Renesas ISL22416WFU10Z

Overview

ISL22416WFU10Z from Intersil is a single-channel digitally controlled potentiometer (XDCP™) with SPI interface, 128-tap resolution, 10 kΩ end-to-end resistance, non-volatile wiper position storage, and shutdown mode. It operates from 2.7V to 5.5V and delivers low-noise, low-power analog adjustment in voltage divider or rheostat configurations for precision biasing and calibration circuits.

For engineers reviewing the ISL22416WFU10Z datasheet, ISL22416WFU10Z pinout, ISL22416WFU10Z application, or ISL22416WFU10Z equivalent, key selection criteria include its 10 kΩ resistance option, MSOP-10 package, ±50 ppm/°C end-to-end temperature coefficient, 70 Ω typical wiper resistance at 3.3V, and guaranteed monotonicity with ±0.5 LSB DNL in voltage divider mode.

Technical Context

The ISL22416WFU10Z implements a monolithic CMOS resistor ladder with CMOS switch matrix, controlled via SPI Mode 0 (rising-edge clock-in, falling-edge clock-out). Its volatile Wiper Register (WR) and non-volatile Initial Value Register (IVR) enable power-up recall of last-set wiper position without external memory.

Shutdown mode-activated by either SHDN pin low or ACR bit 6 = 0-forces RH–RL open-circuit and shorts RW to RL while preserving register contents; recovery time is 1.5 µs. The device supports full SPI read/write access (including ACR, WR, IVR) even during shutdown.

Key Specifications

Pinout & Package

ISL22416WFU10Z is housed in a Pb-free, RoHS-compliant 10-lead MSOP package (M10.118, JEDEC MO-187BA), measuring 3.0 mm × 3.0 mm × 1.0 mm with 0.5 mm lead pitch. Thermal resistance θ_JA = 162 °C/W enables operation up to +125°C ambient without forced cooling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL22416WFU10Z, ISL22316WFU10Z offers simpler interface but sacrifices non-volatility and resolution, while AD5170BRMZ-10 provides finer granularity at the cost of reduced analog precision and noise immunity-making ISL22416WFU10Z optimal for high-stability, SPI-based industrial calibration.

Availability

ISL22416WFU10Z is available at Aetrix Electronics and suitable for laser diode bias control, programmable gain amplifiers, ADC reference dividers, and power supply trim circuits requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ISL22416WFU10Z 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

Intersil Corporation (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The ISL22416 family was designed specifically for high-reliability, digitally programmable analog adjustment in harsh-environment applications-emphasizing non-volatile memory endurance, wide temperature operation, and robust SPI interface timing.

FAQ

What is the resistance tolerance and temperature coefficient of ISL22416WFU10Z?

The ISL22416WFU10Z has a total resistance of 10 kΩ with ±20% initial tolerance and an end-to-end temperature coefficient of ±50 ppm/°C. This means resistance variation due to temperature remains within ±0.75% over the full –40°C to +125°C operating range, supporting stable performance in industrial and automotive applications where thermal drift must be minimized.

Does ISL22416WFU10Z retain its wiper position after power cycling?

Yes, ISL22416WFU10Z retains its wiper position after power cycling via its non-volatile Initial Value Register (IVR), which stores the last-written wiper value with 50-year data retention at ≤+55°C. At power-on, the IVR content is automatically loaded into the volatile Wiper Register (WR), restoring the previous setting without host intervention.

Can ISL22416WFU10Z operate in both voltage divider and rheostat modes?

Yes, ISL22416WFU10Z supports both configurations: as a three-terminal voltage divider (RH–RW–RL) for adjustable reference generation, and as a two-terminal rheostat (RW–RL or RW–RH) for variable current limiting or gain control. Pin connections and register settings determine mode-no hardware change is needed.

What is the maximum SPI clock frequency supported by ISL22416WFU10Z?

The ISL22416WFU10Z supports SPI clock frequencies up to 5 MHz, with minimum clock high/low times of 100 ns each. This allows sub-microsecond wiper updates (t_WRT = 1.5 µs), enabling real-time gain or offset adjustments in closed-loop systems without introducing latency bottlenecks.

How does shutdown mode affect the terminals of ISL22416WFU10Z?

In shutdown mode, ISL22416WFU10Z opens the RH–RL path and shorts RW to RL, effectively removing the potentiometer from the signal path while preserving register contents. The SPI interface remains fully accessible, allowing register reads/writes and shutdown exit without reset-critical for dynamic power management in multi-rail systems.