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CAT5111LI-50-G Datasheet(PDF) 1 Page - Catalyst Semiconductor

No. de pieza CAT5111LI-50-G
Descripción Electrónicos  100-Tap Digitally Programmable Potentiometer (DPP?? with Buffered Wiper
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT5111LI-50-G Datasheet(HTML) 1 Page - Catalyst Semiconductor

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CAT5111
© 2007 Catalyst Semiconductor, Inc.
1
Doc. No. MD-2008 Rev. P
Characteristics subject to change without notice
100-Tap Digitally Programmable Potentiometer (DPP™)
with Buffered Wiper
FEATURES
100-position linear taper potentiometer
Non-volatile EEPROM wiper storage;
buffered wiper
Low power CMOS technology
Single supply operation: 2.5V-6.0V
Increment up/down serial interface
Resistance values: 10kΩ, 50kΩ and 100kΩ
Available in PDIP, SOIC, TSSOP and MSOP
packages
APPLICATIONS
Automated product calibration
Remote control adjustments
Offset, gain and zero control
Tamper-proof calibrations
Contrast, brightness and volume controls
Motor controls and feedback systems
Programmable analog functions
For Ordering Information details, see page 10.
DESCRIPTION
The CAT5111 is a single digitally programmable
potentiometer (DPP™) designed as a electronic
replacement for mechanical potentiometers. Ideal for
automated adjustments on high volume production
lines, they are also well suited for applications where
equipment requiring periodic adjustment is either
difficult to access or located in a hazardous or remote
environment.
The CAT5111 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, RWB. The CAT5111 wiper is buffered by an
op amp that operates rail to rail. The wiper setting,
stored in non-volatile memory, is not lost when the
device is powered down and is automatically recalled
when power is returned. The wiper can be adjusted to
test new system values without effecting the stored
setting.
Wiper-control
of
the
CAT5111
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 buffered voltage divider. For applications
where the potentiometer is used as a 2-terminal
variable resistor, please refer to the CAT5113. The
buffered wiper of the CAT5111 is not compatible with
that application.
FUNCTIONAL DIAGRAM
Control
and
Memory
Power On Recall
VCC
GND
U/D
INC
CS
RH
RH
RWB
RWB
RL
RL
+
+
Electronic Potentiometer Implementation


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