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X9420WPI Datasheet

  • X9420WPI

  • Single Digitally Controlled (XDCP) Potentiometer

  • 20頁(yè)

  • INTERSIL   INTERSIL

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廬
X9420
Low Noise/Low Power/SPI Bus
Data Sheet
March 7, 2005
FN8195.0
Single Digitally Controlled (XDCP鈩?
Potentiometer
FEATURES
鈥?Solid-State Potentiometer
鈥?SPI serial interface
鈥?Register oriented format
鈥擠irect read/write/transfer wiper positions
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(chǔ)
鈥?High reliability
鈥擡ndurance鈥?00,000 data changes per bit per
register
鈥擱egister data retention鈥?00 years
鈥?8-bytes of nonvolatile EEPROM memory
鈥?10k鈩?or 2.5k鈩?resistor arrays
鈥?Resolution: 64 taps each pot
鈥?14-lead TSSOP, 16-lead SOIC, and 16-pin plastic
DIP packages
BLOCK DIAGRAM
HOLD
CS
SCK
S0
SI
A0
DESCRIPTION
The X9420 integrates a single 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 SPI bus
interface. The 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.
Interface
and
Control
Circuitry
R0 R1
8
Data
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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