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Semiconductor Components Industries, LLC, 2013
June, 2013 − Rev. 20
1 Publication Order Number:
CAT5111/D
CAT5111
100‐tap Digital
Potentiometer (POT)
with Buffered Wiper
Description
The CAT5111 is a single digital POT designed as an 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 R
H
and R
L
. An up/down counter and decoder
that are controlled by three input pins, determines which tap is
connected to the wiper, R
WB
. 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 digital POT 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.
Features
100-position Linear Taper Potentiometer
Non-volatile EEPROM Wiper Storage; Buffered Wiper
Low Power CMOS Technology
Single Supply Operation: 2.5 V − 6.0 V
Increment Up/Down Serial Interface
Resistance Values: 10 kW, 50 kW and 100 kW
Available in PDIP, SOIC, TSSOP and MSOP Packages
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
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
http://onsemi.com
PIN CONFIGURATIONS
R
H
R
WB
R
L
U/D
INC
V
CC
CS
1
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
ORDERING INFORMATION
SOIC−8
V SUFFIX
CASE 751BD
MSOP−8
Z SUFFIX
CASE 846AD
GND
PDIP (L), SOIC (V), MSOP (Z)
PDIP−8
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
Increment ControlINC
Up/Down ControlU/D
Potentiometer High TerminalR
H
GroundGND
Buffered Wiper TerminalR
WB
Potentiometer Low TerminalR
L
FunctionPin Name
PIN FUNCTION
Chip SelectCS
Supply VoltageV
CC
TSSOP (Y)
(Top Views)
GND
R
H
U/D
INC
R
WB
CS
V
CC
R
L
1
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