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CAT5116 Datasheet(PDF) 1 Page - Catalyst Semiconductor

No. de pieza CAT5116
Descripción Electrónicos  Log-Taper, 100-Tap Digitally Programmable Potentiometer (DPP??
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT5116 Datasheet(HTML) 1 Page - Catalyst Semiconductor

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CAT5116
© 2007 Catalyst Semiconductor, Inc.
1
Doc. No. MD-2118 Rev. K
Characteristics subject to change without notice
Log-Taper, 100-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
100-position, log-taper potentiometer
Non-volatile EEPROM wiper storage
10nA ultra-low standby current
Single-supply operation: 2.5V – 5.5V
Increment Up/Down serial interface
Resistance value: 32kΩ
Available in 8-pin MSOP, TSSOP, SOIC and DIP
packages
APPLICATIONS
Automated product calibration
Remote control adjustments
Offset, gain and zero control
Audio volume control
Sensor adjustment
Motor controls and feedback systems
Programmable analog functions
For Ordering Information details, see page 11.
FUNCTIONAL DIAGRAM
DESCRIPTION
The CAT5116 is a log-taper single digitally program-
mable potentiometer (DPP™) designed as a electro-
nic replacement for mechanical potentiometers.
Ideal for automated adjustments on high volume
production lines, DPP ICs are well suited for applica-
tions where equipment requiring periodic adjustment
is either difficult to access or located in a hazardous or
remote environment.
The CAT5116 contains a 100-tap series resistor array
connected between two terminals RH and RL. An
up/down counter and decoder that are controlled by
three input pins, determines which tap is connected to
the wiper, RW.
The wiper setting, stored in nonvolatile memory, is not
lost when the device is powered down and is
automatically reinstated when power is returned. The
wiper can be adjusted to test new system values
without effecting the stored setting.
Wiper-control of the CAT5116 is accomplished with
three input control pins, CS
¯¯ , U/D
¯, and INC
¯¯¯. The INC
¯¯¯
input increments the wiper in the direction which is
determined by the logic state of the U/D
¯ input. The CS
¯¯
input is used to select the device and also store the
wiper position prior to power down.
The digitally programmable potentiometer can be used
as a three-terminal resistive divider or as a two-terminal
variable resistor.
RH
165Ω
11Ω
10.4Ω
LOG
TAPER
RTOT= 32kΩ
RL
Control
and
Memory
Power On Recall
VCC
VCC
GND
U/D
INC
CS
RH
RL
RW
RW
Potentiometer Schematic
Block Diagram
General
INTERFACE
&
WIPER
CONTROL
EEPROM
GND
Potentiometer
R = 32kΩ
RH
RW
RL
U/D
INC
CS


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