Renesas ISL22316WFRT10Z

Overview

ISL22316WFRT10Z from Renesas (formerly Intersil) is a single-channel, 128-tap digitally controlled potentiometer (XDCP™) with I²C interface, non-volatile wiper storage, and 10kΩ end-to-end resistance in a 10-lead TDFN package. It operates from 2.7V to 5.5V, delivers ±50 ppm/°C end-to-end tempco, and supports shutdown mode with ≤5µA current at +85°C - used for precision gain/offset trimming in industrial sensor signal chains.

For engineers reviewing the ISL22316WFRT10Z datasheet, ISL22316WFRT10Z pinout, ISL22316WFRT10Z application, or ISL22316WFRT10Z equivalent, key selection criteria include I²C address configurability (A0/A1), wiper resistance (70Ω typ. @ 3.3V), monotonicity (±0.5 LSB DNL), power-on recall behavior, and TDFN-10 thermal performance (θJA = 74°C/W).

Technical Context

The ISL22316WFRT10Z implements a resistor ladder with CMOS switches in "make-before-break" switching mode, enabling glitch-free wiper transitions. Its volatile Wiper Register (WR) controls real-time position, while the non-volatile Initial Value Register (IVR) retains the last setting across power cycles.

It uses standard I²C protocol (400kHz max) with open-drain SDA/SCL, two address pins (A0/A1) supporting up to four devices per bus, and hardware/software shutdown control via SHDN pin and ACR register bit. Power-up recall occurs at VCC ≥ 2.0V with 3ms delay.

Key Specifications

Pinout & Package

ISL22316WFRT10Z is housed in a RoHS-compliant, 10-lead 3×3 mm TDFN package (PKG DWG L10.3x3B) with exposed thermal pad. Pin 1 is marked by dot; pin numbering follows top-view clockwise layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ10 and MCP45HV51-103E/MS, ISL22316WFRT10Z uniquely combines I²C compatibility, 2.7–5.5V operation, hardware shutdown, and integrated non-volatile storage - reducing BOM count and eliminating boot-time calibration overhead in embedded systems.

Availability

ISL22316WFRT10Z is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, audio volume control, and battery management reference tuning requiring stable component supply across extended temperature ranges.

Supply support for ISL22316WFRT10Z 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 continues its legacy of precision analog and power management ICs. The company serves industrial, automotive, and infrastructure markets with high-reliability components.

The ISL22316WFRT10Z belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimmers in automated calibration, adaptive biasing, and programmable analog signal conditioning applications.

FAQ

What is the default wiper position after power-up for the ISL22316WFRT10Z?

At power-up, the ISL22316WFRT10Z initially resets the Wiper Register (WR) to 0x40 (64 decimal), placing the wiper near mid-scale. Within 3ms, it recalls the stored value from the non-volatile Initial Value Register (IVR) and loads it into WR - so the final position matches the last saved setting unless IVR was never programmed.

Does the ISL22316WFRT10Z support true 5V I²C communication?

Yes - the ISL22316WFRT10Z supports VCC up to 5.5V and specifies VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC for SDA/SCL/A0/A1/SHDN pins. With VCC = 5.5V, VIH min is 3.85V, making it compatible with standard 5V I²C masters without level shifters.

Can the ISL22316WFRT10Z be used in rheostat mode with RW and RL only?

Yes - the ISL22316WFRT10Z supports rheostat configuration by connecting RH to either RW or RL (typically RW to RL, leaving RH open). In this mode, resistance between RW and RL varies from ~0Ω to 10kΩ with ±1 MI integral non-linearity and ±1 MI differential non-linearity per datasheet specifications.

How does shutdown mode affect the wiper position and DCP terminals in the ISL22316WFRT10Z?

In shutdown mode (SHDN pin low or ACR SHDN bit = 0), the ISL22316WFRT10Z opens the RH–RL path and shorts RW to RL. The wiper position remains stored in the WR register and is restored immediately upon exit from shutdown - no recalibration is needed.

Is the 10kΩ resistance tolerance of the ISL22316WFRT10Z production-tested?

Yes - the ISL22316WFRT10Z specifies RH-to-RL resistance tolerance as ±20% (min/max), and this parameter is 100% tested at +25°C per datasheet Note 19. The ±20% applies to the 10kΩ option (W suffix), confirmed in the Ordering Information table.