Renesas ISL22313WFU10Z-TK

Overview

ISL22313WFU10Z-TK from Renesas (formerly Intersil) is a single-channel, 256-tap digitally controlled potentiometer (XDCP™) with I²C interface, 10kΩ end-to-end resistance, dual supply operation (V_CC = +2.25V to +5.5V, V_– = –2.25V to –5.5V), and non-volatile wiper position storage. It functions as a precision programmable resistor or voltage divider in analog signal conditioning circuits.

For engineers reviewing the ISL22313WFU10Z-TK datasheet, ISL22313WFU10Z-TK pinout, ISL22313WFU10Z-TK application, or ISL22313WFU10Z-TK equivalent, key selection criteria include its bipolar DCP terminal voltage range (V_– to V_CC), ±150 ppm/°C end-to-end tempco, 70Ω typical wiper resistance, and support for up to four devices on one I²C bus via A0/A1 addressing.

Technical Context

The ISL22313WFU10Z-TK implements a monolithic CMOS resistor ladder with CMOS switch matrix, enabling precise 8-bit wiper positioning under I²C control. Its volatile Wiper Register (WR) controls real-time resistance division, while the non-volatile Initial Value Register (IVR) ensures power-up repeatability.

It supports both voltage divider mode (RH–RL–RW) and rheostat mode (RW–RL or RW–RH), with shutdown mode forcing RW to RL and opening RH–RL. The dual-supply architecture enables true bipolar analog signal handling across the full DCP terminal range.

Key Specifications

Pinout & Package

Package: 10-lead MSOP (M10.118), RoHS-compliant, Pb-free plus anneal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP45HV51-103E/MS, the ISL22313WFU10Z-TK uniquely provides native dual-supply operation enabling direct bipolar signal routing, making it the only option among the three suitable for precision analog circuits referenced to split supplies without external level-shifting components.

Availability

ISL22313WFU10Z-TK is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and bipolar op-amp gain setting requiring stable component supply across extended temperature and long product lifecycles.

Supply support for ISL22313WFU10Z-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

Renesas Electronics Corporation acquired Intersil in 2017 and maintains its precision analog portfolio, emphasizing high-reliability industrial and automotive-grade components.

The ISL22313WFU10Z-TK belongs to Renesas' XDCP™ digitally controlled potentiometer family, designed specifically for replacing mechanical trimmers in harsh-environment analog systems requiring non-volatile calibration, wide temperature operation, and bipolar signal compatibility.

FAQ

What is the total resistance and tolerance of the ISL22313WFU10Z-TK?

The ISL22313WFU10Z-TK has a nominal total resistance of 10kΩ with a tolerance of ±20% over temperature and unit variation. This value is fixed per the "W" option in the ordering code and is specified in the Analog Specifications table of the FN6421 datasheet. The 10kΩ resistance directly determines gain scaling and attenuation ratios in voltage divider or rheostat configurations using the ISL22313WFU10Z-TK.

Does the ISL22313WFU10Z-TK support true bipolar operation?

Yes, the ISL22313WFU10Z-TK supports true bipolar operation via separate V_CC (+2.25V to +5.5V) and V_– (–2.25V to –5.5V) supply pins. Its DCP terminals (RH, RW, RL) operate over the full range from V_– to V_CC, enabling direct connection to op-amps, ADCs, or DACs on split supplies without external level shifters-unlike unipolar DCPs that reference all analog pins to GND.

How does the non-volatile memory function in the ISL22313WFU10Z-TK?

The ISL22313WFU10Z-TK contains an 8-bit non-volatile Initial Value Register (IVR) that stores the default wiper position. At power-up, the device automatically loads this value into the volatile Wiper Register (WR), restoring the last calibrated setting. The IVR can be written via I²C and retains data for 50 years at ≤+55°C, supporting field calibration persistence across power cycles and device replacement in the ISL22313WFU10Z-TK.

What is the maximum I²C clock frequency supported by the ISL22313WFU10Z-TK?

The ISL22313WFU10Z-TK supports a maximum I²C clock frequency of 400kHz, compliant with standard-mode I²C specifications. This is confirmed in the Serial Interface Specs table (page 6 of FN6421), where f_SCL is specified as 400kHz. The timing parameters-including t_LOW, t_HIGH, t_SU:STA, and t_HD:STA-are validated for reliable operation at this rate, ensuring robust communication with common microcontroller I²C peripherals in the ISL22313WFU10Z-TK.

Can multiple ISL22313WFU10Z-TK devices share the same I²C bus?

Yes, up to four ISL22313WFU10Z-TK devices can share a single I²C bus using the A0 and A1 address pins. These pins configure the two least-significant bits of the 7-bit slave address (10100xx), allowing unique addressing without external hardware. The datasheet confirms this in the Device Address section (page 11) and Figure 16, making multi-channel calibration or trimming feasible with minimal GPIO overhead in systems using the ISL22313WFU10Z-TK.