X9116 Datasheet, PDF (1/11 Pages) Xicor Inc. – Digitally Controlled Potentiometer (XDCP)

APPLICATION NOTE
AVAILABLE
AN99 • AN115 • AN120 • AN124 • AN133 • AN134
Low Noise, Low Power, Low Cost
X9116
Digitally Controlled Potentiometer (XDCP^™)
FEATURES
• Solid-state nonvolatile
• 16 wiper taps
• 3-wire up/down serial interface
• V_CC = 2.7V and 5V
• Active current < 50µA max.
• Standby current < 1µA max.
• R_TOTAL = 10KΩ
• Packages: MSOP-8, SOIC
DESCRIPTION
The Xicor X9116 is a digitally controlled nonvolatile
potentiometer designed to be used in trimmer applica-
tions. The pot consists of 15 equal resistor segments
that connect to the wiper pin through programmable
CMOS switches. The tap position is programmed
through a 3-wire up/down serial port. The last position
of the wiper is stored in a nonvolatile memory location
which is recalled at the time of power up of the device.
The wiper moves through sequential tap positions with
inputs on the serial port. A falling edge on INC (bar)
causes the tap position to increment one position up or
down based on whether the U/D (bar) pin is held high
or low.
The X9116 can be used in many applications requiring
a variable resistance. In many cases it can replace a
mechanical trimmer and offers many advantages such
as temperature and time stability as well as the reli-
ability of a solid state solution.
BLOCK DIAGRAM
V_CC (Supply Voltage)
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
V_SS (Ground)
General
R_H/V_H
R_W/V_W
R_L/V_L
R_W-R_L Resistance
R_H
15
14
13
*
3
2
1
R_L ⁰
10kΩ
9.34kΩ
8.68kΩ
* kΩ
2.08kΩ
1.42kΩ
760Ω
100Ω
REV 1.2 2/5/03
www.xicor.com
Characteristics subject to change without notice. 1 of 11