ADR443BRZ-REEL7

Overview

The ADR443BRZ-REEL7 is a fixed 3.0 V series voltage reference from the XFET family, housed in an 8-lead SOIC package. It provides ±0.04% initial accuracy and a temperature coefficient of 3 ppm/°C across the −40°C to +125°C range. The device operates with a supply voltage between 3.5 V and 18 V, requiring only 500 mV of headroom. It features ultralow noise of 1.4 µV p-p (0.1 Hz to 10 Hz) and supports sourcing up to 10 mA and sinking up to 5 mA.

Feature Summary

• Utilizes XFET technology for exceptionally low noise performance compared to traditional buried Zener references.
• Features a dedicated trim terminal allowing output voltage adjustment over a 0.5% range without compromising stability.
• Operates with minimal supply voltage headroom of 500 mV, enabling efficient power usage in low-voltage systems.

Applications

• Precision data acquisition systems
• High resolution data converters
• Battery-powered instrumentation

Procurement Notes

Verify that the REEL7 suffix corresponds to tape-and-reel packaging rather than tube packaging when ordering. Confirm the B-grade electrical specifications match the required accuracy and drift parameters for the specific application environment before finalizing procurement.

Selection Notes

Select this component for applications demanding high precision and low noise within a standard surface-mount footprint. Ensure the input voltage remains above the minimum threshold of 3.5 V to maintain regulation. Consider the thermal resistance characteristics if operating near maximum load currents or elevated ambient temperatures.

Part Context

This part belongs to the ADR44x series of ultralow noise LDO XFET voltage references manufactured by Analog Devices Inc. The series includes variants with different fixed output voltages, all sharing similar low-noise architectures and package options designed for high-end signal conversion applications.

Replacement Considerations

ADR4530ARZ is listed as a similar alternative part number.

FAQ

How does the XFET technology improve noise performance?

XFET technology utilizes junction field effect transistors with extra channel implants, resulting in significantly lower noise generation compared to band gap or buried Zener references.

What is the function of the TRIM pin?

The TRIM pin allows users to adjust the output voltage over a 0.5% range using an external potentiometer to compensate for system errors.