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Product Detailed Parameters
- Description：VOLTAGE REFERENCE
- Series：*
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Bulk
- Output Type：-
- Voltage - Output (Min/Fixed)：-
- Voltage - Output (Max)：-
- Current - Output：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The MAX6138CEXR50 is a precision, two-terminal shunt mode bandgap voltage reference manufactured by Analog Devices / Maxim Integrated. It provides a fixed reverse breakdown voltage of 5.0V and is housed in a subminiature 3-pin SC-70 surface-mount package measuring 1.8mm x 1.8mm. The device features laser-trimmed resistors ensuring an initial accuracy of 0.5% and a temperature coefficient of 25ppm/°C. It operates within a temperature range of -40°C to +85°C with a maximum shunt current of 15mA.
Feature Summary
- Compact SC-70 package design suitable for space-critical applications
- Laser-trimmed resistors ensure precise initial accuracy
- Low temperature coefficient for stable performance across operating ranges
Applications
- Portable instrumentation systems requiring small form factors
- Battery-powered measurement devices
- Data acquisition systems needing stable reference voltages
Procurement Notes
Verify the specific suffix 'C' indicates the 0.5% accuracy grade and 'R50' denotes the 5.0V output variant. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure the SC-70 footprint matches your PCB layout requirements exactly.
Selection Notes
Select this component when a compact shunt voltage reference is required for 5V applications. The 0.5% accuracy grade offers a balance between cost and precision. Consider the 15mA maximum shunt current limit during circuit design to ensure proper biasing without exceeding thermal or electrical ratings.
Part Context
This part belongs to the MAX6138 family of precision shunt voltage references. The family includes variants with different fixed breakdown voltages such as 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, and 4.096V. Accuracy grades range from 0.1% to 0.5%, allowing designers to choose based on precision requirements while maintaining the same small package footprint.
Replacement Considerations
Other MAX6138 variants with different voltage outputs (e.g., MAX6138CEXR33) or accuracy grades (e.g., MAX6138AEXR50) may be compatible if electrical parameters align with system requirements. Verify pinout compatibility and thermal characteristics before substitution.
