Low Noise, Low Power, I2C? Bus, 128 Taps

The digitally controlled potentiometer is implemented with a combination of resistor elements and CMOS switches. The position of the wiper is controlled by the user through the I2C bus interface. The potentiometer has an associated volatile Wiper Register (WR) and a non-volatile Initial Value Register (IVR) that can be directly written to and read by the user. The contents of the WR control the position of the wiper. At power up, the device recalls the contents of the DCP’s IVR to the WR.

Features

? Precision Digitally Controlled Potentiometer

- 99 Typical Accuracy Of Resistance Over Operational Conditions

- Zero-Compensated Wiper Resistance

? Integrated Digitally Controlled Potentiometer

- 128-Tap Positions

- I2C Serial Interface

- Pin Selectable Slave Address

- 10kΩ, 50kΩ and 100kΩTotal Resistance

- Monotonic Over-Temperature

- Non-Volatile EEPROM Storage of Wiper Position

- 0 to VCC Terminal Voltage

? Single 2.7V to 5.5V Supply

? High Reliability

- 50 Years Retention @ ≤ +55°C

- 15 Years Retention @ +125°C

- 1,000,000 Cycles Endurance

? 3mmx3mm Thin DFN Package – 0.75mm Max Thickness, 0.65mm Pitch

? Pb-Free (RoHS Compliant)

Applications

? Setting Precise Current Values for DC Margining and Backlight Control

? Replaces Complex Compensation Circuitry That Stores Values in Look-up Tables Needed for Precise Resistor Setting

? Setting Precise Resistance Values for Test and Measurement Circuits

? Adjust Specific Resistances in Analog Circuits

? Precise Calibration and Fine Tune-Up