ADR433ARMZ-REEL7

Overview

The ADR433ARMZ-REEL7 is a precision voltage reference from the ADR43x XFET series, manufactured by Analog Devices. It provides a nominal output voltage of 3.0 V with an initial accuracy of ±4 mV (A Grade) or ±1.5 mV (B Grade). The device features a maximum temperature coefficient of 10 ppm/°C for A Grade and 3 ppm/°C for B Grade. It operates within a supply voltage range of 5.0 V to 18 V, requiring a minimum headroom of 2 V. Quiescent current is typically 800 µA across the operating temperature range of -40°C to +125°C. The component supports sourcing up to 30 mA and sinking up to -20 mA of output current.

Feature Summary

• Utilizes XFET technology with temperature drift curvature correction to minimize voltage change versus temperature nonlinearity.
• Capable of sourcing up to 30 mA and sinking up to -20 mA of output current without external components.
• Includes a trim terminal allowing output voltage adjustment over a ±0.5% range while maintaining performance specifications.

Applications

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

Procurement Notes

Verify the specific grade (A or B) required for your application, as initial accuracy and temperature coefficient specifications differ between grades. Confirm that the MSOP-8 package variant matches your PCB footprint requirements. Ensure the input voltage supply remains within the 5.0 V to 18 V operational range to maintain specified regulation parameters.

Selection Notes

Select this component when low noise and high accuracy are critical in 5 V system environments. The XFET architecture offers lower supply current and reduced voltage headroom requirements compared to traditional buried Zener references. Consider the trim pin functionality if precise voltage calibration is needed post-manufacturing.

Part Context

This part belongs to the ADR430/ADR431/ADR433/ADR434/ADR435 family of ultralow noise XFET voltage references. The 'ARMZ' suffix indicates the 8-lead MSOP package, while 'REEL7' denotes tape and reel packaging. The ADR433 specifically targets applications requiring a 3.0 V reference output.

Replacement Considerations

The ADR433ARZ-REEL7 serves as a direct functional substitute with identical electrical characteristics but utilizes an 8-lead SOIC package instead of MSOP.