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X9421WV14IZ Datasheet, PDF (1/20 Pages) Intersil Corporation – Single Voltage Potentiometer
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Single Digitally Controlled (XDCP™)
Potentiometer
Description
The X9421 integrates a single digitally controlled
potentiometer (XDCP) on a monolithic CMOS integrated
circuit.
The digital controlled potentiometer is implemented using 63
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 a 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.
Block Diagram
X9421
Low Noise/Low Power/SPI Bus
January 14, 2009
FN8196.4
Features
• Single Voltage Potentiometer
• 64 Resistor Taps
• SPI Serial Interface for Write, Read, and Transfer
Operations of the Potentiometer
• Wiper Resistance, 150Ω Typical at 5V
• 4 Non-Volatile Data Registers
• Non-Volatile Storage of Multiple Wiper Positions
• Power-on Recall. Loads Saved Wiper Position on
Power-up.
• Standby Current < 5µA Max
• VCC : 2.7V to 5.5V Operation
• 2.5kΩ, 10kΩ End to End Resistance
• 100 yr. Data Retention
• Endurance: 100, 000 Data Changes per Bit per Register
• 14 Ld TSSOP, 16 Ld SOIC
• Low Power CMOS
• Pb-Free Available (RoHS Compliant)
VCC
RH/VH
SPI
BUS
INTERFACE
ADDRESS
DATA
STATUS
WRITE
READ
TRANSFER
INC / DEC
BUS
INTERFACE &
CONTROL
CONTROL
POWER-ON RECALL
WIPER COUNTER
REGISTER (WCR)
DATA REGISTERS
4 BYTES
WIPER
10kΩ
64-TAPS
POT
VSS
RW/VW RL/VL
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.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005, 2008, 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.