X9410 datasheet(1/21 Pages) XICOR

Il numero della parte	X9410

Spiegazioni elettronici	Dual Digitally Controlled Potentiometer

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Produttore elettronici	XICOR [Xicor Inc.]

Homepage	http://www.xicor.com

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REV 1.1 10/6/00

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Low Noise/Low Power/SPI Bus

X9410

Dual Digitally Controlled Potentiometer (XDCP™)

FEATURES

• Two potentiometers in one package

• SPI serial interface

• Register oriented format

—Direct read/write/transfer wiper positions

—Store as many as four positions per

potentiometer

• Power supplies

—VCC = 2.7V to 5.5V

—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-lead TSSOP, 24-lead SOIC and 24-pin plastic

DIP packages

DESCRIPTION

The

X9410

integrates

two

digitally

controlled

potentiometers

(XDCP)

on

a

monolithic

CMOS

integrated microcircuit.

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 bus

interface. Each potentiometer has associated with it a

volatile Wiper

Counter

Register

(WCR)

and

4

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

VH1/RH1

VL1/RL1

R0 R1

R2 R3

Wiper

Counter

Register

(WCR)

Interface

and

Control

Circuitry

CS

SCK

A0

A1

VH0/RH0

VL0/RL0

Data

8

VW0/RW0

VW1/RW1

SO

SI

HOLD

WP

Pot 0

VCC

VSS

V+

V-

Pot 1

APPLICATION NOTES

AVAILABLE

AN99 • AN115 • AN120 • AN124 • AN133 • AN134 • AN135

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