ADR431ARMZ-REEL7

Overview

The ADR431ARMZ-REEL7 is a precision series voltage reference from the XFET family, manufactured by Analog Devices Inc. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.12% (A Grade). The device operates within a supply voltage range of 4.5 V to 18 V and features a maximum temperature coefficient of 10 ppm/°C over the extended industrial temperature range of -40°C to +125°C. It draws a typical quiescent current of 800 µA and supports high output source and sink currents of 30 mA and -20 mA respectively. The component is housed in an 8-lead MSOP package.

Feature Summary

• Utilizes XFET technology for ultralow noise performance without requiring external capacitors
• Features a dedicated trim terminal allowing output voltage adjustment over a ±0.5% range
• Provides bidirectional current capability with high output source and sink capacity

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 the datasheet distinguishes between A Grade (10 ppm/°C) and B Grade (3 ppm/°C) specifications. Confirm that the MSOP-8 package matches your PCB footprint requirements. Ensure the input voltage supplied to the circuit remains within the 4.5 V to 18 V operating range to maintain specified regulation and stability characteristics.

Selection Notes

Select this component when low noise and high accuracy are critical for signal integrity in measurement applications. The XFET architecture offers superior noise performance compared to standard bandgap references while maintaining lower power consumption than buried Zener types. Consider the trim pin functionality if precise voltage calibration is needed to compensate for system-level tolerances or drift over time.

Part Context

This part belongs to the ADR430/ADR431/ADR433/ADR434/ADR435 series of XFET voltage references. These devices share common architectural features including low quiescent current and high drive capability. The ADR431 specifically targets applications requiring a 2.5 V reference, distinguishing it from other members of the family that offer different nominal output voltages such as 2.048 V or 5.000 V.

Replacement Considerations

Direct substitutes within the same package and voltage include the ADR431ARZ (SOIC-8 package) or ADR431BRZ-REEL7 (SOIC-8 package). Verify compatibility regarding package dimensions and thermal resistance when transitioning between MSOP and SOIC form factors.