ADR433BR

Overview

The ADR433BR is a precision XFET voltage reference from Analog Devices, providing a fixed 3.0 V output in an 8-lead SOIC package. It features B-grade initial accuracy of ±1.5 mV (±0.05%) and a maximum temperature coefficient of 3 ppm/°C over the -40°C to +125°C range. The device operates with a supply voltage between 5.0 V and 18 V, drawing a typical quiescent current of 800 µA. It supports high output source and sink currents up to +30 mA and -20 mA respectively, without requiring external capacitors for stability.

Feature Summary

• Utilizes patented XFET technology to minimize voltage change versus temperature nonlinearity.
• Capable of sourcing up to 30 mA and sinking up to 20 mA of load current.
• Includes a dedicated trim terminal allowing output voltage adjustment within a ±0.5% range.
• Operates with low supply current and requires minimal input-to-output voltage headroom.

Applications

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

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and reel specifications. Ensure the ordering code matches the required grade and packaging format. Confirm availability through authorized distributors as stock levels fluctuate. Cross-reference the manufacturer part number with the datasheet revision to ensure parameter consistency.

Selection Notes

Select this component when a stable 3.0 V reference is required with low drift and high current drive capability. The B-grade specification ensures tight initial accuracy suitable for high-performance applications. Consider the 8-lead SOIC package for surface-mount assembly requirements. Evaluate the 5.0 V minimum operating voltage constraint against the system power supply design.

Part Context

This device belongs to the ADR43x series of ultralow noise XFET voltage references. The family includes variants with different fixed output voltages such as 2.048 V, 2.500 V, 4.096 V, and 5.000 V. All members share similar architectural benefits including low noise performance and high accuracy across the extended industrial temperature range.

Replacement Considerations

ADR433ARZ