Renesas ISL22316WFRT10Z-TK

Overview

ISL22316WFRT10Z-TK from Renesas (formerly Intersil) is a single-channel digitally controlled potentiometer (XDCP™) with I²C interface, 128-tap resolution, non-volatile wiper position storage, and 10 kΩ end-to-end resistance in a 10-lead TDFN (3×3 mm) package. It operates from 2.7V to 5.5V, supports shutdown mode with ≤5 µA current, and delivers ±0.5 LSB DNL in voltage divider mode - used for precision gain/offset trimming in sensor signal conditioning circuits.

For engineers reviewing the ISL22316WFRT10Z-TK datasheet, ISL22316WFRT10Z-TK pinout, ISL22316WFRT10Z-TK application, or ISL22316WFRT10Z-TK equivalent, key selection considerations include I²C address configurability (A0/A1), wiper resistance (70 Ω typ.), ratiometric temperature coefficient (±4 ppm/°C), and guaranteed monotonicity across -40°C to +125°C.

Technical Context

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

It features dual control paths: hardware shutdown via active-low SHDN pin (logically ANDed with ACR[6]) and software-controlled shutdown via I²C. The device supports up to 400 kHz I²C clock frequency, tolerates 400 pF bus capacitance, and provides open-drain SDA/SCL with external pull-up requirements.

Key Specifications

Pinout & Package

ISL22316WFRT10Z-TK is housed in a Pb-free, RoHS-compliant 10-lead TDFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad. Pin numbering follows top-view orientation as defined in FN6186 Rev 3.00, Page 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP45HV51-103E/MS, ISL22316WFRT10Z-TK uniquely combines I²C address flexibility (A0/A1), hardware + software shutdown, guaranteed monotonicity, and non-volatile recall - making it optimal for embedded systems needing robust, self-initializing analog trimming without host intervention.

Availability

ISL22316WFRT10Z-TK is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifier design, and automotive cabin climate control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ISL22316WFRT10Z-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 Corporation (acquired Intersil in 2017) is a global semiconductor leader delivering high-performance analog, power management, and embedded processing solutions for industrial, automotive, and infrastructure markets.

The ISL22316 belongs to Renesas' XDCP™ (eXternally Digital Controlled Potentiometer) family, engineered for precision analog trimming in systems where mechanical potentiometers fail due to wear, vibration, or environmental stress.

FAQ

What is the total resistance and tolerance of the ISL22316WFRT10Z-TK?

The ISL22316WFRT10Z-TK has a nominal total resistance of 10 kΩ between RH and RL terminals, with a tolerance of ±20% across temperature and process variation. This value is fixed per the "W" option designation in the part number and is verified per FN6186 Rev 3.00, page 3, Analog Specifications table.

Does the ISL22316WFRT10Z-TK retain its wiper position after power cycling?

Yes - the ISL22316WFRT10Z-TK stores the wiper position in a non-volatile Initial Value Register (IVR) that retains data for 50 years at ≤+55°C. At power-up, the IVR contents are automatically loaded into the volatile Wiper Register (WR), restoring the last known tap position without host intervention.

What package type and dimensions does the ISL22316WFRT10Z-TK use?

The ISL22316WFRT10Z-TK uses a 10-lead TDFN package measuring 3 mm × 3 mm with 0.5 mm lead pitch and an exposed thermal pad. This package is documented as "10 Ld 3x3 TDFN" in the Ordering Information table (FN6186 Rev 3.00, page 1) and corresponds to package drawing L10.3x3B.

Can multiple ISL22316WFRT10Z-TK devices share the same I²C bus?

Yes - the ISL22316WFRT10Z-TK supports up to four devices on a single I²C bus using the A0 and A1 address pins. These pins set the two least significant bits of the 7-bit slave address, enabling unique addressing without external multiplexing or software arbitration.

What is the maximum allowable voltage on the DCP terminals (RH, RL, RW) of the ISL22316WFRT10Z-TK?

The absolute maximum voltage on any DCP terminal (RH, RL, RW) is limited to the range GND – 0.3V to VCC + 0.3V, as specified in the Absolute Maximum Ratings table (FN6186 Rev 3.00, page 3). Exceeding this range risks latch-up or permanent damage to the internal CMOS switches.