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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)：3.3V
- 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：-
- Qualification：-
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Overview
The LM4040DEX3-3.3-T is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, featuring a fixed 3.3 V output. It provides 1% initial accuracy and operates within an industrial temperature range of -40°C to +85°C. The device utilizes a SC-70-3 (SOT-23) surface-mount package and supports a maximum shunt current of 15 mA with ultra-low operating current characteristics.
Feature Summary
- Provides stable fixed output voltage suitable for precision applications
- Designed for space-constrained environments via compact SMD packaging
- Operates reliably across the full industrial temperature range
Applications
- Portable battery-powered instrumentation
- Data acquisition systems requiring precise voltage references
- Microprocessor supply monitoring circuits
Procurement Notes
Verify the specific suffix 'T' indicates tape-and-reel packaging configuration. Confirm the manufacturer designation matches Analog Devices or Maxim Integrated as the component lineage may involve historical branding transitions. Ensure the SC-70-3 footprint aligns with PCB design requirements before procurement.
Selection Notes
Select this component when a 3.3 V reference with 1% tolerance is required in a minimal footprint. Consider the 15 mA maximum shunt current limit for load driving capabilities. Verify that the -40°C to +85°C temperature range meets the operational environment specifications of the target application.
Part Context
This part belongs to the LM4040 family of micropower shunt voltage references known for low power consumption and high stability. The DEX3 variant specifically denotes the SC-70-3 package format, distinguishing it from other package options like SOT-23-3 or TO-99 available within the broader product line.
Replacement Considerations
LM4040BEX3-3.3+T offers higher 0.2% accuracy in the same package. LM4040AEX3-3.3+T provides 0.1% accuracy. For pin-compatible alternatives with different manufacturers, verify electrical parameter compatibility carefully.
