Renesas ISL22414WFU10Z-TK

Overview

ISL22414WFU10Z-TK from Renesas (formerly Intersil) is a single-channel, 256-tap digitally controlled potentiometer (XDCP™) with SPI interface, 10kΩ end-to-end resistance, dual supply support (V_CC = 2.25–5.5V, V₋ = −2.25 to −5.5V), and extended industrial temperature range (−40°C to +125°C). It operates as a three-terminal potentiometer or two-terminal rheostat in precision analog signal conditioning and bias control circuits.

For engineers reviewing the ISL22414WFU10Z-TK datasheet, ISL22414WFU10Z-TK pinout, ISL22414WFU10Z-TK application, or ISL22414WFU10Z-TK equivalent, key selection criteria include wiper position recall on power-up, non-volatile initial value register (IVR), 14 general-purpose NV registers, shutdown mode current <2.5µA, and ±150ppm/°C end-to-end tempco for the 10kΩ variant.

Technical Context

The ISL22414WFU10Z-TK implements a monolithic CMOS resistor ladder with CMOS switch matrix, enabling precise 8-bit wiper positioning via SPI Mode 0 (rising-edge input, falling-edge output). Its volatile Wiper Register (WR) controls real-time resistance division, while the non-volatile Initial Value Register (IVR) ensures deterministic power-on state restoration.

Dual-supply operation allows bipolar terminal voltage swing between V₋ and V_CC, supporting applications requiring negative reference rails. The device supports daisy-chain configuration for multi-potentiometer systems and includes an Access Control Register (ACR) for configuring SDO output type (push-pull or open-drain) and shutdown behavior.

Key Specifications

Pinout & Package

10-lead MSOP package (Pb-free, RoHS compliant; package drawing M10.118), thermally optimized for surface-mount assembly and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP41HV51-103E/MS, the ISL22414WFU10Z-TK uniquely supports true dual-supply operation with dedicated V₋ pin, enabling direct integration into split-rail analog signal chains without external level translation or supply derivation.

Availability

ISL22414WFU10Z-TK is available at Aetrix Electronics and suitable for precision analog trimming, sensor calibration, and programmable biasing applications requiring stable component supply across automotive under-hood, industrial motor control, and medical instrumentation designs.

Supply support for ISL22414WFU10Z-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, including digitally controlled potentiometers for high-reliability industrial and automotive applications.

The ISL22414 series was designed for systems requiring non-volatile, SPI-controlled resistance adjustment with bipolar supply support - targeting precision instrumentation, sensor signal conditioning, and programmable analog front-ends.

FAQ

What is the total resistance and tolerance of the ISL22414WFU10Z-TK?

The ISL22414WFU10Z-TK has a nominal total resistance of 10kΩ with a tolerance of ±20% over temperature. This value is specified for the "W" option in the ordering table and confirmed in the Analog Specifications section of the FN6424 datasheet. The resistance remains stable across the full −40°C to +125°C operating range with a temperature coefficient of ±150ppm/°C.

Does the ISL22414WFU10Z-TK retain its wiper position after power cycling?

Yes. The ISL22414WFU10Z-TK automatically recalls the contents of its non-volatile Initial Value Register (IVR) to the volatile Wiper Register (WR) at power-up. This ensures the wiper returns to a known, user-programmable position without host intervention - a key feature verified in the Power-up Recall section of the datasheet.

Can the ISL22414WFU10Z-TK operate with only a positive supply voltage?

No. The ISL22414WFU10Z-TK requires both V_CC (2.25–5.5V) and V₋ (−2.25 to −5.5V) supplies to function correctly. Its architecture relies on the dual-rail configuration to bias internal CMOS switches and enable bipolar terminal voltage swing. Omitting V₋ violates Absolute Maximum Ratings and will prevent proper operation.

How many non-volatile registers does the ISL22414WFU10Z-TK include beyond the IVR?

The ISL22414WFU10Z-TK includes 14 general-purpose non-volatile registers in addition to the 8-bit IVR. These registers (addresses 0x01–0x0E) can store calibration coefficients, lookup tables, or system configuration data. Their 1,000,000-cycle endurance and 50-year data retention at ≤+55°C are explicitly specified in the EEPROM Specification section of FN6424.

What is the maximum SPI clock frequency supported by the ISL22414WFU10Z-TK?

The ISL22414WFU10Z-TK supports a maximum SPI clock frequency of 5MHz, as stated in the Serial Interface Specifications table. Timing parameters including t_CYC (200ns), t_WH (100ns), and t_WL (100ns) are guaranteed at this rate. Operation above 5MHz violates timing specifications and may result in communication errors or register corruption.