DATASHEET
1024 Tap, Low Power, 2-Wire Interface, Digitally
Controlled (XDCP™) Potentiometer
X9119
Features
The X9119 integrates a single digitally controlled
potentiometer (XDCP™) on a monolithic CMOS integrated
circuit.
• 1024 resistor taps – 10-bit resolution
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 2-wire 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
through the switches. Power-up recalls the contents of the
default data register (DR0) to the WCR.
• Wiper resistance, 40Ω typical at VCC = 5V
• 2-Wire serial interface for write, read, and
transfer operations of the potentiometer
The XDCP™ can be used as a 3-terminal potentiometer or as a
2-terminal variable resistor in a wide variety of applications
including control, parameter adjustments and signal
processing.
• Four nonvolatile data registers
• Nonvolatile storage of multiple wiper positions
• Power-on recall, loads saved wiper position on power-up.
• Standby current <3µA maximum
• VCC: 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 X9118
• Pb-free available (RoHS compliant)
VCC
2-WIRE
BUS
INTERFACE
ADDRESS
DATA
STATUS
RH
BUS
INTERFACE
AND
CONTROL
WRITE
READ
TRANSFER
CONTROL
VSS
NC
POWER-ON RECALL
100kΩ
1024-TAPS
POT
WIPER COUNTER
REGISTER (WCR)
DATA REGISTERS
(DR0-DR3)
NC
WIPER
RW
RL
FIGURE 1. FUNCTIONAL DIAGRAM
July 5, 2016
FN8162.5
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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