The CAT5221WI-25 is a dual, non-volatile, digitally programmable potentiometer (DPP) from Catalyst Semiconductor. It provides two independent DPPs in a single package, offering a cost-effective solution for applications requiring multiple resistance adjustments. Each potentiometer has 64 wiper tap points and an I2C interface for programming.

Applications

• LCD Brightness and Contrast Adjustment
• Audio Volume and Tone Control
• Gain Adjustment in Amplifiers
• Sensor Calibration
• Power Supply Trimming

Features

• Dual Potentiometers in One Package
• 64 Tap Points per Potentiometer
• End-to-End Resistance: 25kΩ
• I2C Interface
• Non-Volatile Memory (EEPROM) for Wiper Position Storage
• Single Supply Operation: 2.5V to 5.5V
• Low Power Consumption
• Operating Temperature Range: -40°C to +85°C
• Package: SOIC-14

Benefits

• Cost-effective solution for dual potentiometer applications
• Precise and repeatable resistance adjustments
• I2C interface allows for easy programming and control
• Non-volatile memory retains wiper position after power down
• Low power consumption extends battery life in portable applications

The CAT5221WI-25's wiper positions are stored in non-volatile memory (EEPROM), ensuring that the desired resistance settings are retained even after the power is turned off. This is crucial in applications where consistent performance is required. The I2C interface provides a simple and flexible way to program and control the potentiometers. The device operates from a single supply voltage of 2.5V to 5.5V and offers low power consumption, making it suitable for a wide range of applications. The CAT5221WI-25 is available in a SOIC-14 package. The part provides dual adjustable resistances through digital control, and avoids performance degradation over time compared to mechanical alternatives. The individual potentiometers may be controlled independently using the I2C interface.