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Product Detailed Parameters
- Description：TWO TERMINAL VOLTAGE REFERENCE,
- 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：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The LM385BXZ-2.5 is a micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a nominal output voltage of 2.5 V with an initial accuracy of ±0.8%. The device operates within a current range of 10 µA to 20 mA and features a low temperature coefficient of 40 ppm/°C. It is housed in a TO-92 (TO-226AA) three-pin package and supports a maximum operating temperature of 70 °C.
Feature Summary
- Provides stable 2.5 V reference voltage with high precision
- Operates at extremely low quiescent currents for power efficiency
- Low temperature coefficient ensures stability across thermal variations
- Compact through-hole packaging suitable for space-constrained designs
Applications
- Portable battery-powered instrumentation
- Data acquisition systems requiring precise voltage references
- Microprocessor supervisory circuits
- Temperature measurement systems
Procurement Notes
Verify the manufacturer origin as National Semiconductor or Texas Instruments depending on production era. Confirm the suffix 'B' indicates ±0.8% accuracy and 'XZ' denotes the TO-92 package. Ensure RoHS compliance status matches specific procurement requirements, as older NS versions may differ from modern TI equivalents.
Selection Notes
Select this component when a 2.5 V reference with ±0.8% initial accuracy is required. It is suitable for applications needing operation down to 10 µA. Compare against LM385Z-2.5 if higher accuracy is not critical, or LM385AXZ-2.5 for tighter tolerance specifications. Ensure the TO-92 package fits the PCB layout constraints.
Part Context
The LM385 series includes adjustable and fixed voltage references available in 1.2 V and 2.5 V outputs. The LM385BXZ-2.5 belongs to the fixed 2.5 V variant with improved accuracy over standard grades. It shares the family's micropower characteristics and shunt regulation topology, widely used in industrial and consumer electronics.
Replacement Considerations
LM385Z-2.5 offers similar functionality with ±1% accuracy. LM385AZ-2.5 provides ±0.5% accuracy. LM285-2.5 is a military-grade equivalent. Verify pinout compatibility and thermal performance when substituting.
