MAX6126B25+T

Overview

The MAX6126B25+T is a series-mode voltage reference with a fixed output of 2.500V, housed in an 8-pin μMAX package. It features a maximum initial accuracy of ±0.1% and a temperature coefficient of up to 3ppm/°C across the -40°C to +125°C range. The device operates within a supply voltage range of 2.7V to 12.6V, drawing a typical quiescent current of 380μA. It supports sink/source currents up to 10mA and maintains stability with load capacitances between 0.1μF and 10μF.

Feature Summary

• Ultra-low noise architecture providing flicker noise as low as 1.45μVP-P (0.1Hz to 10Hz) without increased supply current.
• Curvature-correction circuitry utilizing laser-trimmed thin-film resistors for high precision and long-term stability.
• Independent force and sense outputs enable remote sensing to cancel voltage drops on connecting lines.
• Low dropout capability allows operation with minimal input-to-output differential voltage.

Applications

• High-resolution analog-to-digital and digital-to-analog converters
• Automated test equipment requiring stable reference voltages
• Precision current sources for sensor biasing
• Digital voltmeters and high-accuracy industrial process control systems

Procurement Notes

Verify the specific suffix 'B' indicates the B-grade accuracy tier and '25' denotes the 2.500V output. Confirm the '+T' suffix corresponds to the tape-and-reel packaging format rather than cut tape or tube. Ensure the component matches the 8-pin μMAX footprint dimensions before integration into the PCB layout.

Selection Notes

Select this part when ultra-low noise performance is critical alongside high precision. The B-grade specification offers tighter tolerance than standard grades but differs from the A-grade's lower temperature coefficient. Consider the μMAX package size constraints and verify that the required load capacitance falls within the stable 0.1μF to 10μF range for optimal transient response.

Part Context

This component belongs to the MAX6126 family of ultra-high-precision, ultra-low-noise series voltage references manufactured by Analog Devices / Maxim Integrated. The family includes various output voltages and grade options, all sharing the same core curvature-corrected architecture designed for demanding signal chain applications requiring minimal drift and noise.

Replacement Considerations

Direct substitutes include other MAX6126 variants such as MAX6126A25+T or MAX6126BASA25+T, provided the package type and electrical specifications align with the design requirements. Verify pin compatibility and thermal characteristics when swapping between SO and μMAX packages.