X9116 XDCP Datasheet

X9116 Datasheet, PDF, Equivalent


Part Number

X9116

Description

Digitally Controlled Potentiometer (XDCP)

Manufacture

Xicor

Total Page 11 Pages
Datasheet
Download X9116 Datasheet


X9116
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
• VCC = 2.7V and 5V
• Active current < 50µA max.
• Standby current < 1µA max.
• RTOTAL = 10K
• 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
VCC (Supply Voltage)
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
VSS (Ground)
General
RH/VH
RW/VW
RL/VL
RW-RL Resistance
RH
15
14
13
*
3
2
1
RL 0
10k
9.34k
8.68k
* k
2.08k
1.42k
760
100
REV 1.2 2/5/03
www.xicor.com
Characteristics subject to change without notice. 1 of 11

X9116
X9116
PIN DESCRIPTIONS
VH /RH and VL /RL
The high (VH/RH) and low (VL/RL) terminals of the
X9116 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is
VSS and the maximum is VCC.
VW/RW
Rw/Rw is the wiper terminal and is equivalent to the
movable terminal of a mechanical potentiometer. The
position of the wiper within the array is determined by
the control inputs. The wiper terminal series resistance
is typically 200to 400depending upon VCC.
Up/Down (U/D)
The U/D input controls the direction of the wiper move-
ment and whether the counter is incremented (up) or
decremented (down).
Increment (INC)
The INC input is negative-edge triggered. Toggling
INC will move the wiper and either increment or decre-
ment the counter in the direction indicated by the logic
level on the U/D input.
Chip Select (CS)
The device is selected when the CS input is LOW. The
current counter value is stored in nonvolatile memory
when CS is returned HIGH while the INC input is also
HIGH. After the store operation is complete the X9116
will be placed in the low power standby mode until the
device is selected once again.
PIN CONFIGURATION
INC
U/D
VH/RH
VSS
SOIC/MSOP
18
27
X9116
36
45
VCC
CS
VL/RL
VW/RW
PIN NAMES
Symbol
VH/RH
VW/RW
VL/RL
VSS
VCC
U/D
INC
CS
Description
High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage
Up/Down Control Input
Increment Control Input
Chip Select Input
PRINCIPLES OF OPERATION
There are three sections of the X9116: the input con-
trol, counter and decode section; the nonvolatile mem-
ory; and the resistor array. The input control section
operates just like an up/down counter. The output of
this counter is decoded to turn on a single electronic
switch connecting a point on the resistor array to the
wiper output. Under the proper conditions the contents
of the counter can be stored in nonvolatile memory
and retained for future use. The resistor array is com-
prised of 15 individual resistors connected in series. At
either end of the array and between each resistor is an
electronic switch that transfers the potential at that
point to the wiper pin.
The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the
last position. That is, the counter does not wrap
around when clocked to either extreme.
The electronic switches on the device operate in a
“make before break” mode when the wiper changes
tap positions. If the wiper is moved several positions,
multiple taps are connected to the wiper for tIW (INC to
VW change). The RTOTAL value for the device can tem-
porarily be reduced by a significant amount if the wiper
is moved several positions.
When the device is powered-down, the last wiper posi-
tion stored will be maintained in the nonvolatile mem-
ory. When power is restored, the contents of the
memory are recalled and the wiper is set to the value
last stored.
REV 1.2 2/5/03
www.xicor.com
Characteristics subject to change without notice. 2 of 11


Features APPLICATION NOTE A V A I L A B L E AN99 • AN115 • AN120 • AN124 • AN133 • AN134 Low Noise, Low Power, Low C ost X9116 Digitally Controlled Potenti ometer (XDCP™) FEATURES • • • • • • • Solid-state nonvolat ile 16 wiper taps 3-wire up/down serial interface VCC = 2.7V and 5V Active cur rent < 50µA max. Standby current < 1µ A max. RTOTAL = 10KΩ Packages: MSOP-8 , SOIC DESCRIPTION The Xicor X9116 is a digitally controlled nonvolatile poten tiometer designed to be used in trimmer applications. The pot consists of 15 e qual resistor segments that connect to the wiper pin through programmable CMOS switches. The tap position is programm ed through a 3-wire up/down serial port . The last position of the wiper is sto red in a nonvolatile memory location wh ich is recalled at the time of power up of the device. The wiper moves through sequential tap positions with inputs o n the serial port. A falling edge on IN C (bar) causes the tap position to increment one position up or down based on whether the U/D (.
Keywords X9116, datasheet, pdf, Xicor, Digitally, Controlled, Potentiometer, XDCP, 9116, 116, 16, X911, X91, X9, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)