X9259 Xicor, X9259 Datasheet
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X9259
Manufacturer Part Number
X9259
Description
Quad Digitally-Controlled (XDCP) Potentiometers
Manufacturer
Xicor
Datasheet
1.X9259.pdf
(25 pages)
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Single Supply / Low Power / 256-tap / 2-Wire bus
FEATURES
• Quad–Four separate potentiometers
• 256 resistor taps/pot–0.4% resolution
• 2-Wire Serial Interface for write, read, and
• Wiper Resistance, 100 Ω typical @ V
• 4 Nonvolatile Data Registers for Each
• Nonvolatile Storage of Multiple Wiper Positions
• Power On Recall. Loads Saved Wiper Position on
• Standby Current < 5µA Max
• V
• 50K Ω , 100K Ω versions of End to End Pot
• Endurance: 100,000 Data Changes per Bit per
• 100 yr. Data Retention
• Single Supply Version of X9258
• 24-Lead SOIC, 24-Lead TSSOP, 24-Lead XBGA
• Low Power CMOS
FUNCTIONAL DIAGRAM
REV 1.2.3 4/30/02
Interface
2-Wire
transfer operations of the potentiometer
Potentiometer
Power Up.
Resistance
Register
Bus
CC
AN99 • AN115 • AN124 •AN133 • AN134 • AN135
: 2.7V to 5.5V Operation
A
PPLICATION
Address
Status
Data
A V A I L A B L E
N
OTES AND
Quad Digitally-Controlled (XDCP
and Control
D
Interface
EVELOPMENT
V
V
Bus
CC
SS
S
Transfer
YSTEM
Inc/Dec
Control
Write
Read
CC
= 5V
Registers (WCR)
Power On Recall
Wiper Counter
Data Registers
www.xicor.com
16 Bytes
X9259
DESCRIPTION
The
potentiometer
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. Each 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.
R
X9259
TM
W0
) Potentiometers
R
R
H0
L0
(XDCP)
integrates
Characteristics subject to change without notice.
R
W1
50KΩ or 100KΩ versions
R
R
on
H1
L1
4
R
W2
a
digitally
monolithic
R
R
H2
L2
R
W3
controlled
CMOS
R
1 of 25
R
H3
L3