Renesas ISL22414TFU10Z

Overview

ISL22414TFU10Z from Renesas (formerly Intersil) is a single-channel, 256-tap digitally controlled potentiometer (XDCP™) with SPI interface, 100kΩ end-to-end resistance, dual supply operation (VCC = 2.25–5.5V, V− = −2.25 to −5.5V), and non-volatile wiper position storage. It operates across −40°C to +125°C and is used in precision analog trimming, programmable gain control, and bipolar signal conditioning circuits.

For engineers reviewing the ISL22414TFU10Z datasheet, ISL22414TFU10Z pinout, ISL22414TFU10Z application, or ISL22414TFU10Z equivalent, key selection criteria include its 100kΩ resistance option, MSOP-10 package, shutdown mode (<2.5µA), ±50 ppm/°C end-to-end tempco, and verified SPI Mode 0 compatibility with daisy-chain capability.

Technical Context

The ISL22414TFU10Z implements a monolithic CMOS resistor ladder with CMOS switch matrix controlled by an 8-bit volatile Wiper Register (WR), recalled at power-up from a non-volatile Initial Value Register (IVR). Its dual-supply architecture enables true bipolar terminal voltage swing between V− and VCC, supporting applications requiring negative rail referencing.

It features 14 general-purpose non-volatile registers for lookup table storage, SPI Mode 0 timing (5MHz max SCK), make-before-break wiper switching, and internal non-volatile write cycle time of 12–20ms. The device supports both voltage divider and rheostat configurations with monotonicity guaranteed over all 256 taps.

Key Specifications

Pinout & Package

ISL22414TFU10Z is housed in a Pb-free, RoHS-compliant 10-lead MSOP (M10.118) package with exposed pad (not electrically connected). Thermal resistance θ_JA = 132°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ10 and MCP45HV51-103E/MS, ISL22414TFU10Z uniquely delivers 100kΩ resistance, dual-supply operation, 14 GP registers, and guaranteed power-up recall-making it optimal for precision, bipolar, field-calibratable analog systems.

Availability

ISL22414TFU10Z is available at Aetrix Electronics and suitable for programmable gain amplifiers, DC bias adjustment circuits, and bipolar signal conditioning systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for ISL22414TFU10Z 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 full technical and manufacturing continuity for legacy Intersil precision analog products.

The ISL22414TFU10Z belongs to the XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in high-reliability, programmable analog signal-path applications.

FAQ

What is the resistance tolerance and temperature coefficient of ISL22414TFU10Z?

The ISL22414TFU10Z has a total resistance tolerance of ±20% and an end-to-end temperature coefficient of ±50 ppm/°C over −40°C to +125°C. These values are specified for the T-option (100kΩ) variant and ensure predictable drift in calibration-sensitive applications such as sensor signal conditioning and reference trimming where long-term stability is required.

Does ISL22414TFU10Z support daisy-chaining with other ISL22414 devices?

Yes, ISL22414TFU10Z supports daisy-chain configuration via its SPI interface: connect SDO of one device to SDI of the next while sharing CS and SCK lines. This allows simultaneous wiper updates across multiple units using a single microcontroller SPI port, reducing GPIO usage and simplifying firmware for multi-channel trimming systems.

How does the power-up recall function work in ISL22414TFU10Z?

At power-up, ISL22414TFU10Z automatically loads the contents of its non-volatile Initial Value Register (IVR) into the volatile Wiper Register (WR), positioning the wiper to the last stored value. This occurs after VCC exceeds 1.9V and completes within 5ms, ensuring consistent startup behavior without host intervention-critical for fail-safe analog subsystems.

Can ISL22414TFU10Z operate with unipolar supplies only?

Yes, ISL22414TFU10Z can operate with unipolar supplies (e.g., VCC = 3.3V, V− = GND), though this disables bipolar terminal voltage capability. In such cases, RL must be tied to GND, RH to VCC, and RW used as the adjustable tap. Full specification compliance-including wiper resistance and tempco-remains valid under unipolar conditions per datasheet test conditions.

What is the maximum SPI clock frequency supported by ISL22414TFU10Z?

The ISL22414TFU10Z supports SPI clock frequencies up to 5MHz, with minimum clock cycle time of 200ns and setup/hold times of 50ns each. This allows fast wiper updates (≤1.5µs response time) and efficient bulk register access-enabling real-time gain adjustment in closed-loop control systems without introducing latency bottlenecks.