MAX6126AASA41+

Overview

The MAX6126AASA41+ is an ultra-low-noise, high-precision series voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 4.096V with an initial accuracy of ±0.02% and a maximum temperature coefficient of 5ppm/°C over the -40°C to +125°C automotive temperature range. The device operates from 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 SOIC, 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
• ATE equipment
• Precision current sources
• Digital voltmeters

Procurement Notes

Verify the specific suffix 'AASA41+' against the manufacturer's official datasheet to confirm the 4.096V output voltage, ±0.02% accuracy grade, and 8-pin SO package configuration. Ensure the component meets the required -40°C to +125°C operating temperature range for your application environment. Cross-reference the part number with authorized distributors to confirm availability status and lead times prior to ordering.

Selection Notes

Select this component when a stable 4.096V reference is required with minimal drift over wide temperature ranges. The series-mode architecture eliminates the need for external biasing resistors found in shunt references. Consider the 10mA current capability if driving moderate loads directly. The presence of separate sense pins allows for compensation of trace resistance errors in precision measurement systems.

Part Context

This device belongs to the MAX6126 family of ultra-high-precision voltage references. The family offers various output voltages including 2.048V, 2.500V, and 5.000V. The 'A' grade denotes the highest accuracy tier within the series. Other packages include µMAX-8, while different suffixes indicate varying output voltages or accuracy grades.

Replacement Considerations

Direct substitutes within the same family include MAX6126BASA41+ (±0.06% accuracy) or MAX6126AASA21+ (2.048V output). Verify that any replacement maintains the 8-pin SO package and meets the 4.096V output requirement. Check if the alternative grade's temperature coefficient and noise specifications are acceptable for the design.

FAQ

How does the MAX6126AASA41+ handle load regulation?

The device guarantees load regulation less than 0.025Ω for both sink and source currents up to 10mA, ensuring stable output voltage under varying load conditions.

What is the purpose of the NR pin on this device?

The NR (Noise Reduction) pin allows for improved wideband noise performance and AC power-supply rejection when a capacitor, typically 0.1µF, is connected to it.