CAT5113 Datasheet, PDF (1/9 Pages) Catalyst Semiconductor – 100-Tap Digitally Programmable Potentiometer

CAT5113
100-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
APPLICATIONS
ALOGEN ^FR
LEA _{D F REETM}
I 100-position linear taper potentiometer
I Non-volatile EEPROM wiper storage
I 10nA ultra-low standby current
I Single supply operation: 2.5V-6.0V
I Increment Up/Down serial interface
I Resistance values: 1kΩ ,10kΩ , 50kΩ and 100kΩ
I Available in PDIP, SOIC, TSSOP and MSOP packages
I Automated product calibration
I Remote control adjustments
I Offset, gain and zero control
I Tamper-proof calibrations
I Contrast, brightness and volume controls
I Motor controls and feedback systems
I Programmable analog functions
DESCRIPTION
The CAT5113 is a single digitally programmable
potentiometer (DPP™) designed as a electronic
replacement for mechanical potentiometers and trim
pots. 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 CAT5113 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_W. 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 CAT5113 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. DPPs bring variability and
programmability to a wide variety of applications
including control, parameter adjustments, and
signal processing.
FUNCTIONAL DIAGRAM
Vcc (Supply Voltage)
UP/DOWN
(U/D)
INCREMENT
(INC)
DEVICE SELECT
(CS)
Control
and
Memory
POR
GND
GENERAL
GENERAL
U/D
INC
CS
R_H / V_H
RW / VW
R L / VL
Vcc
VSS
7-BIT
UP/DOWN
COUNTER
7-BIT
NONVOLATILE
MEMORY
STORE AND
RECALL
CONTROL
CIRCUITRY
99
98
97
ONE 28
OF
ONE HUNDRED
DECODER
2
1
0
TRANSFER
GATES
RESISTOR
ARRAY
DETAILED
R_H / V_H
R L / VL
RW / VW
V_H /R_H
VW /RW
VL / R L
ELECTRONIC POTENTIOMETER
IMPLEMENTATION
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 2009, Rev. R