8159.4
Single Digitally-Controlled (XDCP™)
Potentiometer
The X9111 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. Powerup 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
• V
CC
: 2.7V to 5.5V Operation
• 100kΩ End to End Resistance
• 100 yr. Data Retention
• Endurance: 100,000 Data Changes Per Bit Per Register
• 14 Ld TSSOP
• Low Power CMOS
• Single Supply Version of the X9110
• Pb-Free Plus Anneal Available (RoHS Compliant)
Pinout
TSSOP
SO
A0
NC
CS
SCK
SI
V
SS
1
2
3
4
5
6
7
X9111
14
13
12
11
10
9
8
V
CC
R
L
R
H
R
W
HOLD
A1
WP
Functional Diagram
V
CC
R
H
SPI
Bus
Interface
Address
Data
Status
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
R
W
R
L
1
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.
Copyright Intersil Americas Inc. 2005, 2006. All Rights Reserved
XDCP is a trademark of Intersil Americas Inc. All other trademarks mentioned are the property of their respective owners.
INTERSIL [ INTERSIL CORPORATION ]
