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X9408WV24-2.7T5

更新时间： 2024-11-14 05:07:31
品牌 Logo 应用领域
XICOR 光电二极管
页数 文件大小 规格书
22页 550K
描述
Digital Potentiometer, 4 Func, 10000ohm, 2-wire Serial Control Interface, 64 Positions, CMOS, PDSO24, PLASTIC, TSSOP-24

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X9408WV24-2.7T5 数据手册

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APPLICATION NOTES  
A V A I L A B L E  
AN99 • AN115 • AN124 • AN133 • AN134 • AN135  
Low Noise/Low Power/2-Wire Bus  
X9408  
Quad Digitally Controlled (XDCP™) Potentiometers  
FEATURES  
DESCRIPTION  
• Four potentiometers in one package  
• 64 resistor taps per potentiometer  
• 2-wire serial interface  
The X9408 integrates four digitally controlled  
potentiometers (XDCP) on a monolithic CMOS  
integrated circuit.  
• Wiper resistance, 40Ω typical at 5V  
• Four nonvolatile data registers for each pot  
• Nonvolatile storage of wiper position  
• Standby current < 1µA max (total package)  
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 2-wire  
bus interface. Each potentiometer has associated with  
it a volatile Wiper Counter Register (WCR) and 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.  
• V  
= 2.7V to 5.5V operation  
CC  
V+ = 2.7V to 5.5V  
V– = –2.7V to –5.5V  
• 10KΩ, 2.5KΩ end to end resistances  
• High reliability  
—Endurance–100,000 data changes per bit per  
register  
—Register data retention–100 years  
• 24-lead SOIC, 24-lead TSSOP, and 24-lead CSP  
(Chip Scale Package) packages  
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  
V
V
V+  
V-  
Pot 0  
CC  
SS  
R0 R1  
R2 R3  
V
/R  
R0 R1  
R2 R3  
H0 H0  
Wiper  
Counter  
Register  
(WCR)  
Wiper  
Counter  
Register  
(WCR)  
V
/R  
H2 H2  
Resistor  
Array  
Pot 2  
V
/R  
L0 L0  
WP  
V
/R  
L2 L2  
V
/R  
SCL  
SDA  
A0  
A1  
A2  
W0 W0  
V
/R  
W2 W2  
Interface  
and  
Control  
8
Circuitry  
V
/R  
A3  
W1 W1  
Data  
V
V
/R  
W3 W3  
R0 R1  
R2 R3  
R0 R1  
R2 R3  
V
/R  
Wiper  
Counter  
Register  
(WCR)  
H1 H1  
/R  
Resistor  
Array  
Pot 1  
Wiper  
Counter  
Register  
(WCR)  
H3 H3  
Resistor  
Array  
Pot 3  
V
/R  
L1 L1  
V
/R  
L3 L3  
Characteristics subject to change without notice. 1 of 22  
REV 1.2.10 3/31/04  
www.xicor.com  
1234567...22

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