ADR433BRZ

Overview

The ADR433BRZ is a precision XFET voltage reference providing a fixed 3.0 V output in an 8-lead SOIC package. It operates within a supply voltage range of 5.0 V to 18 V with a minimum headroom of 2 V. The device features a maximum initial accuracy of ±0.05% and a temperature coefficient of 3 ppm/°C across the −40°C to +125°C industrial range. Quiescent current is typically 800 µA, while it supports sourcing up to 30 mA and sinking up to −20 mA.

Feature Summary

• Utilizes XFET technology for low noise and high stability
• Capable of sourcing and sinking significant load currents
• Includes a dedicated trim terminal for voltage adjustment
• Requires no external compensation capacitor

Applications

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

Procurement Notes

Verify the specific suffix 'BRZ' corresponds to the 8-lead narrow SOIC package and RoHS compliance status as defined by Analog Devices. Confirm that the B-grade specification aligns with the required ±0.05% initial accuracy and 3 ppm/°C temperature coefficient for your design constraints.

Selection Notes

Select this component when a stable 3.0 V reference is needed with low noise performance and high drive capability. Ensure the input voltage allows for at least 2 V of headroom above the output. Consider the trim pin if fine-tuning the output voltage within the specified range is necessary without degrading performance.

Part Context

This part belongs to the ADR43x series of ultralow noise XFET voltage references from Analog Devices. The family includes variants with different fixed output voltages (2.048 V to 5.000 V) and grades (A and B). The ADR433 specifically targets applications requiring a 3.0 V reference with extended industrial temperature coverage.

Replacement Considerations

Other members of the ADR43x family may serve as alternatives if different output voltages are acceptable. Verify package compatibility and electrical specifications against the original requirements before substitution.

FAQ

What is the purpose of the COMP pin?

The COMP pin is used to connect a series resistor and capacitor network to the VOUT pin to reduce overall noise.

Can the output voltage be adjusted?

Yes, the TRIM pin allows for adjusting the output voltage over a ±5% range without compromising performance.