MAX6129AEUK21+T

Overview

The MAX6129AEUK21+T is a micropower, low-dropout bandgap voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 2.048V with an initial accuracy of ±0.4% and a maximum temperature coefficient of 40ppm/°C. The device operates within a supply voltage range of 2.5V to 12.6V and draws a maximum supply current of 5.25µA. It features a low dropout voltage of 200mV at 4mA source current and is housed in a miniature 5-pin SOT-23 surface-mount package.

Feature Summary

• Ultra-low power consumption suitable for battery-operated systems
• High precision with ±0.4% initial accuracy and low drift
• Miniature footprint reducing board space requirements
• Internal compensation ensures stability without external capacitors

Applications

• Battery-powered systems
• Handheld instruments
• Precision power supplies
• A/D and D/A converters

Procurement Notes

Verify the specific suffix +T indicates tape-and-reel packaging when sourcing. Confirm the A-grade designation matches the required ±0.4% accuracy specification. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability. Check for RoHS compliance status if environmental regulations apply to the assembly process.

Selection Notes

Select this part when board space is limited due to its compact SOT-23-5 package. Choose the A-grade variant specifically for applications requiring tighter initial accuracy than the B-grade offers. Consider the 2.048V output level against system requirements, as other voltages are available in the same family. Evaluate the ultra-low quiescent current benefit for extending battery life in portable designs.

Part Context

This component belongs to the MAX6129 series of ultra-low-power series voltage references. The series includes variants with different output voltages (2.048V, 2.5V, 3V, 3.3V, 4.096V, 5V) and accuracy grades (A and B). All variants share the same low-power architecture and miniature package options, including die form.

Replacement Considerations

Direct substitutes include MAX6129BEUK21+T for lower accuracy requirements or MAX6129AEUK25+T for a 2.5V output. Other family members like MAX6129AEUK33+T offer different fixed voltages but maintain similar electrical characteristics and pinouts.