MAX6138AEXR33+T

Overview

The MAX6138AEXR33+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 3.3V 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 varying currents
• Operational stability without requiring external stabilizing capacitors

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm the exact output voltage, accuracy grade, and packaging configuration. Confirm RoHS compliance status and lead-free specifications directly from the manufacturer's datasheet or authorized distributor listings before procurement.

Selection Notes

Select this component when space-constrained designs require a high-precision shunt reference in a compact footprint. Ensure the application circuit maintains the shunt current between 60μA and 15mA for optimal regulation. Verify that the source resistor selection accommodates the minimum operating current requirements under all expected supply voltage and load conditions.

Part Context

This part belongs to the MAX6138 family of precision shunt voltage references. The 'A' designation indicates a 0.1% initial accuracy grade, while the '33' specifies the 3.3V output voltage. The 'EXR' denotes the SC70-3 package type and tape-and-reel delivery format.

Replacement Considerations

The LM4040/LM4050 series are noted as comparable devices but occupy larger SOT23 packages. Verify pinout compatibility and electrical parameter alignment when considering alternative shunt references.