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X9408WP24I-2.7 PDF预览

X9408WP24I-2.7

更新时间： 2024-11-12 22:25:15
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英特矽尔 - INTERSIL /
页数 文件大小 规格书
21页 372K
描述
Low Noise/Low Power/2-Wire Bus

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X9408WP24I-2.7 数据手册

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X9408  
®
Low Noise/Low Power/2-Wire Bus  
Data Sheet  
September 19, 2005  
FN8191.2  
DESCRIPTION  
Quad Digitally Controlled (XDCP™)  
Potentiometers  
The X9408 integrates four digitally controlled  
potentiometers (XDCP) on a monolithic CMOS  
integrated circuit.  
FEATURES  
• Four potentiometers in one package  
• 64 resistor taps per potentiometer  
• 2-wire serial interface  
• 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  
The XDCP can be used as  
a three-terminal  
—Register data retention–100 years  
• 24 Ld SOIC, 24 Ld TSSOP, 24 Ld PDIP packages  
• Pb-free plus anneal available (RoHS compliant)  
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  
W0 W0  
V
/R  
W2 W2  
Interface  
and  
Control  
A1  
8
Circuitry  
A2  
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  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved  
All other trademarks mentioned are the property of their respective owners.  
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