X9420YSM-2.7 Datasheet

IC型號(hào)：
X9420YSM-2.7
PDF描述：
Single Digitally Controlled (XDCP) Potentiometer
文件大小：
114.77KB
PDF頁(yè)數(shù)：
20頁(yè)
芯片廠家：
XICOR

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PPLICATION

OTES

A V A I L A B L E

AN99 鈥?AN115 鈥?AN120 鈥?AN124 鈥?AN133 鈥?AN134 鈥?AN135

Low Noise/Low Power/SPI Bus

X9420

Single Digitally Controlled (XDCP) Potentiometer

FEATURES

鈥?Solid-State Potentiometer

鈥?SPI serial interface

鈥?Register oriented format

鈥擠irect read/write/transfer wiper positions

鈥擲tore as many as four positions per

potentiometer

鈥?Power supplies

鈥擵

= 2.7V to 5.5V

鈥擵+ = 2.7V to 5.5V

鈥擵鈥?= 鈥?.7V to 鈥?.5V

鈥?Low power CMOS

鈥擲tandby current < 1碌A(chǔ)

鈥?High reliability

鈥擡ndurance鈥?00,000 data changes per bit per

鈥擱egister data retention鈥?00 years

鈥?8-bytes of nonvolatile EEPROM memory

鈥?10K

鈩?/div>

or 2.5K

鈩?/div>

resistor arrays

鈥?Resolution: 64 taps each pot

鈥?14-lead TSSOP, 16-lead SOIC, and 16-pin plastic

DIP packages

DESCRIPTION

The X9420 integrates a single 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. The 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

HOLD

SCK

Interface

and

Control

Circuitry

R0 R1

Data

R2 R3

Wiper

Counter

(WCR)

REV 1.1.6 7/30/02

www.xicor.com

Characteristics subject to change without notice.

1 of 20

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X9420YSM-2.7 Datasheet

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