ISL95811UFRTZ

Digital Potentiometers Overview

The ISL95811UFRTZ is a single digitally controlled potentiometer (XDCP) with non-volatile memory, manufactured by Renesas Electronics Corporation. It features an I2C serial interface and offers 256 resistor taps for precise control. The device provides 50kΩ total resistance in an 8-lead 3x3mm TDFN package. Key specifications include a typical wiper resistance of 70Ω at VCC=3.3V, standby current of 10µA max, and operation within a supply voltage range of 2.7V to 5.5V. It supports extended industrial temperatures from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Single XDCP with 256 taps and 50kΩ total resistance
• I2C serial interface with hardware write protection (WP pin)
• Non-volatile storage of wiper position and 5 general-purpose bytes
• Extended industrial temperature range (-40°C to +125°C)

Digital Potentiometers Applications

• Control systems requiring parameter adjustments
• Signal processing applications
• Voltage divider configurations

Digital Potentiometers Procurement Notes

Verify the datasheet revision and manufacturer documentation before implementation. Confirm that the specific ordering suffix matches the required package type and resistance value. Ensure compliance with RoHS standards and check for any product change notices related to this component.

Digital Potentiometers Selection Notes

Select the ISL95811UFRTZ when a 50kΩ digital potentiometer with I2C control is needed. Consider the 8-lead TDFN package for space-constrained designs. Verify that the 256-tap resolution and non-volatile memory requirements align with the application's needs.

Digital Potentiometers Part Context

The ISL95811 series includes variants with different resistances (10kΩ and 50kΩ) and packages (MSOP and TDFN). The 'U' suffix indicates 50kΩ resistance, while 'FRTZ' denotes the 8-lead 3x3mm TDFN package. This part is part of the XDCP family designed for low noise and low power consumption.

Digital Potentiometers Replacement Considerations

The datasheet recommends the ISL95810 as a replacement. Verify compatibility regarding pinout, electrical characteristics, and software interface before substitution.

Digital Potentiometers FAQ

What is the function of the WP pin?

The WP (Write Protect) pin prevents write operations to the device when held LOW, protecting both volatile and non-volatile memory.

How does the device handle power-up?

Upon power-up, the wiper register resets to 80h (center position) initially, then recalls the stored value from the non-volatile Initial Value Register (IVR).

What is the maximum standby current?

The maximum standby current is 10µA at VCC = +5.5V and 5µA at VCC = +3.6V.