MAX6138CEXR25+T

Overview

The MAX6138CEXR25+T is a precision, two-terminal shunt mode bandgap voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse breakdown output voltage of 2.5V with an initial accuracy of 0.5%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 25ppm/°C. It utilizes a subminiature 3-pin SC70 surface-mount package (1.8mm x 1.8mm) and supports a shunt current range from 60μA to 15mA.

Feature Summary

• Ultra-small 3-pin SC70 surface-mount package
• Laser-trimmed resistors for precise initial accuracy
• Low dynamic impedance ensuring stable voltage across wide current ranges
• Capable of operating without external stabilizing capacitors

Applications

• Portable, battery-powered equipment
• Notebook computers
• Cell phones
• Industrial process control

Procurement Notes

Verify the component against official manufacturer datasheets to confirm the specific grade suffix 'C' corresponds to the required 0.5% initial accuracy. Ensure the ordering suffix matches the desired tape-and-reel packaging format. Confirm RoHS compliance status through the manufacturer's documentation before final procurement decisions.

Selection Notes

Select this component when space constraints require a footprint smaller than standard SOT-23 packages while maintaining high precision. The 2.5V output is suitable for interfacing directly with ADCs or DACs requiring that specific reference level. Consider the 0.5% accuracy grade if tighter tolerances are not critical for the application design.

Part Context

This part belongs to the MAX6138 family of precision shunt voltage references. The family offers multiple fixed reverse breakdown voltages including 1.2205V, 2.048V, 3.0V, 3.3V, 4.096V, and 5.0V. Variants are available in three accuracy grades: A (0.1%), B (0.2%), and C (0.5%). All variants share the same compact SC70 package and low-power characteristics.

Replacement Considerations

The LM4040/LM4050 series can be replaced by the MAX6138 as it offers higher precision in a smaller package. Verify pinout compatibility and ensure the replacement maintains the required shunt current limits and thermal performance specifications.