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Product Detailed Parameters
- Description：IC VREF SHUNT 1.5% 8SOIC
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：-
- Current - Output：20 mA
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The LM385BM-2.5 is a micropower two-terminal voltage reference diode manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed 2.5V output with an initial accuracy of ±0.8%. The device operates within a current range of 20 µA to 20 mA, ensuring stable regulation at low power levels. It features a low dynamic impedance and excellent temperature stability, making it suitable for precision applications requiring minimal quiescent current.
Feature Summary
- Micropower operation with a wide working current range from 20 µA to 20 mA
- High initial voltage accuracy with a tolerance of ±0.8%
- Low dynamic impedance for improved load regulation
- Excellent long-term stability and low noise performance
Applications
- Portable battery-powered instruments
- Precision current sources
- Temperature sensor interfaces
- Cold junction compensation for thermocouples
Procurement Notes
Verify the manufacturer origin, as National Semiconductor assets were acquired by Texas Instruments. Confirm the specific suffix indicates the BM grade for ±0.8% accuracy. Check RoHS compliance status depending on the production batch and era. Ensure the package type matches the design requirements, typically TO-92 or SOIC.
Selection Notes
Select this component when high precision is required alongside ultra-low power consumption. The ±0.8% tolerance offers better accuracy than standard LM385 variants. Consider the operating temperature range and package constraints. Verify that the minimum circuit current exceeds 20 µA to maintain regulation.
Part Context
This device belongs to the LMx85 family of micropower voltage references, which includes LM185, LM285, and LM385 series. These components share similar internal bandgap architectures but differ in temperature ranges and accuracy grades. The LM385BM-2.5 represents the commercial grade with enhanced precision compared to standard versions.
Replacement Considerations
LM385BM-2.5/NOPB
FAQ
What is the minimum operating current for the LM385BM-2.5?
The device requires a minimum cathode current of 20 µA to maintain proper voltage regulation.
How does the LM385BM-2.5 handle capacitive loads?
The device exhibits special tolerance to capacitive loads, allowing it to drive significant capacitance without instability in most reference applications.
