MAX6138AEXR12+T

Overview

The MAX6138AEXR12+T is a precision, two-terminal shunt mode bandgap voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse breakdown voltage of 1.2205V with an initial accuracy of 0.1%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 25ppm/°C. It supports a wide operating current range from 60μA to 15mA and utilizes a subminiature 3-pin SC70 surface-mount package.

Feature Summary

• Ultra-small 3-pin SC70 surface-mount package
• Laser-trimmed resistors ensure precise initial accuracy
• Low dynamic impedance for stable performance across currents
• Stable with capacitive loads without external stabilizing capacitors

Applications

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

Procurement Notes

Verify the specific suffix 'A' indicates the 0.1% accuracy grade and 'EXR12' denotes the 1.2205V output in the SC70-3 package. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor channels before procurement. Ensure supply chain sources are verified against the manufacturer's authorized list to prevent counterfeit components.

Selection Notes

Select this component when space constraints require a subminiature footprint smaller than standard SOT23 packages. Choose the A-grade variant specifically for applications demanding the highest initial accuracy of 0.1%. Ensure the design maintains the shunt current between 60μA and 15mA to guarantee specified performance parameters and stability under varying load conditions.

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, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V. All variants share the same ultra-small SC70 package and low-noise characteristics, differing primarily in their output voltage and initial accuracy grades.

Replacement Considerations

The MAX6138 is explicitly noted as offering higher precision in a smaller package compared to LM4040/LM4050 devices. Verify pin compatibility and thermal dissipation requirements when substituting other shunt references. No direct public substitute part numbers are confirmed in the provided documentation.