MAX6126A28+

Overview

The MAX6126A28+ is a series-mode voltage reference from Analog Devices/Maxim Integrated, housed in an 8-pin μMAX package. It provides a fixed output voltage of 2.8V with an initial accuracy of ±0.06%. The device features a maximum temperature coefficient of 3ppm/°C over the -40°C to +85°C range and operates within a supply voltage range of 3.0V to 12.6V. Quiescent supply current is typically 380μA, with a maximum dropout voltage of 0.4V at 10mA load current.

Feature Summary

• Features curvature-correction circuitry and laser-trimmed thin-film resistors for high precision
• Provides independent force (OUTF) and sense (OUTS) outputs for remote sensing capability
• Operates with low quiescent current that remains virtually independent of supply voltage
• Maintains stability with capacitive loads ranging from 0.1μF to 10μF

Applications

• High-Resolution A/D and D/A Converters
• ATE Equipment
• Precision Current Sources
• Digital Voltmeters

Procurement Notes

Verify the specific suffix 'A28+' corresponds to the 2.8V output variant and the 'μMAX' package type during procurement. Confirm RoHS compliance status as indicated by the '+' designation. Ensure the ordering code matches the required initial accuracy grade and temperature coefficient specifications for your application design.

Selection Notes

Select this component when a stable 2.8V reference is required in a compact surface-mount footprint. Consider the 380μA typical supply current for battery-powered designs. Verify that the input voltage stays above the minimum specified limit for the 2.8V output variant. Evaluate the need for remote sensing if trace resistance impacts system accuracy.

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, 2.5V, 3.0V, and 5.0V. The MAX6126A28+ specifically denotes the A-grade accuracy version in the μMAX package, distinguishing it from SO packages or B-grade variants.

Replacement Considerations

Direct pin-compatible replacements within the same family include MAX6126A25+, MAX6126A30+, and MAX6126A33+. These parts share identical pinouts and packaging but provide different fixed output voltages. Ensure the new part's output voltage matches the circuit requirements before substitution.