Renesas ISL90462WIH627Z-TK

Overview

ISL90462WIH627Z-TK from Intersil is a volatile digitally controlled potentiometer (XDCP™) configured as a 10kΩ variable resistor with 32-tap resolution, 2-pin UP/DN interface, and ±35ppm/°C tempco, used for precision bias and gain adjustment in sensor signal conditioning circuits.

For engineers reviewing the ISL90462WIH627Z-TK datasheet, ISL90462WIH627Z-TK pinout, ISL90462WIH627Z-TK application, or ISL90462WIH627Z-TK equivalent, key selection criteria include its SOT-23-6 package, 2.7V–5.5V supply range, 25µA active current, wiper resistance ≤600Ω, and industrial temperature range (−40°C to +85°C).

Technical Context

The ISL90462WIH627Z-TK implements a 31-element resistor array with electronic wiper switching controlled by CS and U/D inputs; wiper position is stored in volatile memory and resets on power cycle. Its 2-pin serial interface eliminates clock and data lines required by I²C or SPI potentiometers.

It operates as a 2-terminal variable resistor or 3-terminal voltage divider depending on external connections; RH connects to reference voltage, RW serves as adjustable output, and GND anchors the low end. Wiper settling time is 1µs, supporting rapid parameter tuning in closed-loop systems.

Key Specifications

Pinout & Package

ISL90462WIH627Z-TK is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AB, pkg drawing P6.064), measuring 2.90mm × 1.60mm × 1.15mm, compatible with standard reflow profiles including Pb-free peak temperatures ≥260°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRJZ-10-R7 and MCP4017T-103I/OT, the ISL90462WIH627Z-TK offers superior temperature stability and lower wiper resistance for precision analog trimming, while retaining the simplicity of a 2-pin interface-ideal for space-constrained, thermally demanding sensor calibration tasks.

Availability

ISL90462WIH627Z-TK is available at Aetrix Electronics and suitable for LCD contrast control, laser diode biasing, pressure sensor offset trim, temperature sensor gain calibration, and industrial transducer adjustment requiring stable component supply and RoHS-compliant packaging.

Supply support for ISL90462WIH627Z-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

Intersil Corporation is a precision analog and power management semiconductor company, now part of Renesas Electronics, delivering high-reliability solutions for industrial, automotive, and infrastructure markets.

The ISL90462WIH627Z-TK belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in automated calibration, sensor compensation, and analog signal conditioning systems.

FAQ

What is the resistance tolerance of the ISL90462WIH627Z-TK?

The ISL90462WIH627Z-TK has an end-to-end resistance (RTOTAL) tolerance of ±20% for the W-version (10kΩ), as specified in the Potentiometer Specifications table on page 3 of FN8230 Rev 4.00. This tolerance applies across the full operating temperature range and is measured at 25°C with nominal VDD. The ISL90462WIH627Z-TK does not include factory trimming; system-level calibration compensates for this variation.

Does the ISL90462WIH627Z-TK retain wiper position after power cycling?

No, the ISL90462WIH627Z-TK uses volatile memory only; wiper position resets to default (mid-scale or last-latched value depending on internal state) upon power removal. It lacks EEPROM or flash storage. For nonvolatile retention, consider alternatives like the AD5170BRJZ-10-R7. The ISL90462WIH627Z-TK is intended for applications where recalibration at startup is acceptable or managed externally.

What is the maximum allowable voltage across RH and RW terminals of the ISL90462WIH627Z-TK?

The absolute maximum voltage across any two terminals-including RH and RW-is limited by the Absolute Maximum Ratings: voltage on RH or RW with respect to GND must remain within −1V to +7V. Since RH and RW share the same VDD/GND domain, their differential voltage must not exceed VDD (max 5.5V). Exceeding these limits risks permanent damage to the ISL90462WIH627Z-TK's internal switches and resistor array.

Can the ISL90462WIH627Z-TK be used in a 3-terminal voltage divider configuration?

Yes, the ISL90462WIH627Z-TK supports 3-terminal operation: connect RH to a reference voltage (e.g., VDD), GND to system ground, and use RW as the adjustable output node. The datasheet confirms this usage on page 5 ("RH and RW" section) and in the Equivalent Circuit diagram. In this mode, the ISL90462WIH627Z-TK functions as a programmable voltage divider with 32 discrete tap ratios.

What is the recommended PCB layout practice for minimizing noise coupling into the ISL90462WIH627Z-TK?

Place a 100nF ceramic decoupling capacitor between VDD and GND within 2mm of the ISL90462WIH627Z-TK pins. Route U/D and CS traces away from noisy digital signals and avoid parallel routing with clock lines. Keep RH, RW, and GND traces short and direct; use ground pour beneath the ISL90462WIH627Z-TK body to reduce parasitic capacitance. These practices maintain the ISL90462WIH627Z-TK's −120dBV noise floor in sensitive analog paths.