MAX6126BASA25+T

Overview

The MAX6126BASA25+T is a series-mode voltage reference from Analog Devices/Maxim Integrated, housed in an 8-pin SO package. It provides a fixed output voltage of 2.5V with a maximum initial accuracy of ±0.06%. The device features a maximum temperature coefficient of 5ppm/°C over the -40°C to +85°C range and operates within a supply voltage range of 3.0V to 12.6V. It supports sink/source currents up to 10mA and maintains stability with load capacitances between 0.1μF and 10μF.

Feature Summary

• Features curvature-correction circuitry and laser-trimmed thin-film resistors for high precision.
• Provides independent force (OUTF) and sense (OUTS) outputs 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

Procurement Notes

Verify the specific suffix 'A' indicates the 8-pin SO package and 'B' denotes the ±0.06% accuracy grade. Confirm the '+T' suffix corresponds to tape-and-reel packaging if required by assembly equipment. Ensure the component meets RoHS compliance standards as indicated by the plus sign in the part number. Cross-reference the manufacturer's latest documentation for any potential obsolescence or alternate sourcing options.

Selection Notes

Select this component when a fixed 2.5V reference with ±0.06% initial accuracy is required. The 8-pin SO package is suitable for standard surface-mount assembly processes. Consider the 5ppm/°C temperature coefficient for applications operating between -40°C and +85°C. Verify that the 10mA source/sink capability meets the load requirements without exceeding the specified load regulation limits.

Part Context

This device belongs to the MAX6126 family of ultra-high-precision, ultra-low-noise series voltage references. The family offers various output voltages and accuracy grades across SO and μMAX packages. The MAX6126B variant specifically targets applications requiring tighter initial accuracy than the standard grade while maintaining low power consumption and high stability characteristics typical of the series.

Replacement Considerations

Direct substitutes include other MAX6126 variants with matching output voltage and package type, such as MAX6126AASA25+T for higher accuracy or MAX6126BASA21+T for different voltage. Verify pin compatibility and electrical specifications before substitution.

FAQ

How does the noise reduction pin affect performance?

Connecting a 0.1μF capacitor to the NR pin improves wideband noise and AC power-supply rejection, reducing noise from approximately 75nV/√Hz to 45nV/√Hz for the 2.5V output version.

What is the purpose of the OUTS and GNDS pins?

These are sense outputs used for remote Kelvin connections to cancel voltage drops in the trace resistance between the reference and the load, ensuring higher accuracy at the point of use.