X9260
®
Dual Supply/Low Power/256-Tap/SPI bus
Data Sheet
February 28, 2005
FN8170.0
DESCRIPTION
Dual Digitally-Controlled (XDCP™)
Potentiometers
The X9260 integrates
potentiometer (XDCP) on
integrated circuit.
2
digitally controlled
monolithic CMOS
a
FEATURES
• Dual–Two Separate Potentiometers
• 256 resistor taps/pot–0.4% resolution
• SPI Serial Interface for write, read, and transfer
operations of the potentiometer
• Wiper Resistance, 100Ω typical @ V+ = 5V,
V- = -5V
• 4 Nonvolatile Data Registers for Each
Potentiometer
• Nonvolatile Storage of Multiple Wiper Positions
• Power-on Recall. Loads Saved Wiper Position
on Power-up.
The digitally controlled potentiometer is implemented
using 255 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. Each potentiometer has associated
with it a volatile Wiper Counter Register (WCR) and a
four nononvolatile 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.
• Standby Current < 5µA Max
• V : 2.7V to 5.5V Operation
CC
• 50kΩ, 100kΩ versions of End to End Resistance
• 100 yr. Data Retention
The XDCP can be used as
a three-terminal
• Endurance: 100,000 Data Changes per Bit per
Register
• 24-Lead SOIC, 24-Lead XBGA
• Low Power CMOS
potentiometer or as a two terminal variable resistor in
a wide variety of applications including control,
parameter adjustments, and signal processing.
• Power Supply V
= 2.7V to 5.5V
CC
V+ = 2.7V to 5.5V
V- = -2.7V to -5.5V
FUNCTIONAL DIAGRAM
V
V
+
R
R
H1
CC
H0
Write
Read
Address
Data
Status
Transfer
Inc/Dec
Power-on Recall
Bus
SPI
Bus
Interface
Wiper Counter
Interface
and Control
Registers (WCR)
Data Registers
(DR0-DR3)
Control
V
V-
R
R
R
R
L1
SS
W0
L0
W1
50kΩ or 100kΩ versions
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | 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.
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