1

®

FN8162.4

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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X9119

Single Supply/Low Power/1024-Tap/2-Wire Bus

Single Digitally-Controlled (XDCP™)

Potentiometer

The X9119 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 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. Powerup 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.

Features

• 1024 Resistor Taps – 10-Bit Resolution

• 2-Wire Serial Interface for Write, Read, and

Transfer Operations of the Potentiometer

• Wiper Resistance, 40

Ω Typical @ V

• Four Non-Volatile Data Registers

• Non-Volatile Storage of Multiple Wiper Positions

• Power-on Recall. Loads Saved Wiper Position on

Power-up.

• Standby Current < 3µA Max

•100k

Ω 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)

Functional Diagram

BUS

INTERFACE

CONTROL

POT

2-WIRE

BUS

ADDRESS

DATA

STATUS

WRITE

READ

WIPER

1024-TAPS

TRANSFER

NC

NC

100k

Ω

POWER-ON RECALL

WIPER COUNTER

REGISTER (WCR)

DATA REGISTERS

(DR0-DR3)

CONTROL

INTERFACE

AND

Data Sheet

July 9, 2008