The X9118 is 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 2-wire 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 resistors in a wide variety of

applications including control, parameter adjustments, and

signal processing.

Features

• 1024 resistor taps – 10-bit resolution

• 2-wire serial interface for write, read and transfer

operations of the potentiometer

• Wiper resistance, 40Ω typical @ 5V

• Four non-volatile data registers for each potentiometer

• Non-volatile storage of multiple wiper positions

• Power on recall: Loads saved wiper position on power-up

• Standby current < 15µA Max

• System VCC: 2.7V to 5.5V operation

• Analog V+/V-: -5V to +5V

• 100kΩ end-to-end resistance

• Endurance: 100,000 data changes per bit per register

• 100 years data retention

• 14 Ld TSSOP

• Low power CMOS

• Pb-free (RoHS compliant)