X9259 Xicor, X9259 Datasheet

X9259

Manufacturer Part Number

X9259

Description

Quad Digitally-Controlled (XDCP) Potentiometers

Manufacturer

Xicor

Datasheet

1.X9259.pdf (25 pages)

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Download datasheet (401Kb)

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

FEATURES

• Quad–Four 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

• V

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

• Endurance: 100,000 Data Changes per Bit per

• 100 yr. Data Retention

• Single Supply Version of X9258

• 24-Lead SOIC, 24-Lead TSSOP, 24-Lead XBGA

• Low Power CMOS

FUNCTIONAL DIAGRAM

REV 1.2.3 4/30/02

Interface

2-Wire

transfer operations of the potentiometer

Potentiometer

Power Up.

Resistance

Bus

AN99 • AN115 • AN124 •AN133 • AN134 • AN135

: 2.7V to 5.5V Operation

PPLICATION

Address

Status

Data

A V A I L A B L E

OTES AND

Quad Digitally-Controlled (XDCP

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

16 Bytes

X9259

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

bus interface. Each potentiometer has 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.

X9259

) Potentiometers

(XDCP)

integrates

Characteristics subject to change without notice.

50KΩ or 100KΩ versions

digitally

monolithic

controlled

CMOS

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