AD5144TRUZ10-EP

Overview

The AD5144TRUZ10-EP is a quad-channel, nonvolatile digital potentiometer designed for defense and aerospace applications under the AQEC standard. It features 256 positions with an SPI interface and a 10 kΩ resistance option. The device operates within a military temperature range of −55°C to +125°C and supports single or dual supplies from 2.3 V to 5.5 V. Key electrical characteristics include a maximum resistor tolerance of ±8%, a typical temperature coefficient of 35 ppm/°C, and a bandwidth of 3 MHz at RAB = 10 kΩ. It provides up to ±6 mA continuous current per channel.

Feature Summary

• Military-grade reliability supporting defense and aerospace applications (AQEC standard).
• Quad-channel architecture with 256-position resolution and nonvolatile EEPROM memory.
• SPI serial interface with independent logic supply ranging from 1.8 V to 5.5 V.
• High bandwidth of 3 MHz and fast start-up time of less than 75 µs.

Applications

• Missiles and munitions systems.
• Avionics and unmanned aerial systems.
• Programmable filters, delays, and time constants.
• Programmable power supplies.

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format. The datasheet lists both tube (standard) and reel (suffix -R7) options for this part number. Confirm that the enhanced product baseline meets the specific qualification data requirements for the target defense or aerospace program before finalizing procurement.

Selection Notes

Select this component when military temperature operation (-55°C to +125°C) and controlled manufacturing baselines are mandatory. Ensure the system requires an SPI interface rather than I2C, as this specific model is SPI-only. Verify that the 10 kΩ nominal resistance and ±8% tolerance align with the circuit's precision requirements.

Part Context

This part belongs to the AD5144-EP Enhanced Product family, distinct from commercial variants by its adherence to AQEC standards. It shares the core functional block diagram with the standard AD5144 but guarantees a single assembly/test site and one fabrication site for traceability.

Replacement Considerations

Standard AD5144BRUZ10 models lack the military temperature range and controlled manufacturing baseline required for AQEC applications. Direct pin-compatible replacements must be verified against the specific environmental and reliability constraints of the original design.

FAQ

What is the guaranteed endurance of the EEPROM in this device?

The EEPROM endurance is qualified to 100,000 cycles measured between -40°C and +125°C, and 1 million cycles at 25°C.

Does the AD5144TRUZ10-EP support I2C communication?

No, this specific model utilizes a Serial Peripheral Interface (SPI) digital interface for setting wiper values and reading back registers.

What is the maximum continuous current allowed per terminal?

The maximum continuous current is ±6 mA at RAB = 10 kΩ for the Ax, Bx, and Wx pins.