X9455_06 INTERSIL [Intersil Corporation], X9455_06 Datasheet

X9455_06

Manufacturer Part Number

X9455_06

Description

Dual Two-wiper Digitally-Controlled Potentiometer

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.X9455_06.pdf (19 pages)

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Dual Two-wiper Digitally-Controlled

(XDCP™) Potentiometer

The X9455 integrates 2 digitally controlled potentiometers

(XDCP), each one with dual wipers, on a monolithic CMOS

integrated circuit.

The digitally controlled potentiometer is implemented using

255 resistive elements in a series array. Between each

element are tap points connected to wiper terminals through

switches. The position of each wiper on the array is

controlled by the user through the U/D or 2-wire bus

interface. Each potentiometer wiper has associated with it

two volatile Wiper Counter Register (WCR) and each WCR

has associated with it 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. The contents of the default data

registers (DR0A0, DR0B0, DR1A0, DR1B0) are loaded into

the WCR on power up.

The DCP can be used as a four-terminal potentiometer in a

wide variety of applications including the programming of

bias voltages, window comparators, and three resistor

programmable networks.

Pinout

RW0B

RW0A

RH0

DS0

RL0

U/D

Vcc

(24 LD TSSOP)

TOP VIEW

X9455

Data Sheet

DS1

SCL

RL1

RH1

RW1A

Vss

RW1B

SDA

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

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

Features

• Dual two-wiper solid state potentiometer

• 256 resistor tap points-0.4% resolution

• 2-wire serial interface for write, read, and transfer

• Up/Down interface for individual potentiometer wipers

• Wiper resistance, 40Ω typical

• Non-volatile storage of wiper positions

• Power on recall loads saved wiper position on power-up.

• Standby current < 20µA Max

• Maximum wiper current: 3mA

• V

• 2.8kΩ,10kΩ, 50kΩ, 100kΩ version of total pot resistance

• Endurance: 100,000 data changes per bit per register

• 100 yr. data retention

• 24 Ld TSSOP

• Pb-free plus anneal available (RoHS compliant)

operations of the potentiometer

: 2.7V to 5.5V operation

All other trademarks mentioned are the property of their respective owners.

July 28, 2006

Intersil (and design) is a registered trademark of Intersil Americas Inc.

X9455

FN8202.1

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