1
DATASHEET
Dual Supply/Low Power/1024-Tap/SPI Bus, Single
Digitally-Controlled (XDCP™) Potentiometer
X9110
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 nonvolatile 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.
Related Literature
• For a full list of related documents, visit our website
- X9110
product page
Features
• 1024 resistor taps – 10-bit resolution
• SPI serial interface for write, read, and transfer operations of
the potentiometer
• Wiper resistance, 40Ωtypical at 5V
• Four nonvolatile data registers
• Nonvolatile storage of multiple wiper positions
• Power-on recall, loads saved wiper position on power-up
• Standby current <5µA maximum
•System V
CC
: 2.7V to 5.5V operation
• Analog V+/V-: -5V to +5V
• 100kΩend-to-end resistance
• 100 year 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 (RoHS compliant)
FIGURE 1. FUNCTIONAL DIAGRAM
R
H
R
L
BUS
R
W
INTERFACE
CONTROL
POT
V
CC
V
SS
SPI
BUS
ADDRESS
DATA
STATUS
WRITE
READ
WIPER
1024-TAPS
TRANSFER
NC NC
100kΩ
POWER-ON RECALL
WIPER COUNTER
REGISTER (WCR)
DATA REGISTERS
(DR0-DR3)
CONTROL
INTERFACE
V+
V-
AND
October 28, 2016
FN8158.5
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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