X9269 Xicor, X9269 Datasheet

X9269

Manufacturer Part Number

X9269

Description

Dual Digitally-Controlled Potentiometers

Manufacturer

Xicor

Datasheet

1.X9269.pdf (25 pages)

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Single Supply / Low Power / 256-tap / 2-Wire bus

FEATURES

• Dual–Two separate potentiometers

• 256 resistor taps/pot–0.4% resolution

• 2-Wire Serial Interface for write, read, and

• Wiper Resistance, 100 Ω typical V

• 4 Nonvolatile Data Registers for Each

• Nonvolatile Storage of Multiple Wiper Positions

• Power On Recall. Loads Saved Wiper Position on

• Standby Current < 5µA Max

• 50K Ω , 100K Ω versions of End to End Pot

• 100 yr. Data Retention

• Endurance: 100,000 Data Changes per Bit per

• 24-Lead SOIC, 16-Lead CSP (Chip Scale Pack-

• Low Power CMOS

• Power Supply V

FUNCTIONAL DIAGRAM

REV 1.1.11 2/17/03

Interface

2-Wire

transfer operations of the potentiometer single

supply device

Potentiometer

Power Up.

Resistance

age), 24-Lead TSSOP

Bus

AN99 • AN115 • AN124 •AN133 • AN134 • AN135

PPLICATION

Address

Status

Data

A V A I L A B L E

OTES AND

Dual Digitally-Controlled (XDCP

= 2.7V to 5.5V

and Control

Interface

EVELOPMENT

Bus

Transfer

YSTEM

Inc/Dec

Control

Write

Read

= 5V

Registers (WCR)

Power On Recall

Wiper Counter

Data Registers

www.xicor.com

(DR0–DR3)

X9269

DESCRIPTION

The

potentiometer

integrated circuit.

The digital controlled potentiometer is implemented

using 255 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

associated with it a volatile Wiper Counter Register

(WCR) and a 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. 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.

X9269

bus

) Potentiometers

interface. Each

(XDCP)

integrates

Characteristics subject to change without notice.

50KΩ or 100KΩ versions

digitally

potentiometer

monolithic

controlled

CMOS

1 of 25

has

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