DESCRIPTION
The CAT5132 is a high voltage Digitally Programmable Potentiometer (DPP) integrated with EEPROM memory and control logic to operate in a similar manner as 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 output with CMOS switches. A separate 7-bit 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 wiper settings. Writing to the wiper control register or the nonvolatile data register is via a 2-wire serial bus (I2C-like).

FEATURES
■ Single linear Digitally Programmable Potentiometer
■ 128 Resistor taps
■ End-to-end resistance of 10kΩ, 50kΩ & 100kΩ
■ Potentiometer control and memory access via 2-wire interface (I2C-like)
■ Nonvolatile memory storage for wiper settings
■ Automatic recall of saved wiper setting at power up
■ Special increment/decrement instruction mode for automatic trimming adjustments
■ VCC operation from 2.7 V to 5.5 V
■ V+ (Analog Voltage Supply) operation from +8 V to +15V
■ Standby current less than 15 µA
■ 100 year nonvolatile memory data retention
■ 10-pin MSOP package
■ Operating temperature of -40˚C to + 85˚C

APPLICATIONS
■ LCD screen adjustment
■ Volume control
■ Mechanical potentiometer replacement
■ Gain adjustment
■ Line impedance matching
■ VCOM setting adjustments