MAX6126AASA25+

Overview

The MAX6126AASA25+ is an ultra-low-noise, high-precision series voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 2.5V with an initial accuracy of ±0.02% and a maximum temperature coefficient of 3ppm/°C over the -40°C to +85°C range. The device operates within a supply voltage range of 2.7V to 12.6V, drawing a typical quiescent current of 380μA. It features low dropout voltage, force and sense outputs for remote sensing, and is housed in an 8-pin SO package.

Feature Summary

• Ultra-low noise architecture producing flicker noise as low as 1.3μVP-P (0.1Hz to 10Hz) without increased supply current
• Curvature-correction circuitry with laser-trimmed thin-film resistors ensures high stability and precision
• Force and sense outputs enable remote sensing to cancel voltage drops on connecting lines
• Stable with capacitive loads ranging from 0.1μF to 10μF

Applications

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

Procurement Notes

Verify the specific suffix 'A' indicates the highest accuracy grade (±0.02%) and 'SO' denotes the 8-pin Small Outline package. Confirm RoHS compliance via the '+' suffix. Ensure the application supports the required input voltage range relative to the 2.5V output to maintain regulation within the specified dropout limits.

Selection Notes

Select this component when ultra-low noise and high precision are critical requirements. The series-mode architecture eliminates the need for external resistors found in shunt references. Consider the wide operating temperature range and low power consumption for battery-powered or thermally constrained designs requiring stable reference voltages.

Part Context

This part belongs to the MAX6126 family of ultra-high-precision, ultra-low-noise series voltage references. The family offers various output voltages and packages, including μMAX and SO. The 'A' grade represents the top tier of accuracy and temperature stability within the product line, designed for demanding analog signal processing applications.

Replacement Considerations

Direct substitutes include other MAX6126 variants with different output voltages or packages, such as MAX6126AASA21+ (2.048V). Verify pin compatibility and electrical specifications before substitution.