鈥?/div>
Solid-state potentiometer
3-wire serial interface
Terminal voltage, 0 to +8V
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>
Packages
鈥? Ld SOIC and DIP
Pb-free plus anneal available (RoHS compliant)
DESCRIPTION
The Intersil X9318 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 potentiome-
ter for voltage control or as a two-terminal variable resis-
tor for current control in a wide variety of applications.
PIN CONFIGURATION
DIP/SOIC
INC
U/D
R
H
V
SS
1
2
3
4
X9318
8
7
6
5
V
CC
CS
R
L
R
W
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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
V
CC
(Supply Voltage)
U/D
INC
CS
Up/Down
Counter
99
98
97
7-Bit
Nonvolatile
Memory
One 96
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
R
H
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
R
H
R
W
Wiper
Switches
Resistor
Array
R
L
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
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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