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X9271

更新时间: 2024-11-05 22:35:03
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XICOR /
页数 文件大小 规格书
23页 403K
描述
Single Digitally-Controlled (XDCP) Potentiometer

X9271 数据手册

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APPLICATION NOTES AND DEVELOPMENT SYSTEM  
A V A I L A B L E  
AN99 • AN115 • AN124 •AN133 • AN134 • AN135  
Single Supply / Low Power / 256-tap / SPI bus  
X9271  
Single Digitally-Controlled (XDCPTM) Potentiometer  
FEATURES  
DESCRIPTION  
• 256 Resistor Taps  
The X9271 integrates a single digitally controlled  
• SPI Serial Interface for write, read, and transfer  
operations of the potentiometer  
potentiometer (XDCP) on  
integrated circuit.  
a
monolithic CMOS  
• Wiper Resistance, 100typical @ V  
= 5V  
CC  
The digital controlled potentiometer is implemented  
using 255 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  
nonvolatile 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.  
• 16 Nonvolatile Data Registers  
• Nonvolatile Storage of Multiple Wiper Positions  
• Power On Recall. Loads SavedWiper Position on  
Power Up.  
• Standby Current < 3µA Max  
• V : 2.7V to 5.5V Operation  
CC  
• 50K, 100Kversions of End to End Resistance  
• 100 yr. Data Retention  
• Endurance: 100,000 Data Changes per Bit per  
Register  
• 14-Lead TSSOP, 16-Lead CSP (Chip Scale  
Package)  
• Low Power CMOS  
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.  
FUNCTIONAL DIAGRAM  
V
R
H
CC  
Write  
Read  
Address  
Transfer  
50Kand 100KΩ  
Power On Recall  
Data  
256-taps  
Inc/Dec  
Status  
Wiper Counter  
Register (WCR)  
Bus  
SPI  
Bus  
Interface  
POT  
Interface  
and Control  
Data Registers  
16 Bytes  
Control  
R
V
R
W
SS  
L
Characteristics subject to change without notice. 1 of 23  
REV 1.1.7 2/6/03  
www.xicor.com  

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