X9421YSI-2.7 Datasheet

IC型號：
X9421YSI-2.7
PDF描述：
Single Digitally Controlled (XDCP) Potentiometer
文件大?。?/label>
118.05KB
PDF頁數(shù)：
21頁
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

X9421

Single Digitally Controlled (XDCP) Potentiometer

FEATURES

鈥?Single Voltage Potentiometer

鈥?64 Resistor Taps

鈥?SPI Serial Interface for write, read, and transfer

operations of the potentiometer

鈥?/div>

Wiper Resistance, 150

鈩?/div>

Typical at 5V

鈥?4 Non-Volatile Data Registers

鈥?Non-Volatile Storage of Multiple Wiper Positions

鈥?Power On Recall. Loads Saved Wiper Position on

Power Up.

鈥?Standby Current < 5碌A(chǔ) Max

鈥?V

: 2.7V to 5.5V Operation

鈥?/div>

2.5K

鈩?/div>

, 10K

鈩?/div>

End to End Resistance

鈥?100 yr. Data Retention

鈥?Endurance: 100, 000 Data Changes per Bit per

鈥?14-Lead TSSOP, 16-Lead SOIC

鈥?Low Power CMOS

DESCRIPTION

The X9421 integrates a single digitally controlled

potentiometer (XDCP) on a monolithic CMOS

integrated circuit.

The digital 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 a 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. Powerup recalls the contents of

the default data register (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

address

data

status

SPI

bus

interface

write

read

transfer

inc / dec

Bus

Interface &

Control

Power On Recall

Wiper Counter

wiper

POT

10K鈩?/div>

64-taps

control

Data Registers

4 Bytes

REV 1.1.6 8/1/02

www.xicor.com

Characteristics subject to change without notice.

1 of 21

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