MAX6126B50+T

Overview

The MAX6126B50+T is a series-mode voltage reference from Analog Devices/Maxim Integrated, providing a fixed 5.000V output. It features B-grade initial accuracy of ±0.06% and a maximum temperature coefficient of 5ppm/°C over the -40°C to +85°C range. The device operates within a supply voltage range of 5.2V to 12.6V, drawing a typical quiescent current of 380µA. It supports sink/source currents up to 10mA with a maximum dropout voltage of 0.4V at full load.

Feature Summary

• Ultra-low noise architecture producing flicker noise as low as 2.85µVP-P (0.1Hz to 10Hz) without increased supply current.
• Curvature-correction circuitry combined with laser-trimmed thin-film resistors ensures high stability and precision.
• Independent force and sense outputs enable remote sensing to cancel voltage drops in connection lines.
• Stable operation guaranteed with capacitive loads ranging from 0.1µF to 10µF.

Applications

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

Procurement Notes

Verify the specific suffix '+T' indicates tape-and-reel packaging when sourcing. Confirm the 'B' grade designation matches the required ±0.06% accuracy for your design. Ensure the input supply voltage exceeds the minimum requirement of 5.2V to maintain regulation. Check for RoHS compliance documentation associated with the lead-free package marking.

Selection Notes

Select this component when a fixed 5V reference is needed with high precision and low noise. The B-grade specification offers a balance between cost and performance compared to the A-grade variant. Consider the SO or µMAX package availability based on board space constraints. Verify that the 10mA output capability meets the load requirements of the downstream circuitry.

Part Context

This part belongs to the MAX6126 family of ultra-high-precision, ultra-low-noise series voltage references. The family includes various output voltages and accuracy grades. The MAX6126 series is designed for applications demanding excellent long-term stability and low thermal drift across wide operating temperature ranges.

Replacement Considerations

Direct substitutes include other MAX6126 variants with different output voltages or accuracy grades, such as MAX6126A50+T for higher precision. Cross-family replacements may require verification of pin compatibility and electrical parameter alignment.

FAQ

How does the noise reduction pin affect performance?

Adding a 0.1µF capacitor to the NR pin reduces wideband noise and improves AC power-supply rejection. It also increases the turn-on settling time significantly.

What is the purpose of the OUTS and GNDS pins?

These are sense outputs used for remote Kelvin connections. They allow the device to compensate for voltage drops in the traces connecting the reference to the load.