ADR441ARMZ-REEL7

Overview

The ADR441ARMZ-REEL7 is a precision low dropout voltage reference utilizing XFET technology, offering ultralow noise and high accuracy. It provides a nominal output voltage of 2.500 V with an initial accuracy of ±3 mV (A Grade) or ±1 mV (B Grade). The device features a temperature coefficient of 10 ppm/°C (A Grade) or 3 ppm/°C (B Grade) over the -40°C to +125°C range. It operates with a supply voltage headroom as low as 500 mV and supports sourcing up to 10 mA and sinking up to -5 mA. Noise performance is specified at 1.2 µV p-p from 0.1 Hz to 10 Hz.

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 minimal supply voltage headroom of 500 mV while maintaining stability.
• Provides both source and sink current capabilities for flexible circuit integration.

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 initial accuracy and temperature coefficient specifications differ between grades. Confirm package availability, as the component is offered in both 8-lead SOIC_N and MSOP formats. Ensure input capacitors are selected according to datasheet recommendations for optimal stability and transient response.

Selection Notes

Select the ADR441ARMZ-REEL7 when ultralow noise and high precision are critical for signal integrity. Choose the B Grade variant if tighter initial accuracy and lower temperature drift are necessary. Consider the trim capability if system-level calibration is required to compensate for external errors. Evaluate power dissipation constraints based on the maximum load current and thermal resistance of the chosen package.

Part Context

This component belongs to the ADR440/ADR441/ADR443/ADR444/ADR445 family of XFET voltage references. These devices share common architectural features including low dropout operation, high output drive capability, and extended industrial temperature ranges. The family is designed for applications requiring superior noise performance and long-term stability compared to traditional bandgap or zener references.

Replacement Considerations

Direct substitutes within the same family include ADR440, ADR443, ADR444, and ADR445 variants, provided the output voltage matches the design requirements. Cross-family replacements should be evaluated based on noise density, temperature coefficient, and package compatibility.