Renesas X9400WV24-2.7

Overview

X9400WV24-2.7 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 64-tap resolution per channel, SPI serial interface, nonvolatile wiper position storage, and 2.7V to 5.5V system supply operation. It integrates four independent 10kΩ or 2.5kΩ end-to-end resistor arrays, each with ±1% absolute linearity, 40Ω typical wiper resistance at 5V, and <1µA standby current - used for precision analog trimming in programmable power supplies and sensor signal conditioning circuits.

For engineers reviewing the X9400WV24-2.7 datasheet, X9400WV24-2.7 pinout, X9400WV24-2.7 application, or X9400WV24-2.7 equivalent, this device supports SPI-based remote calibration, power-on recall of DR0-stored settings, hardware write protection via WP pin, and dual-supply analog operation (±5.5V on V+/V−), making it suitable for industrial control and embedded instrumentation where low-noise, nonvolatile adjustment is required.

Technical Context

The X9400WV24-2.7 implements four independent 63-segment resistor arrays with CMOS switch-controlled wipers, each driven by a volatile 6-bit Wiper Counter Register (WCR) and backed by four 6-bit nonvolatile Data Registers (DR0–DR3). Wiper position is updated via SPI instructions including direct WCR write, DR-to-WCR transfer, or real-time increment/decrement.

It operates with SPI clock up to 2MHz, supports device addressing via A0/A1 pins (up to 4 devices on bus), and features hardware write protection (WP), HOLD for serial pause, and power-up auto-recall from DR0. Analog section accepts V+ and V− rails from −5.5V to +5.5V, independent of 2.7V–5.5V VCC logic supply.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm width), 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 AD5204BRUZ10 and MCP42050-I/SL, the X9400WV24-2.7 uniquely supports independent ±5.5V analog rails, hardware write protection, and serial pause - critical for reliable operation in industrial instrumentation with bipolar signal chains and stringent EMC requirements.

Availability

X9400WV24-2.7 is available at Aetrix Electronics and suitable for programmable power supplies, sensor calibration systems, industrial PLC analog I/O modules, and audio channel balancing circuits requiring stable component supply and long-term calibration integrity.

Supply support for X9400WV24-2.7 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

Intersil Corporation is a precision analog and power management semiconductor provider, now part of Renesas Electronics, with expertise in high-reliability industrial and infrastructure solutions.

The X9400 family was designed for digitally programmable analog signal conditioning in harsh environments - emphasizing nonvolatile calibration retention, low-noise performance, and robust SPI control under wide temperature and supply ranges.

FAQ

What is the minimum VCC voltage required for reliable operation of the X9400WV24-2.7?

The X9400WV24-2.7 is specified for 2.7V to 5.5V VCC operation. At 2.7V, all SPI functions (read/write/transfer), wiper response timing (tWRL ≤10µs), and standby current (<1µA) remain within datasheet limits. Operation below 2.7V may result in undefined behavior or failure to execute nonvolatile writes.

Does the X9400WV24-2.7 support true bipolar analog signal handling?

Yes. The X9400WV24-2.7 accepts independent V+ and V− supplies ranging from −5.5V to +5.5V, enabling direct connection to bipolar op-amps, transducers, and ADCs. Its resistor arrays and wiper switches operate correctly across the full −5.5V to +5.5V analog range, regardless of VCC level.

How does the power-on recall function work in the X9400WV24-2.7?

Upon power-up, once VCC, V+, and V− all reach stable levels, the X9400WV24-2.7 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR). This occurs without host intervention and ensures repeatable analog output at system startup.

Can the X9400WV24-2.7 be used as a two-terminal variable resistor?

Yes. Each of the four potentiometers can be configured as a two-terminal variable resistor by connecting one end terminal (e.g., VLx) to the wiper (VWx) and using the other end (VHx) as the second terminal. This configuration maintains 64-step resolution and leverages the same nonvolatile storage and SPI control as the three-terminal mode.

What is the purpose of the HOLD pin on the X9400WV24-2.7?

The HOLD pin pauses an active SPI transaction without resetting the internal command state. When asserted LOW while SCK is LOW, it freezes clock and data flow; returning HOLD HIGH (with SCK still LOW) resumes communication from the exact point of interruption - useful for time-critical systems sharing the SPI bus with other peripherals.