Renesas ISL90841WIV1427Z

Overview

ISL90841WIV1427Z from Renesas Electronics (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) IC with I²C interface, 10kΩ total resistance per channel, 256-tap resolution, and 14-lead TSSOP package. It operates from 2.7V to 5.5V, delivers <5µA standby current, and functions as voltage dividers or rheostats in precision analog control circuits.

For engineers reviewing the ISL90841WIV1427Z datasheet, ISL90841WIV1427Z pinout, ISL90841WIV1427Z application, or ISL90841WIV1427Z equivalent, key selection criteria include wiper resistance (70Ω typ), DCP-to-DCP matching (±2 LSB), ratiometric tempco (±4 ppm/°C), and I²C timing compliance at 400kHz.

Technical Context

The ISL90841WIV1427Z integrates four independent CMOS-switched resistor arrays, each with an 8-bit volatile wiper register (WR) directly accessible via I²C. All RH terminals connect internally to user-supplied VCC, while all RW terminals serve as adjustable outputs referenced to GND.

Its I²C slave interface uses A0/A1 pins to configure one of four device addresses (00h–03h), enabling up to four devices on the same bus. Power-up resets all WRs to 80h (mid-scale), and wiper response time is 1µs after SCL falling edge.

Key Specifications

Pinout & Package

ISL90841WIV1427Z is housed in a RoHS-compliant, Pb-free 14-lead TSSOP (Package Code V14) with 0.65mm pitch and 4.4mm × 5.0mm body size.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP4017T-103E/MS, the ISL90841WIV1427Z delivers tighter RTOTAL tolerance (±20%), lower wiper resistance (70Ω vs. ≥110Ω), and guaranteed DCP-to-DCP matching (±2 LSB), making it optimal for multi-channel precision analog signal conditioning where channel-to-channel consistency is critical.

Availability

ISL90841WIV1427Z is available at Aetrix Electronics and suitable for industrial sensor interfaces, audio equipment calibration, programmable filter design, and multi-channel data acquisition systems requiring stable component supply and long-term obsolescence management.

Supply support for ISL90841WIV1427Z 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 and continues to manufacture and support its precision analog portfolio, including XDCP™ technology.

The ISL90841WIV1427Z belongs to Renesas' digitally controlled potentiometer product line, designed specifically for replacing mechanical trimmers in automated test equipment, factory-calibrated instruments, and reconfigurable analog signal paths.

FAQ

What is the total resistance value specified for ISL90841WIV1427Z?

The ISL90841WIV1427Z is configured for 10kΩ total resistance per digitally controlled potentiometer (DCP), as indicated by the "W" in the part number suffix and confirmed in the Ordering Information table of FN8094 Rev 1.00. This value applies to the RH-to-GND resistance for each of the four independent DCP channels and is guaranteed within ±20% tolerance across temperature.

Does ISL90841WIV1427Z support I²C standard-mode or fast-mode operation?

The ISL90841WIV1427Z supports I²C standard-mode operation up to 400kHz, as specified in the Serial Interface Specs table on page 4 of FN8094 Rev 1.00. It does not support fast-mode (1MHz) or high-speed mode. The SCL timing parameters-including tLOW (1300ns min), tHIGH (600ns min), and fSCL (400kHz max)-are validated for reliable communication at this rate under recommended operating conditions.

How is the I²C device address set for ISL90841WIV1427Z?

The I²C device address for ISL90841WIV1427Z is determined by the logic states applied to pins A0 and A1, which form the two least-significant bits of a 7-bit slave address. With both A0 and A1 grounded, the base address becomes 0x50 (0101000b); other combinations yield 0x51, 0x52, or 0x53. The full Identification Byte includes these bits plus the fixed prefix 01010 and R/W bit, as detailed in Table 1 of FN8094 Rev 1.00.

What happens to the wiper positions of ISL90841WIV1427Z at power-up?

At power-up, all four wiper registers (WR0–WR3) in the ISL90841WIV1427Z are automatically reset to 0x80 (128 decimal), positioning each wiper at mid-scale-i.e., approximately 50% of full resistance between RH and GND. This behavior is explicitly stated in the Principles of Operation section (page 9) and ensures predictable, repeatable startup conditions without requiring initialization firmware.

Can ISL90841WIV1427Z be used in rheostat mode, and what are the limitations?

Yes, the ISL90841WIV1427Z supports rheostat mode by connecting RH to the signal path and using RW as the variable terminal, with GND serving as the common reference. Per the Analog Specifications table (page 3), this mode maintains ±0.5 LSB DNL and ±1 MI INL. However, maximum wiper current is limited to ±3.0mA and power dissipation per DCP must not exceed 5mW to avoid thermal drift or damage.