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X9319 Datasheet

  • X9319

  • Digitally Controlled Potentiometer (XDCP)

  • 10頁

  • XICOR   XICOR

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Digitally Controlled Potentiometer (XDCP
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)
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Solid-state potentiometer
3-wire serial interface
Terminal voltage, 0 to +10V
100 wiper tap points
鈥擶iper position stored in nonvolatile memory
and recalled on power-up
99 resistive elements
鈥擳emperature compensated
鈥擡nd to end resistance range 鹵 20%
Low power CMOS
鈥擵
CC
= 5V
鈥擜ctive current, 3mA max.
鈥擲tandby current, 1mA max.
High reliability
鈥擡ndurance, 100,000 data changes per bit
鈥擱egister data retention, 100 years
R
TOTAL
value = 10K
鈩?/div>
and 50K
鈩?/div>
Packages
鈥?-lead SOIC and DIP
DESCRIPTION
X9319
The Xicor X9319 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 99 resistive elements and a wiper switch-
ing 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.
The device can be used as a three-terminal
potentiometer for voltage control or as a two-terminal
variable resistor for current control in a wide variety of
applications.
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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APPLICATIONS
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
LCD bias control
DC bias adjustment
Gain and offset trim
Laser diode bias control
Voltage regulator output control
BLOCK DIAGRAM
U/D
INC
CS
Up/Down
Counter
99
98
97
7-Bit
Nonvolatile
Memory
96
One
of
One
Hundred
Decoder
2
V
SS
(Ground)
General
V
CC
V
SS
Store and
Recall
Control
Circuitry
1
0
R
L
R
W
Detailed
XDCP is a trademark of Xicor, Inc.
R
H
V
CC
(Supply Voltage)
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
R
H
R
W
Wiper
Switches
Resistor
Array
R
L
REV 1.7 7/10/03
www.xicor.com
1 of 10

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