MAX6126A30+

Overview

The MAX6126A30+ is a series-mode precision voltage reference with a fixed 3.000V output, housed in an 8-pin uMAX package. It features a maximum initial accuracy of 0.06% and a temperature coefficient of 2ppm/°C over the -40°C to +85°C range. The device operates from a supply voltage between 3.2V and 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.

Feature Summary

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

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 A-grade accuracy tier and '30' denotes the 3.000V output option. Confirm the '+' suffix ensures lead-free and RoHS compliance as per manufacturer standards. Ensure the uMAX-8 package matches the required footprint constraints. Cross-reference the datasheet revision date to confirm electrical characteristics have not changed.

Selection Notes

Select this component when a stable 3.000V reference is required with tight initial accuracy and low temperature drift. The uMAX package is suitable for space-constrained designs. Verify that the minimum supply voltage requirement of 3.2V aligns with the system power rails. Consider the noise reduction pin if lower wideband noise is necessary for the application.

Part Context

This part belongs to the MAX6126 family of ultra-low-noise, high-precision voltage references. The family offers various output voltages and packages, including SO and uMAX. The MAX6126A30+ specifically targets applications requiring precise analog signal conditioning with minimal thermal drift and high long-term stability.

Replacement Considerations

Direct substitutes within the same family include MAX6126B30+ (lower accuracy) or other voltage variants like MAX6126A33+. For different packages, check MAX6126AASA30+T (SOIC-8). Verify pin compatibility and electrical specifications before substitution.

FAQ

How does the MAX6126A30+ handle load transients?

The device is stable with capacitive loads ranging from 0.1μF to 10μF. For rapidly changing load currents, using a 10μF capacitor in parallel with a 0.1μF capacitor at the output is advantageous to reduce transients.

What is the purpose of the NR pin?

The NR (Noise Reduction) pin allows for improved wideband noise performance. Adding a 0.1μF capacitor to this pin reduces wideband noise and improves AC power-supply rejection.