MAX6126A21+

Overview

The MAX6126A21+ is a series-mode voltage reference with a fixed output of 2.048V, housed in an 8-pin μMAX package. It provides ±0.06% initial accuracy and a maximum temperature coefficient of 3ppm/°C over the -40°C to +85°C range. The device operates from a supply voltage between 2.7V and 12.6V, drawing a typical quiescent current of 380μA. It supports up to 10mA sink/source load current and maintains stability with capacitive loads ranging from 0.1μF to 10μF.

Feature Summary

• Features curvature-correction circuitry and laser-trimmed thin-film resistors for high precision.
• Provides independent force and sense outputs (OUTF and OUTS) for remote sensing applications.
• Operates with low dropout voltage and virtually constant supply current regardless of input voltage.
• Includes a noise reduction pin allowing wideband noise improvement via external capacitor.

Applications

• High-resolution A/D and D/A converters
• Precision current sources
• Digital voltmeters
• High-accuracy industrial and process control systems

Procurement Notes

Verify the specific suffix 'A21+' corresponds to the required 2.048V output, ±0.06% accuracy grade, and 8-pin μMAX package configuration. Confirm that the ordering code matches the manufacturer's official datasheet specifications for the intended operating temperature range and performance class before finalizing procurement.

Selection Notes

Select this component when ultra-low-noise performance and high precision are critical requirements. The series-mode architecture eliminates the need for external biasing resistors found in shunt references. Ensure the application can accommodate the specified capacitive load range and utilizes the force/sense pins if trace resistance compensation is necessary for system accuracy.

Part Context

This part belongs to the MAX6126 family of ultra-high-precision, ultra-low-noise voltage references manufactured by Analog Devices / Maxim Integrated. The family offers various output voltages and packages, utilizing proprietary low-noise architecture to achieve excellent dynamic characteristics without increasing supply current consumption significantly.

Replacement Considerations

Direct replacements within the same family include MAX6126B21+ (same package, different accuracy/tempco grades). Cross-package equivalents such as MAX6126AASA21+ provide identical electrical performance in an SOIC-8 footprint.