CAT5133
16 Volt Digitally Programmable Potentiometer (DPP
TM
)
with 128 Taps and an Increment Decrement Interface
FEATURES
Single linear DPP with 128 taps
End-to-end resistance of 10kΩ, 50kΩ or 100kΩ
2-wire interface
Fast Up/Down wiper control mode
Non-volatile wiper setting storage
Automatic wiper setting recall at power-up
Digital Supply range (V
CC
): 2.7V to 5.5V
Analog Supply range (V+): +8V to +16V
Low Standby Current: 15μA
100 Year wiper setting memory
Industrial Temperature range: -40ºC to +85ºC
RoHS-compliant 10-pin MSOP package
DESCRIPTION
The CAT5133 is a high voltage Digital Programmable
Potentiometer (DPP) integrated with E2PROM
memory and control logic to operate in a similar
manner to a mechanical potentiometer. The DPP
consists of a series of resistive elements connected
between two externally accessible end points. The tap
points between each resistive element are connected
to the wiper outputs with CMOS switches. A 7-bit
wiper control register (WCR) independently controls
the wiper tap switches for the DPP. Associated with
the control register is a 7-bit nonvolatile memory data
register (DR) used for storing the wiper settings.
Changing the value of the wiper control register or
storing that value into the nonvolatile memory is
performed via a 3-input Increment-Decrement interface.
The CAT5133 comes with 2 voltage supply inputs: V
CC
(digital supply voltage) input and V+ (analog bias
supply) input. Providing separate Digital and Analog
inputs allow the potentiometer terminals to be as much
as 10 volts above V
CC
and 16 volts above ground.
The CAT5133 can be used as a potentiometer or as a
two terminal, variable resistor. It is designed for circuit
level or system level adjustments in a wide variety of
applications.
On power-up, the contents of the nonvolatile data
register (DR) are transferred to the wiper control
register (WCR) and the wiper is positioned to that
location. The CAT5133 is shipped with the DR
programmed to position 64.
APPLICATION
LCD screen Adjustment
Volume Control
Mechanical potentiometer replacement
Gain adjustment
Line impedance matching
VCOM settings adjustment
BLOCK DIAGRAM
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-2125 Rev. C
CATALYST [ CATALYST SEMICONDUCTOR ]
