ISL22326UFR16Z

Digital Potentiometers Overview

The ISL22326UFR16Z is a dual digitally controlled potentiometer (XDCP) manufactured by Renesas Electronics. It features two independent potentiometers, each with 128 taps for precise resistance adjustment. The device communicates via an I²C bus interface and utilizes non-volatile memory to retain wiper positions during power-off states. Operating within a supply voltage range of 2.7V to 5.5V, it is designed for low-noise and low-power applications. The component is housed in a 16-lead TSSOP package with an exposed pad, suitable for surface-mount assembly in space-constrained designs.

Digital Potentiometers Feature Summary

• Dual-channel architecture with 128-tap resolution per potentiometer
• I²C serial interface supporting standard and fast modes
• Non-volatile memory retains wiper settings without external backup power
• Low noise performance with typical wiper resistance of 70Ω

Digital Potentiometers Applications

• Audio volume control and tone adjustment circuits
• Programmable gain amplifiers in instrumentation systems
• Voltage reference trimming and calibration
• LCD bias voltage generation

Digital Potentiometers Procurement Notes

Verify the specific suffix 'UFR16Z' corresponds to the 16-lead TSSOP package variant when sourcing. Confirm RoHS compliance status as manufacturing processes may evolve. Check for lead-free markings on the component body to ensure environmental regulation adherence. Validate that the supplier provides genuine Renesas or authorized Intersil products to avoid counterfeit risks.

Digital Potentiometers Selection Notes

Select this component when dual independent digital pots are required with I²C connectivity. Ensure the system operates within the 2.7V to 5.5V supply range. Verify that the 128-tap resolution meets the application's precision requirements compared to higher-resolution alternatives like the 256-tap ISL22323. Consider the thermal dissipation capabilities of the TSSOP package with exposed pad for high-current applications.

Digital Potentiometers Part Context

This part belongs to the ISL22326 series of low-power XDCPs. It serves as a dual-channel counterpart to single-channel devices like the ISL22316 and quad-channel variants such as the ISL22346. The series is characterized by its non-volatile storage capability and compatibility with standard I²C buses, making it a direct replacement for older analog potentiometers in digital control loops.

Digital Potentiometers Replacement Considerations

The ISL22323 offers similar functionality but with 256 taps instead of 128. The ISL22316 provides a single channel version of the same technology. Cross-reference pinouts and memory types to ensure compatibility before substitution.