Renesas ISL90727UIE627Z-TK

Overview

ISL90727UIE627Z-TK from Intersil is a volatile, single-channel, 128-tap digitally controlled potentiometer (XDCP™) with I²C interface, 50kΩ total resistance, ±20% tolerance, and SC-70-6 package. It operates from 2.7V to 5.5V, delivers wiper resistance of 85–200Ω at 3.3V, and targets precision analog trimming in sensor signal chains and RF bias networks.

For engineers reviewing the ISL90727UIE627Z-TK datasheet, ISL90727UIE627Z-TK pinout, ISL90727UIE627Z-TK application, or ISL90727UIE627Z-TK equivalent, key selection criteria include I²C address (0x5C), ratiometric tempco (±15 ppm/°C in divider mode), power-on midscale preset (0x40), 500nA standby current, and compatibility with 400kHz I²C bus timing.

Technical Context

The ISL90727UIE627Z-TK implements a 127-element resistor array with CMOS wiper switches controlled by a 7-bit volatile wiper register (WR), enabling monotonic 128-position adjustment between RH and RL terminals. Its I²C slave interface uses open-drain SDA/SCL pins compliant with standard-mode (400kHz) timing, including tLOW ≥1300ns and tHIGH ≥600ns.

It operates exclusively in volatile mode: wiper position resets to 0x40 (midscale) on power-up, with no non-volatile storage. DCP terminal voltage range (2.7V–5.5V), ±45 ppm/°C rheostat tempco, and 5mW per-terminal power rating define its safe analog operating envelope under DC or low-frequency AC conditions.

Key Specifications

Pinout & Package

ISL90727UIE627Z-TK is housed in a Pb-free 6-lead SC-70 package (JEDEC MO-203AB, Intersil P6.049), measuring 2.15mm × 1.35mm × 0.90mm (max height), with gull-wing leads and pin 1 marked by index area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRJZ-50-R7 and MCP4017T-503E/OT, the ISL90727UIE627Z-TK uniquely balances I²C compatibility, 128-tap resolution, ±15 ppm/°C ratiometric tempco, and midscale power-on default-making it optimal for industrial sensor calibration and RF bias where repeatability and thermal stability outweigh non-volatility needs.

Availability

ISL90727UIE627Z-TK is available at Aetrix Electronics and suitable for pressure sensor calibration, RF amplifier biasing, LCD contrast control, and optical sensor gain scaling requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for ISL90727UIE627Z-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, with expertise in power management, precision analog, and interface solutions for industrial, automotive, and communications markets.

The ISL90727UIE627Z-TK belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered specifically for replacing mechanical trimmers in precision analog signal conditioning, sensor calibration, and programmable bias networks.

FAQ

What is the I²C address of the ISL90727UIE627Z-TK and how does it differ from ISL90728?

The ISL90727UIE627Z-TK uses a fixed 7-bit I²C slave address of 0x5C (binary 0101110x). This differs from the ISL90728, which uses 0x7C (0111110x). The distinct addresses allow both devices to coexist on the same I²C bus without conflict, enabling dual-potentiometer systems with independent control. The ISL90727UIE627Z-TK's address is hardwired and not configurable via pins or registers.

Does the ISL90727UIE627Z-TK retain its wiper position after power cycling?

No, the ISL90727UIE627Z-TK is a volatile digital potentiometer: its 7-bit wiper register resets to 0x40 (midscale) each time VDD rises above the power-on reset threshold. It contains no EEPROM or flash memory. This behavior ensures predictable startup conditions but requires the host MCU to reprogram the wiper position post-power-up if a specific setting is needed for system initialization.

What is the maximum allowable voltage across the RH–RL terminals of the ISL90727UIE627Z-TK?

The absolute maximum voltage across RH–RL is limited by the device's DCP pin rating: voltage at any DCP pin (RH, RW, RL) must remain between -0.3V and VCC. Since RL is internally tied to GND, the maximum RH–RL voltage equals VCC, which itself is rated from -0.3V to +7V. However, the recommended operating condition restricts VCC to 2.7V–5.5V, and power dissipation must stay ≤5mW per terminal-so RH–RL voltage should not exceed √(5mW × 50kΩ) ≈ 15.8V, though practical use stays within VCC.

Can the ISL90727UIE627Z-TK be used in rheostat mode with only two terminals?

Yes, the ISL90727UIE627Z-TK supports rheostat configuration using RH and RW (or RW and RL), leaving the third terminal unconnected. In this mode, resistance between RH and RW varies from ~70Ω (wiper at RH) to 50kΩ (wiper at RL), with ±45 ppm/°C typical temperature coefficient. The wiper resistance (85–200Ω at 3.3V) contributes directly to total measured resistance and must be included in circuit calculations.

What is the wiper resistance specification for the ISL90727UIE627Z-TK and why does it matter?

The ISL90727UIE627Z-TK specifies wiper resistance (RW) as 85Ω (min) to 200Ω (max) at VCC = 3.3V and TA = +25°C. This on-resistance adds directly to the effective resistance between RW and either RH or RL, impacting accuracy in precision divider or rheostat applications. For example, at midscale in a 50kΩ divider, RW contributes up to 200Ω error-less than 0.4% of RTOTAL-but becomes significant in sub-1kΩ gain-setting networks.