CAT5113_08 Datasheet, PDF (1/13 Pages) Catalyst Semiconductor – 100-Tap Digitally Programmable Potentiometer (DPP™)

CAT5113
100-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
„ 100-position linear taper potentiometer
„ Non-volatile EEPROM wiper storage
„ 10nA ultra-low standby current
„ Single supply operation: 2.5V – 6.0V
„ Increment up/down serial interface
„ Resistance values: 1kΩ, 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 12.
DESCRIPTION
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.
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 affecting the stored setting.
Wiper-control of the CAT5113 is accomplished with
three input control pins, C¯¯S, U/D¯, and I¯N¯C¯. The I¯N¯C¯
input increments the wiper in the direction which is
determined by the logic state of the U/D¯ input. The C¯¯S
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.
FUNCTIONAL DIAGRAM
V_CC
U/D
Control
INC
and
Memory
CS
Power On Recall
GND
U/D
INC
CS
R_H
R_W
R_L
V_CC
GND
General
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5-BIT
UP/DOWN
COUNTER
5-BIT
NONVOLATILE
MEMORY
STORE AND
RECALL
CONTROL
CIRCUITRY
31
30
29
ONE ²⁸
OF
THIRTY TWO
DECODER
2
1
0
Detailed
R_H
R_H
TRANSFER RESISTOR
GATES
ARRAY
R_W
R_L
R_L
R_W
Electronic Potentiometer
Implementation
1
Doc. No. MD-2009 Rev. V