ISL23425TFVZ-TK

Digital Potentiometers Overview

The ISL23425TFVZ-TK is a dual-channel digitally controlled potentiometer (XDCP) from the Renesas ISL23425 series. It features two independent 100 kOhm resistive elements, each with 256 linear taps for precise resistance adjustment. The device operates on a single supply voltage ranging from 1.7 V to 5.5 V and draws a typical supply current of 100 µA. Communication is handled via a standard Serial Peripheral Interface (SPI). The wiper position data is stored in volatile memory, requiring initialization upon power-up. It is housed in a 14-lead Thin Shrink Small Outline Package (TSSOP) and supports an operating temperature range from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Dual-channel architecture with two independent 100 kOhm potentiometers
• 256 linear tap resolution per channel for fine adjustment
• Low-power operation with 100 µA supply current at 3.3 V
• SPI digital interface for control and status reading
• Wide supply voltage range of 1.7 V to 5.5 V

Digital Potentiometers Applications

• Power supply margining and monitoring
• Trimming sensor circuits for calibration
• Gain adjustment in battery-powered instruments
• RF power amplifier bias compensation

Digital Potentiometers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to PCB assembly. Check for specific end-of-life notices or obsolescence warnings associated with this part number to ensure long-term availability for production runs.

Digital Potentiometers Selection Notes

Select this component when dual-channel precision adjustment is required within a low-voltage system. Ensure the application can accommodate volatile memory behavior, as wiper positions are lost during power cycles. Verify that the SPI bus timing requirements align with the host microcontroller's capabilities and that the TSSOP-14 package fits the available board space constraints.

Digital Potentiometers Part Context

This part belongs to the ISL23425 family of low-voltage XDCPs. Variants within the series differ by resistance value (10 kOhm or 100 kOhm), taper type, and packaging options such as UQFN. The TFVZ suffix typically denotes the specific tape-and-reel packaging configuration for automated assembly processes.

Digital Potentiometers Replacement Considerations

Direct pin-to-pin replacements may include other models from the ISL23425 series with identical electrical characteristics but different resistance values or packages. Cross-reference datasheets to confirm compatibility of SPI command sets and voltage tolerances before substituting.