Renesas ISL22424WFR16Z

Overview

ISL22424WFR16Z from Renesas Electronics (formerly Intersil) is a dual digitally controlled potentiometer (XDCP™) with SPI interface, 256-tap resolution, 10kΩ end-to-end resistance, and dual-supply operation (VCC = 2.25–5.5V, V− = −2.25 to −5.5V). It integrates non-volatile initial value registers (IVR), volatile wiper registers (WR), and 13 general-purpose EEPROM registers. Used in precision biasing and gain control for industrial sensor signal conditioning.

For engineers reviewing the ISL22424WFR16Z datasheet, ISL22424WFR16Z pinout, ISL22424WFR16Z application, or ISL22424WFR16Z equivalent, key selection criteria include bipolar voltage range support, ±85 ppm/°C end-to-end tempco (W-option), shutdown mode current <4 µA, wiper resistance ≤250 Ω, and 16-lead QFN package compatibility with high-density PCB layouts.

Technical Context

The ISL22424WFR16Z implements two independent resistor arrays using CMOS-switched ladder networks, each with make-before-break wiper switching. Wiper position is controlled via an 8-bit volatile register (WRi), loaded at power-up from corresponding non-volatile IVRi registers.

Its SPI interface operates in Mode 0 (CPOL = 0, CPHA = 0), supporting daisy-chain configuration and read/write access to all registers-including 13 GP EEPROM locations-using instruction-based protocol with addressable register map. Shutdown mode forces open-circuit DCP terminals and shorts RWi to RLi.

Key Specifications

Pinout & Package

ISL22424WFR16Z is housed in a 16-lead QFN (4 mm × 4 mm, L16.4x4A), thermally enhanced with exposed die pad internally connected to V−. PCB thermal land for EPAD should be connected to V− plane per TB389.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42010-I/P, the ISL22424WFR16Z uniquely supports true bipolar DCP terminal operation, dual-channel matching (±2 LSB), and integrated GP EEPROM-making it optimal for high-reliability, space-constrained industrial and medical systems requiring robust calibration persistence.

Availability

ISL22424WFR16Z is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, laser diode bias control, programmable filter tuning, and medical instrumentation calibration requiring stable component supply across extended temperature and long product lifecycles.

Supply support for ISL22424WFR16Z 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 is a global semiconductor leader delivering trusted embedded design innovation, with roots in Intersil's precision analog portfolio.

The ISL22424 series belongs to Renesas' XDCP™ digitally controlled potentiometer product line, designed specifically for replacing mechanical trimmers in high-reliability industrial, automotive, and medical systems where programmability, non-volatility, and temperature stability are critical.

FAQ

What is the package type and lead count for ISL22424WFR16Z?

The ISL22424WFR16Z uses a 16-lead QFN package (4 mm × 4 mm, L16.4x4A) with exposed die pad internally tied to V−. This compact, thermally efficient package supports high-density PCB layouts and is RoHS-compliant with Pb-free plus anneal construction.

Does ISL22424WFR16Z support true bipolar operation, and what are the voltage limits?

Yes, ISL22424WFR16Z supports true bipolar operation with independent VCC (2.25–5.5 V) and V− (−2.25 to −5.5 V) supplies. DCP terminals (RH/RL/RW) can operate between V− and VCC, enabling analog signal handling across ±5.5 V rails-critical for AC-coupled and dual-supply op-amp designs.

How does the non-volatile memory function in ISL22424WFR16Z, and what is its endurance?

The ISL22424WFR16Z includes non-volatile Initial Value Registers (IVR0/IVR1) and 13 General Purpose registers, all rated for 1,000,000 write cycles and 50 years of data retention at T ≤ +55°C. IVR contents load into volatile Wiper Registers (WR0/WR1) at power-up, ensuring repeatable startup behavior without host intervention.

What is the maximum SPI clock frequency supported by ISL22424WFR16Z?

The ISL22424WFR16Z supports SPI clock frequencies up to 5 MHz under recommended operating conditions. Timing parameters-including tSU (50 ns setup), tH (50 ns hold), and tCYC (200 ns cycle time)-are fully characterized for reliable communication at this rate with proper signal integrity.

Can ISL22424WFR16Z be used in daisy-chain configuration, and how is it implemented?

Yes, ISL22424WFR16Z supports daisy-chain SPI configuration. Multiple devices share SCK, CS, and SDI lines, with SDO of one device connected to SDI of the next. Each device responds only when its CS is asserted, enabling compact multi-channel digital pot control with minimal GPIO usage.