Renesas ISL22313WFU10Z

Overview

ISL22313WFU10Z from Renesas (formerly Intersil) is a single-channel, 256-tap digitally controlled potentiometer (XDCP™) with I²C interface, 10kΩ end-to-end resistance, dual supply support (V_CC = +2.25V to +5.5V, V_– = –2.25V to –5.5V), and non-volatile wiper position storage. It operates across –40°C to +125°C and is used for precision analog trimming in bipolar signal conditioning circuits.

For engineers reviewing the ISL22313WFU10Z datasheet, ISL22313WFU10Z pinout, ISL22313WFU10Z application, or ISL22313WFU10Z equivalent, key selection criteria include its 10kΩ resistance option, ±150 ppm/°C end-to-end tempco, 70Ω typical wiper resistance, I²C address flexibility (A0/A1), and shutdown mode with <2.5µA standby current.

Technical Context

The ISL22313WFU10Z implements a resistor ladder with CMOS switches in a monolithic CMOS process, supporting both voltage divider and rheostat configurations. Its volatile Wiper Register (WR) controls real-time tap position, while the non-volatile Initial Value Register (IVR) ensures power-up repeatability.

It features true dual-supply operation enabling DCP terminal voltages spanning V_– to V_CC, making it suitable for bipolar op-amp gain/offset adjustment. The I²C interface supports up to 400kHz clock rate, two address pins (A0/A1), and includes 14 general-purpose non-volatile registers for lookup table storage.

Key Specifications

Pinout & Package

ISL22313WFU10Z uses a 10-lead MSOP package (M10.118), RoHS-compliant with Pb-free plus anneal finish. Pin layout supports compact PCB placement and standard reflow profiles.

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, ISL22313WFU10Z uniquely supports true dual-supply DCP operation (V_– to V_CC), enabling direct use in bipolar op-amp topologies without external level shifters or rail splitters-critical for precision instrumentation and audio.

Availability

ISL22313WFU10Z is available at Aetrix Electronics and suitable for industrial sensor calibration, motor drive current sensing, and bipolar power supply trim requiring stable component supply across extended temperature and voltage ranges.

Supply support for ISL22313WFU10Z 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 acquired Intersil in 2017 and maintains its high-performance analog portfolio, emphasizing precision, reliability, and automotive/industrial qualification.

The ISL22313 series was designed specifically for digitally programmable analog trimming in harsh environments-targeting applications demanding non-volatile storage, wide temperature operation, and bipolar signal compatibility.

FAQ

What is the total resistance value of the ISL22313WFU10Z?

The ISL22313WFU10Z has a nominal end-to-end resistance of 10kΩ between RH and RL pins. This value is specified with ±20% tolerance and exhibits ±150 ppm/°C temperature coefficient over –40°C to +125°C, making it suitable for precision gain-setting and offset trimming where stable resistance is critical. The 10kΩ option is confirmed in the Ordering Information table of FN6421 Rev 1.00.

Does the ISL22313WFU10Z support bipolar operation?

Yes, the ISL22313WFU10Z supports true bipolar operation via independent V_CC (+2.25V to +5.5V) and V_– (–2.25V to –5.5V) supplies. This allows DCP terminals (RH, RW, RL) to operate across the full V_– to V_CC range, enabling direct integration into bipolar op-amp circuits without level-shifting components. This capability is explicitly stated in the datasheet's "Features" and "Recommended Operating Conditions" sections.

How does non-volatile wiper storage work in the ISL22313WFU10Z?

The ISL22313WFU10Z stores wiper position in a non-volatile Initial Value Register (IVR). At power-up, the IVR contents are automatically loaded into the volatile Wiper Register (WR), restoring the last-saved tap position. The IVR can be written via I²C and retains data for 50 years at ≤+55°C. This behavior is documented in the "Principles of Operation" and "Memory Description" sections of FN6421 Rev 1.00.

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

The ISL22313WFU10Z supports I²C standard-mode operation up to 400kHz, as specified in the "SERIAL INTERFACE SPECS" table of FN6421 Rev 1.00. Timing parameters including t_LOW, t_HIGH, t_SU:STA, and t_BUF are fully characterized for this speed. No higher-speed (fast-mode plus) support is indicated in the datasheet.

Can multiple ISL22313WFU10Z devices share the same I²C bus?

Yes, up to four ISL22313WFU10Z devices can share one I²C bus using the A0 and A1 address pins. These pins set the two least-significant bits of the 7-bit slave address (10100xxR/W), allowing unique addressing without external hardware modification. This configuration is detailed in Table 3 ("IDENTIFICATION BYTE FORMAT") and the "Device Address (A1, A0)" section of FN6421 Rev 1.00.