ADR431AR-REEL7

Overview

The ADR431AR-REEL7 is a series voltage reference from the ADR43x family, utilizing XFET technology to achieve ultralow noise and high accuracy. It provides a fixed output of 2.5 V with an initial accuracy of ±0.12% (A Grade) and a maximum temperature coefficient of 10 ppm/°C. The device operates within a supply voltage range of 4.5 V to 18 V and draws a quiescent current of 800 µA. It features a low-noise profile of 3.5 µV p-p in the 0.1 Hz to 10 Hz band and supports high output source and sink currents of +30 mA and −20 mA respectively.

Feature Summary

• Utilizes patented XFET technology for minimized thermal drift curvature correction and exceptionally low noise performance.
• Includes a dedicated trim terminal allowing output voltage adjustment over a 0.5% range without compromising stability.
• Capable of sourcing up to 30 mA and sinking up to 20 mA of load current while maintaining regulation.

Applications

• Precision data acquisition systems
• High resolution data converters
• Medical instruments
• Industrial process control systems

Procurement Notes

Verify that the specific ordering suffix matches the required package type and reel configuration. Confirm the grade designation corresponds to the necessary accuracy and temperature coefficient specifications for the design. Ensure compatibility with the intended operating voltage range and load requirements before finalizing procurement.

Selection Notes

Select this component when low noise and high precision are critical for analog signal conditioning. The ADR431 offers a fixed 2.5 V output suitable for driving ADCs or DACs. Consider the A Grade specifications for applications requiring tighter tolerance limits and lower temperature drift across the industrial range.

Part Context

This part belongs to the ADR43x series of ultralow noise XFET voltage references manufactured by Analog Devices. The series includes variants with different fixed output voltages such as 2.048 V, 3.0 V, and 4.096 V. All members share similar architectural benefits including low supply current and high drive capability.

Replacement Considerations

Substitutes include other parts from the ADR43x family like the ADR430 or ADR433 if voltage levels differ. Verify pinout compatibility between MSOP and SOIC packages if changing form factors. Ensure replacement devices meet the same noise and accuracy requirements.