ISL95811
Single Digitally Controlled Potentiometer (XDCP™)

Key Features

• 256 Resistor Taps - 0.4% Resolution
• I²C Serial Interface
• 5 General Purpose Non-Volatile Bytes
• Non-volatile Storage of Wiper Position
• Write Protection
• Wiper Resistance: 70Ω Typical @ V_CC = 3.3V
• Standby Current 10µA Max
• Power Supply: 2.7V to 5.5V
• 50kΩ, 10kΩ Total Resistance
• High Reliability
• Endurance: 1,000,000 Data Changes per Bit per Register
• Register Data Retention: 50 Years @ T ≤ +55°C
• 8 Ld MSOP and 8 Ld TDFN Packaging
• Pb-Free Pinouts (RoHS compliant)

Description

The ISL95811 integrates a digitally controlled potentiometer (XDCP) and non-volatile memory on a monolithic CMOS integrated circuit.

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 content of the WR controls the position of the wiper. At power-up the device recalls the contents of the DCP's IVR to the WR.

The DCP can be used as three-terminal potentiometer or as two-terminal variable resistor in a wide variety of applications including control, parameter adjustments and signal processing.