CAT5113
100-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
DESCRIPTION
100-position linear taper potentiometer
Non-volatile EEPROM wiper storage
10 nA ultra-low standby current
The CAT5113 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.
Single supply operation: 2.5 V – 6.0 V
Increment up/down serial interface
Resistance values: 1 kΩ, 10 kΩ, 50 kΩ and
100 kΩ
The CAT5113 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 affecting the stored setting.
Wiper-control of the CAT5113 is accomplished with
Available in PDIP, SOIC, TSSOP and MSOP
packages
APPLICATIONS
Automated product calibration
Remote control adjustments
Offset, gain and zero control
Tamper-proof calibrations
¯¯
¯
¯¯¯
¯¯¯
three input control pins, CS, U/D, and INC. The INC
input increments the wiper in the direction which is
Contrast, brightness and volume controls
Motor controls and feedback systems
Programmable analog functions
¯
¯¯
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.
For Ordering Information details, see page 12.
FUNCTIONAL DIAGRAM
R
31
30
H
U/D
5-BIT
UP/DOWN
COUNTER
R
H
INC
CS
V
CC
29
28
R
H
R
W
R
L
U/D
5-BIT
ONE
OF
NONVOLATILE
MEMORY
Control
and
Memory
THIRTY TWO
DECODER
TRANSFER
GATES
RESISTOR
ARRAY
INC
CS
R
W
2
Power On Recall
STORE AND
RECALL
CONTROL
CIRCUITRY
1
0
V
CC
GND
GND
R
L
R
L
R
W
General
Detailed
Electronic Potentiometer
Implementation
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
1
Doc. No. MD-2009 Rev. Y