Renesas ISL90727WIE627Z-T7A

Overview

ISL90727WIE627Z-T7A from Intersil is a volatile 128-tap digitally controlled potentiometer (XDCP™) with I²C interface, 10kΩ total resistance, ±20% tolerance, and 6-lead SC-70 package. It replaces mechanical potentiometers in precision analog adjustment circuits, delivering 45 ppm/°C typical tempco in rheostat mode and 15 ppm/°C in voltage divider mode for stable gain/offset control in sensor signal conditioning.

For engineers reviewing the ISL90727WIE627Z-T7A datasheet, ISL90727WIE627Z-T7A pinout, ISL90727WIE627Z-T7A application, or ISL90727WIE627Z-T7A equivalent, key selection criteria include I²C address (0x5C), wiper response time (500 ns), power-on midscale preset (0x40), standby current (500 nA), and compatibility with 2.7V–5.5V supply rails in space-constrained industrial and sensor systems.

Technical Context

The ISL90727WIE627Z-T7A implements a 127-element resistor array with CMOS wiper switches controlled by a 7-bit volatile wiper register. Its I²C slave interface operates at up to 400 kHz with open-drain SDA/SCL pins, supporting standard-mode timing including tLOW ≥1300 ns and tHIGH ≥600 ns.

It functions in two primary modes: voltage divider (RH–RW–RL) with ratiometric tempco of ±15 ppm/°C, and rheostat (RW–RL) with resistance tempco of ±45 ppm/°C. Power-on reset loads 0x40 into the wiper register, positioning RW at midscale between RH and RL (GND).

Key Specifications

Pinout & Package

ISL90727WIE627Z-T7A uses a Pb-free 6-lead SC-70 package (JEDEC MO203AB, pkg drawing P6.049), measuring 2.15 mm × 1.35 mm × 0.95 mm with 0.65 mm lead pitch. The compact footprint supports high-density PCB layouts in portable and sensor modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL90727WIE627Z-T7A, AD5170BRJZ-10-R7 adds non-volatility at the cost of higher standby current and SPI-only compatibility, while MCP4017T-103E/OT offers lower-cost I²C control but sacrifices resolution and temperature stability-making ISL90727WIE627Z-T7A optimal for high-accuracy, low-power, I²C-based analog tuning.

Availability

ISL90727WIE627Z-T7A is available at Aetrix Electronics and suitable for pressure sensor calibration, LCD contrast control, RF amplifier bias tuning, and optical sensor gain adjustment requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for ISL90727WIE627Z-T7A 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 power management, precision analog, and interface applications.

The ISL90727 series belongs to Intersil's XDCP™ digitally controlled potentiometer product line, engineered specifically for replacing mechanical pots in automated calibration, sensor signal conditioning, and programmable bias networks.

FAQ

What is the I²C address of the ISL90727WIE627Z-T7A?

The ISL90727WIE627Z-T7A has a fixed 7-bit I²C slave address of 0x5C (binary 0101110). This address is hardwired and cannot be changed. When used on a shared I²C bus, ensure no other device uses 0x5C to avoid communication conflicts. The ISL90727WIE627Z-T7A responds to this address during both read and write operations as specified in the FN8247 datasheet.

Does the ISL90727WIE627Z-T7A retain wiper position after power loss?

No, the ISL90727WIE627Z-T7A is a volatile digitally controlled potentiometer. Its 7-bit wiper register resets to 0x40 (midscale) on every power-up. It does not include EEPROM or non-volatile memory. If persistent wiper settings are required, an external controller must reprogram the wiper position after each power cycle. This volatility is intentional for applications requiring guaranteed safe startup states.

What is the maximum operating voltage for the DCP terminals of the ISL90727WIE627Z-T7A?

The DCP terminals (RH, RW, RL) of the ISL90727WIE627Z-T7A tolerate voltages from –0.3 V to V_CC, per Absolute Maximum Ratings. With V_CC = 5.5 V, the maximum allowable voltage at RH or RW relative to GND is +5.5 V. Exceeding this range risks latchup or permanent damage. The device is rated for 5 mW power dissipation per DCP segment, limiting usable voltage swing based on resistance value.

Can the ISL90727WIE627Z-T7A be used in rheostat mode only?

Yes, the ISL90727WIE627Z-T7A supports rheostat configuration by connecting RL to GND and using RH and RW as the two-terminal variable resistor. In this mode, resistance between RW and RL varies from near 0 Ω to 10 kΩ (for W-option), with ±45 ppm/°C typical tempco. The datasheet confirms monotonicity and INL/DNL specs apply in both rheostat and voltage divider modes, making it suitable for current-setting and gain-control applications.

What is the wiper response time of the ISL90727WIE627Z-T7A after an I²C write?

The wiper response time (t_DCP) of the ISL90727WIE627Z-T7A is 500 ns, measured from the SCL falling edge of the last bit of the DCP data byte to actual wiper movement. This fast settling enables real-time analog adjustments in closed-loop systems. The specification assumes proper I²C timing compliance (e.g., t_LOW ≥1300 ns) and stable V_CC; no additional software delay is needed after I²C ACK to guarantee valid wiper position.