ADR445ARZ-REEL7

Overview

The ADR445ARZ-REEL7 is a precision voltage reference from the ADR44x series, utilizing XFET technology to achieve ultralow noise and high accuracy. It provides a fixed output of 5.0 V with an initial accuracy of ±6 mV (A grade) or ±2 mV (B grade). The device operates over a wide temperature range of -40°C to +125°C with a temperature coefficient of 10 ppm/°C (A grade) or 3 ppm/°C (B grade). It features low dropout operation requiring only 500 mV headroom, with an input voltage range up to 18 V. The part can source up to 10 mA and sink up to -5 mA, while consuming approximately 3.75 mA of quiescent current.

Feature Summary

• Ultralow noise performance in the 0.1 Hz to 10 Hz frequency band
• Low dropout operation capability with minimal supply voltage headroom
• Integrated trim terminal for output voltage adjustment without compromising performance
• High output drive capability allowing both sourcing and sinking currents

Applications

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

Procurement Notes

Verify the specific electrical grade (A or B) required for your application, as accuracy and temperature coefficient specifications differ between grades. Confirm that the REEL7 suffix matches your automated assembly requirements. Ensure the input voltage supply meets the minimum headroom requirement relative to the 5.0 V output. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when low noise and high stability are critical for signal integrity. The ADR445ARZ-REEL7 is suitable for applications requiring a stable 5.0 V reference with minimal power consumption. Consider the thermal resistance characteristics if operating at elevated ambient temperatures. Evaluate the need for external trimming based on system-level accuracy requirements versus the inherent initial accuracy of the selected grade.

Part Context

This component belongs to the ADR44x family of XFET voltage references manufactured by Analog Devices Inc. The family includes variants with different output voltages such as 2.048 V, 2.500 V, 3.000 V, and 4.096 V. All members share similar architectural benefits including low noise, low drift, and low dropout capabilities. The ADR445 variant specifically targets applications needing a standard 5.0 V reference level.

Replacement Considerations

Direct substitutes within the same family include other ADR44x models with different voltage outputs. Verify pin compatibility and package type before substitution. Cross-referencing with other XFET series parts may require evaluation of noise and current specifications.