MAX6126B25+

Overview

The MAX6126B25+ is a series voltage reference with a fixed 2.500V output, 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 within the -40°C to +85°C range. The device operates on a supply voltage between 2.7V and 12.6V, drawing a typical quiescent current of 380μA. It supports sink/source currents up to 10mA and maintains stability with load capacitances from 0.1μF to 10μF.

Feature Summary

• Ultra-low noise architecture providing flicker noise as low as 1.3μVP-P without increased supply current
• Curvature-correction circuitry combined with laser-trimmed thin-film resistors for high precision
• Independent force and sense outputs (OUTF/OUTS) enabling remote sensing to cancel line drops

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 'B' indicates B-grade accuracy and '25' denotes the 2.500V output. Confirm the '+T' or standard designation matches the required tape-and-reel or tube packaging. Ensure the manufacturer is identified as Analog Devices Inc./Maxim Integrated for authenticity.

Selection Notes

Select this component when ultra-low noise and high precision are critical. The B-grade offers slightly lower accuracy than the A-grade but maintains excellent thermal performance. Consider the μMAX package for space-constrained designs requiring surface-mount installation.

Part Context

This part belongs to the MAX6126 family of ultra-high-precision, ultra-low-noise series voltage references. The family utilizes proprietary low-noise architecture and curvature correction to achieve exceptional stability across wide temperature ranges and supply voltages.

Replacement Considerations

Direct substitutes include other MAX6126 variants such as MAX6126A25+ for higher accuracy or MAX6126BASA25+ for SOIC packaging compatibility.

FAQ

How does the noise reduction pin affect performance?

Adding a 0.1μF capacitor to the NR pin improves wideband noise and AC power-supply rejection, reducing noise from 75nV/√Hz to 45nV/√Hz.

What is the purpose of the GNDS pin?

The GNDS pin provides a ground-sense connection that allows the device to cancel voltage drops in the ground return line when connected to the load ground.