CAT5132_06 Datasheet, PDF (1/14 Pages) Catalyst Semiconductor – 16 Volt Digitally Programmable Potentiometer

CAT5132
16 Volt Digitally Programmable Potentiometer (DPP™)
with 128 Taps and 2-wire Interface
FEATURES
I Single linear DPP with 128 taps
I End-to-end resistance of 10kΩ, 50kΩ or 100kΩ
I 2-wire (I²C-like) interface
I Fast Up/Down wiper control mode
I Non-volatile wiper setting storage
I Automatic wiper setting recall at power-up
I Digital Supply range (V_CC): 2.7V to 5.5V
I Analog Supply range (V+): +8V to +16V
I Low Standby Current: 15µA
I 100 Year wiper setting memory
I Industrial Temperature range: -40^oC to +85^oC
I RoHS-compliant 10-pin MSOP package
APPLICATIONS
I LCD screen adjustment
I Volume control
I Mechanical potentiometer replacement
I Gain adjustment
I Line impedance matching
I VCOM setting adjustments
For Ordering Information details, see page 13.
DESCRIPTION
The CAT5132 is a high voltage Digitally Programmable
Potentiometer (DPP) with non-volatile wiper setting
memory, operating like a mechanical potentiometer.
The tap points between the 127 equal resistive elements
are connected to the wiper output via CMOS switches.
The switches are controlled by a 7-bit Wiper Control
Register (WCR). The wiper setting can be stored in a
7-bit non-volatile Data Register (DR). The WCR is
accessed via the 2-wire serial bus.
Upon power-up, the WCR is set to mid-scale (1000000).
After the power supply is stable, the contents of the DR
are transferred to the WCR and the wiper is returned to
the memorized setting.
The CAT5132 has two voltage supplies: V_CC, the digital
supply and V+, the analog supply. V+ can be much
higher than V_CC, allowing for 16V analog operations.
The CAT5132 can be used as a potentiometer or as a
two-terminal variable resistor.
BLOCK DIAGRAM
SDA
SCL
A0
A1
VCC
CONTROL LOGIC AND
ADDRESS DECODE
7-BIT
NONVOLATILE
MEMORY
REGISTER
(DR)
7-BIT WIPER
CONTROL
REGISTER
(WCR)
V+
127
128 TAP POSITION
DECODE CONTROL
0
© 2006 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
RH
RL
RW
Doc. No. 25092, Rev. 04