MAX6126A21+T

Overview

The MAX6126A21+T is an ultra-low-noise, high-precision series voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 2.048V with an initial accuracy of ±0.06% and a maximum temperature coefficient of 3ppm/°C over the -40°C to +85°C range. The device operates within a supply voltage range of 2.7V to 12.6V, drawing a typical quiescent current of 380μA. It features a low dropout voltage of 200mV and supports sink/source currents up to 10mA. Packaged in an 8-pin μMAX format, it includes force and sense outputs for remote sensing.

Feature Summary

• Features curvature-correction circuitry and laser-trimmed thin-film resistors for high stability.
• Provides independent force (OUTF) and sense (OUTS) connections for Kelvin remote sensing.
• Operates with virtually constant supply current regardless of input voltage variations.
• Capable of sourcing and sinking load currents up to 10mA with low load regulation.

Applications

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

Procurement Notes

Verify the specific suffix '+T' indicates tape-and-reel packaging when ordering. Confirm that the 'A' grade designation corresponds to the required ±0.06% initial accuracy and 3ppm/°C temperature coefficient specifications. Ensure the application environment remains within the specified -40°C to +125°C operating temperature range for guaranteed performance.

Selection Notes

Select this component when a stable, low-noise series reference is required without external biasing resistors. The 2.048V output is suitable for driving ADCs requiring standard reference levels. Consider the 8-pin μMAX package for space-constrained designs. Verify that the 380μA quiescent current meets system power budgets compared to higher-current alternatives.

Part Context

This part belongs to the MAX6126 family of ultra-high-precision, ultra-low-noise series voltage references. The family offers various output voltages including 2.048V, 2.500V, 3.300V, and 4.096V. The MAX6126A21+T specifically denotes the A-grade accuracy version in the μMAX package with a 2.048V output.

Replacement Considerations

Direct substitutes include other MAX6126 variants such as MAX6126B21+T or MAX6126AASA21+, depending on required accuracy grades and package types (SO vs. μMAX). Cross-reference electrical parameters like temperature coefficient and initial accuracy to ensure compatibility.