MAX6138BEXR41

Overview

The MAX6138BEXR41 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 4.096V with an initial accuracy of 0.2% and a temperature coefficient of 25ppm/°C. The device operates within a supply current range up to 15mA and functions across a temperature range of -40°C to +85°C. It is housed in a subminiature 3-pin SC-70 surface-mount package measuring 1.8mm x 1.8mm.

Feature Summary

• Laser-trimmed resistors ensure precise initial accuracy for stable reference performance.
• Subminiature 3-pin SC-70 package offers significant size reduction compared to SOT23 packages.
• Two-terminal shunt configuration simplifies circuit design and reduces component count.

Applications

• Space-critical applications requiring minimal footprint
• Portable electronic devices with strict power constraints
• Precision measurement systems requiring stable voltage references

Procurement Notes

Verify the specific suffix (e.g., R41) against official datasheets to confirm the exact output voltage and accuracy grade. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer. Ensure the SC-70 package dimensions match your PCB layout requirements before ordering.

Selection Notes

Select this component when a compact, high-precision shunt voltage reference is required. The 4.096V output suits ADC/DAC reference needs. Consider the 25ppm/°C drift for thermal environments. Verify that the shunt topology fits the system's ground-referenced design rather than series regulator architectures.

Part Context

Part of the MAX6138 family of precision voltage references. The 'B' indicates the 0.2% accuracy grade. The 'EXR' denotes the SC-70 tape-and-reel packaging. This series replaces larger packages while maintaining similar electrical characteristics for space-constrained designs.

Replacement Considerations

Check for MAX6138BEXR41+ equivalents from Maxim Integrated. Verify pinout compatibility with SC-70 packages. Compare temperature coefficients and initial accuracy if tighter tolerances are needed.