ADR441BRZ

Overview

The ADR441BRZ is a precision voltage reference from the XFET family, providing a fixed 2.500 V output with B-grade accuracy of ±1 mV (±0.04%) and a temperature coefficient of 3 ppm/°C over the -40°C to +125°C range. It features ultralow noise of 1.2 µV p-p (0.1 Hz to 10 Hz) and operates with a low dropout headroom of 500 mV across an input voltage range of 3 V to 18 V. The device sources up to 10 mA and sinks up to -5 mA, drawing a typical quiescent current of 3.75 mA.

Feature Summary

• Utilizes XFET technology for exceptionally low noise and minimal thermal hysteresis compared to traditional bandgap references.
• Offers high initial accuracy and low temperature drift through curvature correction techniques.
• Capable of sourcing and sinking significant load currents while maintaining stability with only 500 mV supply headroom.

Applications

• Precision data acquisition systems
• High resolution data converters
• Battery-powered instrumentation
• Portable medical instruments
• Industrial process control systems

Procurement Notes

Verify the specific suffix 'BRZ' corresponds to the 8-lead narrow SOIC package and B-grade electrical specifications. Confirm that the TRIM pin functionality aligns with design requirements for output adjustment. Ensure input and output decoupling capacitors are selected according to datasheet recommendations for optimal stability and ripple rejection performance.

Selection Notes

Select this component when ultralow noise and high precision are critical for signal integrity in measurement applications. The B-grade specification ensures tighter tolerance limits suitable for high-end data conversion. Consider the low dropout characteristic for battery-operated designs where minimizing supply voltage overhead is necessary to extend operational life.

Part Context

This part belongs to the ADR440/ADR441/ADR443/ADR444/ADR445 series of XFET voltage references. These devices share common architectural features including low noise generation and trim capabilities but differ in fixed output voltages ranging from 2.048 V to 5.000 V. The ADR441 specifically provides the 2.500 V level commonly used in analog circuits.

Replacement Considerations

Direct functional substitutes within the same series include the ADR440, ADR443, ADR444, and ADR445, provided their respective fixed output voltages match the system requirements. Other grades such as ADR441ARZ offer similar packaging but different accuracy and drift specifications.