1

®

FN8159.4

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

1-888-INTERSIL or 1-888-468-3774

Copyright Intersil Americas Inc. 2005, 2006. All Rights Reserved

XDCP is a trademark of Intersil Americas Inc. All other trademarks mentioned are the property of their respective owners.

X9111

Single Supply/Low Power/1024-Tap/SPI Bus

Single Digitally-Controlled (XDCP™)

Potentiometer

The X9111 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 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

• SPI Serial Interface for Write, Read, And Transfer

Operations Of The Potentiometer

• Wiper Resistance, 40

Ω Typical @ 5V

• 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 X9110

• Pb-Free Plus Anneal Available (RoHS Compliant)

Pinout

Functional Diagram

1

2

3

4

5

6

7

8

14

13

12

11

10

9

NC

CS

A1

TSSOP

A0

SO

SI

HOLD

SCK

WP

X9111

Bus

Interface &

Control

POT

SPI

Bus

Address

Data

Status

Write

Read

Wiper

1024-taps

Transfer

NC

100k

Ω

Power On Recall

Wiper Counter

Register (WCR)

Data Registers

(DR0-DR3)

Control

Interface

Data Sheet

September 15, 2006