ISL90810UIU8Z-TK

Digital Potentiometers Overview

The ISL90810UIU8Z-TK is a single digitally controlled potentiometer (XDCP) from Renesas Electronics, housed in an 8-lead MSOP package. It features 256 resistor taps providing 0.4% resolution and operates on a 2.7V to 5.5V supply. The device utilizes an I2C serial interface for direct wiper control via an 8-bit volatile Wiper Register. Key electrical characteristics include a typical wiper resistance of 70Ω at 3.3V, a standby current of 5µA maximum, and a power-on preset to the mid-scale position (tap 128).

Digital Potentiometers Feature Summary

• 256-tap resolution with 0.4% step accuracy.
• I2C serial interface supporting read/write operations.
• Low standby current of 5µA maximum.
• Power-on reset to mid-scale (128 tap position).

Digital Potentiometers Applications

• Control systems requiring digital parameter adjustment.
• Signal processing circuits needing variable gain or attenuation.
• Voltage divider applications for reference level setting.

Digital Potentiometers Procurement Notes

Verify that the ordering suffix '-TK' corresponds to tape and reel packaging as specified in the datasheet. Confirm the specific resistance value variant (10kΩ or 50kΩ) required for the application, as the base model number does not explicitly define the total resistance in the provided text without cross-referencing the full part code structure.

Digital Potentiometers Selection Notes

Select between the 10kΩ or 50kΩ total resistance variants based on circuit impedance requirements. Ensure the operating temperature range matches the Industrial (-40°C to +85°C) or Automotive (-40°C to +105°C) grade needed. Verify I2C bus compatibility and pull-up resistor values for the target SDA/SCL frequency.

Digital Potentiometers Part Context

This component belongs to the XDCP™ family of digitally controlled potentiometers. It integrates CMOS switches and resistor elements on a monolithic IC. The device replaces mechanical potentiometers in applications where digital control and non-volatile memory retention are beneficial, though this specific version uses a volatile wiper register.

Digital Potentiometers Replacement Considerations

The datasheet lists ISL90810UAU8Z-TK as a recommended replacement for discontinued versions. Verify pinout and electrical specifications match before substitution.

Digital Potentiometers FAQ

What is the default wiper position upon power-up?

The wiper commences at the mid-scale position, corresponding to tap 128.

How is the wiper position controlled?

The position is controlled by writing to the 8-bit volatile Wiper Register (WR) via the I2C serial interface.

What is the typical wiper resistance?

The typical wiper resistance is 70Ω when measured at VCC = 3.3V.