MAX6126AASA25+T

Overview

The MAX6126AASA25+T is an ultra-low-noise, high-precision series voltage reference in an 8-pin SO package. It provides a fixed 2.500V output with ±0.02% initial accuracy and a maximum temperature coefficient of 3ppm/°C over the -40°C to +85°C range. The device operates from a 2.7V to 12.6V supply, draws 380µA typical quiescent current, and supports 10mA sink/source currents. It features low dropout voltage, remote force/sense outputs, and stability with 0.1µF to 10µF load capacitance.

Feature Summary

• Ultra-low noise architecture with flicker noise as low as 1.3µVP-P (0.1Hz to 10Hz) for the 2.048V variant.
• Curvature-correction circuitry and laser-trimmed thin-film resistors ensure high precision and stability.
• Independent force and sense outputs enable remote sensing to cancel line drops.
• Low dropout voltage allows operation with minimal input-to-output differential.

Applications

• High-resolution A/D and D/A converters
• ATE equipment
• Precision current sources
• Digital voltmeters

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the 'A' grade designation matches the required ±0.02% accuracy specification. Ensure the SOIC-8 package footprint aligns with the PCB layout. Check for RoHS compliance status if required by assembly standards.

Selection Notes

Select this part for applications requiring high precision and low noise without excessive supply current. The series mode architecture eliminates the need for external biasing resistors found in shunt references. Consider the wide supply range and low dropout for battery-powered or tight-voltage-margin designs.

Part Context

This component belongs to the MAX6126 family of ultra-high-precision, ultra-low-noise series voltage references. The family includes various output voltages and packages, such as µMAX and SOIC. The 'A' grade denotes tighter accuracy specifications compared to the 'B' grade options within the same series.

Replacement Considerations

Direct replacements include other MAX6126 variants with different output voltages or grades, provided the pinout and package match. Cross-family alternatives may require evaluation of noise, accuracy, and supply current differences.

FAQ

How can wideband noise be improved?

Adding a 0.1µF capacitor to the Noise Reduction (NR) pin improves wideband noise and AC power-supply rejection.

What is the purpose of the OUTS and GNDS pins?

These are force and sense outputs that allow for remote sensing to cancel voltage drops in the connection lines to the load.