ADR441ARZ-REEL7

Overview

The ADR441ARZ-REEL7 is an ultralow noise, low dropout XFET voltage reference with a fixed output of 2.5 V. It features an initial accuracy of ±0.12% and a temperature coefficient of 10 ppm/°C. The device operates within a supply voltage range of 3 V to 18 V, requiring a minimum headroom of 500 mV. It provides a source current of up to 10 mA and a sink current of up to -5 mA, with a quiescent current of 3.75 mA. The unit is housed in an 8-lead SOIC package and functions reliably across an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Utilizes XFET technology for superior noise performance compared to buried Zener references.
• Features a dedicated TRIM pin allowing output voltage adjustment over a 0.5% range without compromising performance.
• Operates with low supply voltage headroom of 500 mV, suitable for battery-powered applications.

Applications

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

Procurement Notes

Verify the specific electrical grade (A or B) required for your application, as the datasheet distinguishes between grades with different accuracy and drift specifications. Confirm that the SOIC-8 package variant matches your PCB footprint requirements. Ensure input capacitors are selected according to stability guidelines provided in the manufacturer's documentation.

Selection Notes

Select this component when ultralow noise in the 0.1 Hz to 10 Hz band is critical for signal integrity. Consider the 10 ppm/°C temperature coefficient if higher precision than standard bandgap references is needed. Evaluate the 500 mV dropout requirement against your available supply voltage margin to ensure stable regulation under all load conditions.

Part Context

This part belongs to the ADR44x family of XFET voltage references manufactured by Analog Devices. The family includes variants with outputs ranging from 2.048 V to 5.0 V. The ADR441 specifically targets the common 2.5 V reference level used in many analog-to-digital converter interfaces and sensor conditioning circuits.

Replacement Considerations

Public confirmed substitute part numbers: ADR441BRZ, ADR441ARMZ, ADR441ARZ-REEL.