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X9279UV14

Description
Single Digitally-Controlled (XDCP) Potentiometer
Categoryaccessories   
File Size400KB,24 Pages
ManufacturerXicon Passive Components
Websitehttp://www.xicor.com
Download Datasheet View All

X9279UV14 Overview

Single Digitally-Controlled (XDCP) Potentiometer

A
PPLICATION
N
OTES AND
D
EVELOPMENT
S
YSTEM
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 (XDCP
TM
) Potentiometer
FEATURES
• 256 Resistor Taps
• 2-Wire Serial Interface for write, read, and
transfer operations of the potentiometer
• Wiper Resistance, 100
typical @ 5V
• 16 Nonvolatile Data Registers for Each
Potentiometer
• Nonvolatile Storage of Multiple Wiper Positions
• Power On Recall. Loads Saved Wiper Position on
Power Up.
• Standby Current < 5µA Max
• V
CC
: 2.7V to 5.5V Operation
• 50K
, 100K
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)
• Low Power CMOS
DESCRIPTION
The X9279 integrates a single digitally controlled
potentiometer (XDCP) on a monolithic CMOS
integrated circuit.
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.
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.
FUNCTIONAL DIAGRAM
V
CC
R
H
2-Wire
Bus
Interface
Address
Data
Status
Write
Read
Transfer
Inc/Dec
Bus
Interface
and Control
Control
Power On Recall
Wiper Counter
Register (WCR)
Data Registers
16 Bytes
wiper
50KΩ and 100KΩ
256-taps
POT
V
SS
R
W
R
L
REV 1.1.7 2/6/03
www.xicor.com
Characteristics subject to change without notice.
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