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X9279

更新时间： 2024-11-10 22:35:03
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XICOR /
页数 文件大小 规格书
24页 398K
描述
Single Digitally-Controlled (XDCP) Potentiometer

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X9279 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 / 2-Wire Bus  
X9279  
Single Digitally-Controlled (XDCPTM) Potentiometer  
FEATURES  
DESCRIPTION  
• 256 Resistor Taps  
The X9279 integrates a single digitally controlled  
• 2-Wire Serial Interface for write, read, and  
transfer operations of the potentiometer  
• Wiper Resistance, 100Ω typical @ 5V  
• 16 Nonvolatile Data Registers for Each  
Potentiometer  
• Nonvolatile Storage of Multiple Wiper Positions  
• Power On Recall. Loads SavedWiper Position on  
Power Up.  
potentiometer (XDCP) on  
integrated circuit.  
a
monolithic CMOS  
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 2-Wire  
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.  
• Standby Current < 5µA Max  
• V : 2.7V to 5.5V Operation  
CC  
• 50KΩ, 100KΩ versions of End to End Resistance  
• Endurance: 100,000 Data Changes per Bit per  
Register  
• 100 yr. Data Retention  
• 14-Lead TSSOP, 16-Lead CSP (Chip Scale  
Package)  
The XDCP can be used as  
a three-terminal  
• Low Power CMOS  
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  
50KΩ and 100KΩ  
Power On Recall  
Data  
Inc/Dec  
256-taps  
wiper  
Status  
Bus  
Wiper Counter  
Register (WCR)  
2-Wire  
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 24  
REV 1.1.7 2/6/03  
www.xicor.com  
1234567...24

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