APPLICATION NOTE
A V A I L A B L E
AN20 • AN42–53 • AN71 • AN73 • AN88 • AN91–92 • AN99 • AN115 • AN120 • AN124 • AN133 • AN134 • AN135
Terminal Voltages ±±Vꢀ ꢁ3 Taꢂs
X9ꢁ1ꢁ
Digitally Controlled Potentiometer (XDCP™)
FEATURES
DESCRIPTION
• Solid-state ꢂotentiometer
• ꢁ-wire serial interface
• ꢁ3 wiꢂer taꢂ ꢂoints
—Wiꢂer ꢂosition stored in nonvolatile memory
and recalled on ꢂower-uꢂ
The Xicor X9313 is a digitally controlled potentiometer
(XDCP). The device consists of a resistor array, wiper
switches, a control section, and nonvolatile memory.
The wiper position is controlled by a 3-wire interface.
The potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper
switching network. Between each element and at
either end are tap points accessible to the wiper
terminal. The position of the wiper element is
controlled by the CS, U/D, and INC inputs. The
position of the wiper can be stored in nonvolatile
memory and then be recalled upon a subsequent
power-up operation.
• ꢁ1 resistive elements
—Temꢂerature comꢂensated
—End to end resistance range ± 320
—Terminal voltagesꢀ –±V to +±V
• Low ꢂower CMOS
—V = ꢁV or ±V
CC
—Active currentꢀ ꢁmA max.
—Standby currentꢀ ±22µA max.
• High reliability
—Enduranceꢀ 122ꢀ222 data changes ꢂer bit
—Register data retentionꢀ 122 years
The device can be used as a three-terminal
potentiometer or as a two-terminal variable resistor in
a wide variety of applications including:
• R
• Packages
values = 1KΩꢀ 12KΩꢀ ±2KΩ
TOTAL
– control
—8-lead SOICꢀ MSOP and DIP
– parameter adjustments
– signal processing
BLOCK DIAGRAMS
5-Bit
U/D
INC
CS
R /V
31
H
H
Up/Down
Counter
V
(Supply Voltage)
CC
30
29
28
R /V
Up/Down
(U/D)
H
H
5-Bit
Nonvolatile
Memory
One
of
Control
Increment
(INC)
R
/V
W
and
W
Memory
Thirty
Two
Transfer
Gates
Resistor
Array
Device Select
(CS)
Decoder
R /V
L
L
2
Store and
Recall
Control
Circuitry
V
(Ground)
SS
1
0
V
V
CC
SS
General
R /V
L
L
R
/V
W
W
Detailed
Characteristics subject to change without notice. 1 of 10
REV 1.5 10/7/03
www.xicor.com