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X9428YS-2.7 Datasheet

  • X9428YS-2.7

  • Single Digitally Controlled Potentiometer

  • 20頁

  • INTERSIL   INTERSIL

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廬
X9428
Low Noise/Low Power/2-Wire Bus
Data Sheet
March 8, 2005
FN8197.0
Single Digitally Controlled Potentiometer
(XDCP鈩?
FEATURES
鈥?Solid state potentiometer
鈥?2-wire serial interface
鈥?Register oriented format
鈥擠irect Read/Write/Transfer Wiper Position
鈥擲tore as many as Four Positions per
Potentiometer
鈥?Power supplies
鈥擵
CC
= 2.7V to 5.5V
鈥擵+ = 2.7V to 5.5V
鈥擵鈥?= -2.7V to -5.5V
鈥?Low power CMOS
鈥擲tandby current < 1碌A
鈥擨deal for Battery Operated Applications
鈥?High reliability
鈥擡ndurance鈥?00,000 Data Changes per Bit per
Register
鈥擱egister Data Retention鈥?00 years
鈥?4-bytes of nonvolatile memory
鈥?10k鈩?resistor array
鈥?Resolution: 64 taps each potentiometer
鈥?SOIC and TSSOP packages
BLOCK DIAGRAM
V
CC
V
SS
V+
V鈥?/div>
DESCRIPTION
The X9428 integrates a digitally controlled
potentiometers (XDCP) on a monolithic CMOS
integrated microcircuit.
The digitally 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 4
nonvolatile Data Registers (DR0:DR3) 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 through the switches. Power-up recalls
the contents of 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.
SCL
SDA
A0
A2
A3
Data
WP
Interface
and
Control
Circuitry
R0 R1
8
R2 R3
Wiper
Counter
Register
(WCR)
V
H
/R
H
V
L
/R
L
V
W
/R
W
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
|
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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