1

®

FN8193.1

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

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

XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved

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

X9410

Low Noise/Low Power/SPI Bus

Dual Digitally Controlled Potentiometer

(XDCP™)

FEATURES

• Two potentiometers per package

• SPI serial interface

• Register oriented format

- Direct read/write/transfer wiper positions

- Store as many as four positions per

potentiometer

• Power supplies

- V+ = 2.7V to 5.5V

- V- = -2.7V to -5.5V

• Low power CMOS

- Standby current < 1µA

- High reliability

- Endurance - 100,000 data changes per bit per

register

- Register data retention - 100 years

• 8-bytes of nonvolatile EEPROM memory

•10k

Ω resistor arrays

• Resolution: 64 taps each pot

• 24 Ld SOIC, 24 Ld TSSOP, and 24 Ld plastic DIP

packages

• Pb-free plus anneal available (RoHS compliant)

DESCRIPTION

The

X9410

integrates

two

digitally

controlled

potentiometers (XDCPs) on a monolithic CMOS

integrated circuit.

The digitally controlled potentiometer is implemented

using 63 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

serial

bus

interface.

Each

potentiometer

has

associated with it a volatile Wiper Counter Register

(WCR) and four nonvolatile Data Registers (DR0:DR3)

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 through the switches.

Power-up recalls the contents of 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.

BLOCK DIAGRAM

R0 R1

R2 R3

Wiper

Counter

Register

(WCR)

Resistor

Array

Pot1

R0 R1

R2 R3

Wiper

Counter

Register

(WCR)

Interface

and

Control

Circuitry

CS

SCK

A0

A1

Data

8

SO

SI

HOLD

WP

Pot 0

V+

V-

Pot 1

Data Sheet

September 19, 2005