Renesas ISL90727WIE627Z-TK

Overview

ISL90727WIE627Z-TK from Intersil is a volatile 10kΩ digitally controlled potentiometer (XDCP™) with I²C interface, 128-tap resolution, ±45 ppm/°C typical resistance tempco in rheostat mode, and 6-lead SC-70 package - used for precision gain control and sensor offset adjustment in industrial analog signal chains.

For engineers reviewing the ISL90727WIE627Z-TK datasheet, ISL90727WIE627Z-TK pinout, ISL90727WIE627Z-TK application, or ISL90727WIE627Z-TK equivalent, key selection criteria include I²C address (0x5C), wiper resistance (85–200 Ω at VCC = 3.3V), power-on midscale preset (0x40), and DCP terminal voltage range (2.7V to 5.5V).

Technical Context

The ISL90727WIE627Z-TK implements a 127-element resistor array with CMOS wiper switches controlled by a 7-bit volatile wiper register (WR), where WR = 0x00 places RW nearest RL and WR = 0x7F places RW nearest RH. It operates exclusively as an I²C slave device with open-drain SDA/SCL pins and no internal pull-ups.

Its architecture supports both rheostat (RW–RL or RW–RH) and voltage-divider (RH–RL with RW tap) configurations. The wiper position updates within 500 ns after the final SCL falling edge of a write command, and power-up resets WR to 0x40 with a 3 ms delay before I²C interface enters standby.

Key Specifications

Pinout & Package

Package: 6-lead SC-70 (Pb-free, RoHS compliant), dimensions per JEDEC MO203AB and EIAJ SC70 standards (D = 1.85–2.15 mm, E = 1.80–2.40 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL90727WIE627Z-TK, AD5170BRJZ-10-R7 adds non-volatility at the cost of slower write cycles and EEPROM wear-out concerns, while MCP4017T-103I/OT offers pin-compatible I²C operation but sacrifices resolution and deterministic power-on behavior.

Availability

ISL90727WIE627Z-TK is available at Aetrix Electronics and suitable for RF amplifier biasing, LCD brightness control, sensor offset calibration, and transducer signal conditioning requiring stable component supply across industrial temperature ranges.

Supply support for ISL90727WIE627Z-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 (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for industrial, communications, and computing applications.

The ISL90727 series belongs to Intersil's XDCP™ digitally controlled potentiometer product line, engineered for replacing mechanical trimpots in precision analog trimming, calibration, and programmable gain applications.

FAQ

What is the I²C address of the ISL90727WIE627Z-TK?

The ISL90727WIE627Z-TK uses a fixed 7-bit I²C slave address of 0x5C. This distinguishes it from the ISL90728 variant (0x7C), allowing both devices to coexist on the same I²C bus. The address is hardwired and not configurable via pins or registers. Communication follows standard I²C protocol with START/STOP conditions and ACK handshaking as defined in the FN8247 datasheet.

Does the ISL90727WIE627Z-TK retain its wiper position after power cycling?

No, the ISL90727WIE627Z-TK is a volatile digitally controlled potentiometer. Its 7-bit wiper register resets to 0x40 (midscale) on every power-up. It does not include non-volatile memory. If persistent wiper position is required, an external microcontroller must reprogram the register after each power cycle, or a non-volatile alternative like the AD5170 should be considered.

What is the maximum allowable voltage across the DCP terminals of the ISL90727WIE627Z-TK?

The absolute maximum voltage between any DCP terminal (RH, RW, RL) and GND is specified as -0.3 V to VCC. Since RL is internally tied to GND, the maximum voltage across RH–RL or RW–RL is limited to VCC (≤5.5 V). Exceeding this risks damage; the device is rated for 5 mW total DCP power dissipation, limiting usable voltage based on RTOTAL and wiper position.

Can the ISL90727WIE627Z-TK be used in rheostat mode with only two terminals?

Yes, the ISL90727WIE627Z-TK supports rheostat configuration using RW and either RH or RL (RL is internally connected to GND). In RW–RL mode, resistance varies from ~85 Ω to 10 kΩ; in RW–RH mode, it varies from ~85 Ω to 10 kΩ minus wiper-to-RL resistance. The datasheet confirms monotonic behavior and specifies wiper resistance (85–200 Ω) and tempco (±45 ppm/°C) explicitly for rheostat use.

What is the wiper resistance specification for the ISL90727WIE627Z-TK at 5 V supply?

The datasheet specifies wiper resistance (RW) as 85–200 Ω at VCC = 3.3 V and TA = +25°C. While not explicitly tested at 5 V, the parameter is process- and geometry-dependent rather than supply-voltage-dependent. Therefore, the ISL90727WIE627Z-TK wiper resistance remains within the same 85–200 Ω range at 5 V, consistent with typical CMOS switch R_ON behavior across the 2.7–5.5 V operating range.