Renesas ISL22416UFRT10Z-TK

Overview

ISL22416UFRT10Z-TK from Renesas Electronics (formerly Intersil) is a single-channel, 128-tap digitally controlled potentiometer (XDCP™) with SPI interface, non-volatile initial value storage, and 50kΩ end-to-end resistance. It operates from 2.7V to 5.5V, features 70Ω typical wiper resistance at 3.3V, and supports extended industrial temperature range (–40°C to +125°C). It is used for precision analog trimming in power supply feedback loops, sensor calibration, and programmable gain control circuits.

For engineers reviewing the ISL22416UFRT10Z-TK datasheet, ISL22416UFRT10Z-TK pinout, ISL22416UFRT10Z-TK application, or ISL22416UFRT10Z-TK equivalent, this page provides verified technical context, validated pin functions, confirmed package dimensions (10-lead 3×3 mm TDFN), real-world application scenarios, and two rigorously cross-checked alternative parts with documented functional differences.

Technical Context

The ISL22416UFRT10Z-TK implements a monolithic CMOS resistor ladder with CMOS switch matrix, enabling precise 7-bit (0–127) wiper positioning via SPI Mode 0 (rising-edge clock-in, falling-edge clock-out). Its volatile Wiper Register (WR) controls real-time resistance division, while the non-volatile Initial Value Register (IVR) ensures consistent power-up position recall.

Shutdown mode is activated either by pulling SHDN low or setting the SHDN bit in the Access Control Register (ACR), placing RH–RL in open-circuit and RW–RL in short-circuit - with full register accessibility retained. The device supports up to 5 MHz SPI clock frequency and guarantees monotonicity in both voltage-divider and rheostat modes.

Key Specifications

Pinout & Package

ISL22416UFRT10Z-TK is housed in a Pb-free, RoHS-compliant 10-lead 3×3 mm Thin Dual Flat No-Lead (TDFN) package (PKG DWG L10.3x3B), featuring an exposed thermal pad for enhanced power dissipation and board-level reliability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled potentiometer applications.

Compared with ISL22416UFRT10Z-TK, ISL22316WFRT10Z offers lower resistance but lacks shutdown control, while AD5175BRMZ-50 provides I²C compatibility and 2× resolution at the cost of interface change and reduced max clock speed - making each suitable only for specific system-level trade-offs.

Availability

ISL22416UFRT10Z-TK is available at Aetrix Electronics and suitable for power supply feedback trimming, sensor calibration, programmable gain amplification, and laser diode bias control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ISL22416UFRT10Z-TK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics acquired Intersil in 2017 and maintains its precision analog portfolio, emphasizing high-reliability, automotive-qualified, and industrial-grade mixed-signal ICs.

The ISL22416UFRT10Z-TK belongs to Renesas' XDCP™ (eXternally Digital Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in closed-loop analog control systems demanding non-volatility, monotonicity, and robust temperature performance.

FAQ

What is the package type and footprint of ISL22416UFRT10Z-TK?

ISL22416UFRT10Z-TK uses a 10-lead 3×3 mm Thin Dual Flat No-Lead (TDFN) package with exposed thermal pad (drawing L10.3x3B). It is RoHS-compliant and Pb-free, with 0.5 mm pitch and JEDEC-standard solder mask defined pads. The package requires reflow per IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) profile for plastic packages.

Does ISL22416UFRT10Z-TK support both voltage-divider and rheostat configurations?

Yes, ISL22416UFRT10Z-TK supports both configurations: as a three-terminal voltage divider (RH–RW–RL) and as a two-terminal variable resistor (e.g., RW–RL with RH floating). Its datasheet specifies monotonicity, INL, DNL, and tempco separately for both modes, confirming validated performance in either topology.

How does the non-volatile memory in ISL22416UFRT10Z-TK retain wiper settings?

ISL22416UFRT10Z-TK stores the initial wiper position in a non-volatile Initial Value Register (IVR) that retains data for 50 years at ≤+55°C. At power-on, the IVR contents are automatically loaded into the volatile Wiper Register (WR), restoring the last-saved position without host intervention.

Can ISL22416UFRT10Z-TK be used with 3.3V and 5V microcontrollers?

Yes, ISL22416UFRT10Z-TK operates from 2.7V to 5.5V and accepts digital inputs (SCK, SDI, CS, SHDN) with VIH ≥0.7×VCC and VIL ≤0.3×VCC. It interfaces natively with both 3.3V and 5V SPI masters without level shifters, provided VCC matches the host logic supply.

What is the maximum SPI clock frequency supported by ISL22416UFRT10Z-TK?

ISL22416UFRT10Z-TK supports SPI clock frequencies up to 5 MHz, with minimum clock cycle time of 200 ns, high/low pulse widths ≥100 ns, and setup/hold times ≥50 ns. This allows fast wiper updates - e.g., full 128-step sweep in under 1 ms - suitable for dynamic calibration sequences.