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Fabricante

X9319

Digitally Controlled Potentiometer (XDCP™)

Xicor -> Intersil 

Digitally Controlled Potentiometer (XDCP™)

X9319

FEATURES

• Solid-state potentiometer

• 3-wire serial interface

• Terminal voltage, 0 to +10V

• 100 wiper tap points

—Wiper position stored in nonvolatile memory

and recalled on power-up

• 99 resistive elements

—Temperature compensated

—End to end resistance range ± 20%

• Low power CMOS

—VCC = 5V

—Active current, 3mA max.

—Standby current, 1mA max.

• High reliability

—Endurance, 100,000 data changes per bit

—Register data retention, 100 years

• RTOTAL value = 10KΩ and 50KΩ

• Packages

—8-lead SOIC and DIP

APPLICATIONS

• LCD bias control

• DC bias adjustment

• Gain and offset trim

• Laser diode bias control

• Voltage regulator output control

DESCRIPTION

The Xicor X9319 is a digitally controlled potentiometer

(XDCP). The device consists of a resistor array, wiper

switches, a control section, and nonvolatile memory.

The wiper position is controlled by a 3-wire interface.

The potentiometer is implemented by a resistor array

composed of 99 resistive elements and a wiper switch-

ing network. Between each element and at either end

are tap points accessible to the wiper terminal. The

position of the wiper element is controlled by the CS,

U/D, and INC inputs. The position of the wiper can be

stored in nonvolatile memory and then be recalled

upon a subsequent power-up operation.

The device can be used as a three-terminal

potentiometer for voltage control or as a two-terminal

variable resistor for current control in a wide variety of

applications.

BLOCK DIAGRAM

VCC (Supply Voltage)

Up/Down

(U/D)

Increment

(INC)

Device Select

(CS)

Control

and

Memory

VSS (Ground)

General

XDCP is a trademark of Xicor, Inc.

REV 1.7 7/10/03

U/D

INC

CS

RH

RW

RL

VVCSSC

Up/Down

Counter

7-Bit

Nonvolatile

Memory

Store and

Recall

Control

Circuitry

99

RH

98

97

One 96

of

One

Hundred

Decoder

2

Wiper

Switches

Resistor

Array

1

0

RL

RW

Detailed

www.xicor.com

1 of 10

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