ADR443ARMZ-REEL7

Overview

The ADR443ARMZ-REEL7 is a precision voltage reference from Analog Devices, utilizing XFET technology to achieve ultralow noise and high accuracy. It provides a fixed output of 3.0 V with an initial accuracy of ±0.13% (A Grade) or ±0.04% (B Grade). The device operates over a wide temperature range of -40°C to +125°C and features a low dropout characteristic requiring only 500 mV of headroom. Input voltage ranges from 3.5 V to 18 V, while the quiescent current is typically 3.75 mA. It supports sourcing up to 10 mA and sinking up to -5 mA.

Feature Summary

• XFET technology minimizes voltage change versus temperature nonlinearity for superior stability.
• Ultralow noise performance in the 0.1 Hz to 10 Hz frequency band.
• Low dropout operation allows functionality with minimal supply voltage headroom.
• Integrated trim terminal enables output voltage adjustment without compromising performance.

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 MSOP-8 package variant aligns with your PCB footprint requirements. Ensure input voltage constraints are met within the specified operating range to maintain regulation and thermal stability during procurement planning.

Selection Notes

Select this component when ultralow noise and high precision are critical for signal integrity. The ADR443ARMZ-REEL7 is suitable for applications requiring a stable 3.0 V reference with minimal external components. Consider the available trim capability if system-level calibration is necessary to compensate for initial accuracy tolerances or long-term drift.

Part Context

This part belongs to the ADR44x series of XFET voltage references, which includes models with outputs ranging from 2.048 V to 5.0 V. The series shares common architectural features such as low noise density and high ripple rejection. The ARMZ suffix indicates the MSOP-8 surface-mount package, distinguishing it from the SOIC-8 variant found in other ordering codes within the same family.

Replacement Considerations

ADR443ARZ