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Product Detailed Parameters
- Description：PRECISION MICROPOWER SHUNT VREF
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Bulk
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：-
- Current - Output：15 mA
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SC-70, SOT-323
- Supplier Device Package：SC-70-3
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The LM4040BEX3-2.5-T is a micropower shunt voltage reference manufactured by Analog Devices Inc. under the Maxim Integrated brand. It provides a fixed output voltage of 2.5 V with an initial accuracy of 0.2%. The device features a maximum temperature coefficient of 100 ppm/°C and operates within a temperature range of -40°C to +85°C. It supports a shunt current range from 60 µA to 15 mA and is housed in an SC-70-3 (SOT-323) surface-mount package.
Feature Summary
- Provides stable precision voltage reference performance across industrial temperature ranges
- Designed for space-constrained applications using compact surface-mount packaging
- Operates with ultra-low quiescent current suitable for power-sensitive designs
Applications
- Portable battery-powered instrumentation
- Handheld measurement devices
- Data acquisition systems requiring precise voltage references
Procurement Notes
Verify the manufacturer designation, as this part may be sourced from Analog Devices or Maxim Integrated depending on inventory history. Confirm the specific suffix indicates the SC-70-3 package and tape-and-reel delivery format. Ensure compatibility with existing PCB footprints designed for SOT-323 components before procurement.
Selection Notes
Select this component when a 2.5 V reference with 0.2% accuracy is required in a small form factor. It is suitable for designs prioritizing low power consumption over extreme temperature stability. Compare against the LM4040AIM3 variant if higher accuracy or wider temperature ratings are necessary for the specific application environment.
Part Context
This component belongs to the LM4040 family of micropower shunt voltage references. The family offers various accuracy grades and output voltages. The 'B' suffix denotes 0.2% initial accuracy, while 'EX3' typically indicates the SC-70-3 package and lead-free composition. This series is widely used in general-purpose analog circuits requiring stable reference voltages.
Replacement Considerations
LM4040BIM3-2.5+T: Similar 2.5V reference but in SOT-23-3 package. LM4040BEM3-2.5-T: Similar specifications in SC-70-3 package. Verify pinout compatibility and thermal characteristics when substituting.
