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Product Detailed Parameters
- Description：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：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The LM385AXZ-2.5 is a micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed nominal output voltage of 2.5 V with an initial accuracy of ±1%. The device operates within a current range of 20 µA to 20 mA and features a temperature coefficient of 50 ppm/°C over the commercial operating temperature range of 0°C to +70°C. It is housed in a TO-92-3 (TO-226) through-hole package.
Feature Summary
- Provides a stable 2.5 V reference voltage suitable for precision applications
- Operates with low quiescent current starting at 20 µA
- Features a low temperature coefficient of 50 ppm/°C for thermal stability
Applications
- Portable instrumentation requiring low power consumption
- Battery-powered measurement systems
- Data acquisition channels requiring precise voltage references
Procurement Notes
Verify component authenticity as National Semiconductor was acquired by Texas Instruments. Confirm that the specific suffix 'AXZ' corresponds to the standard LM385-2.5 specifications and TO-92 packaging. Check datasheets for RoHS compliance status and lead-free availability options such as NOPB variants if required for modern manufacturing standards.
Selection Notes
Select this component when a fixed 2.5 V reference is needed with high accuracy and low current draw. Ensure the load current remains within the 20 µA to 20 mA operational window to maintain regulation. Consider the TO-92 package for through-hole designs where surface mount alternatives like SOIC are not feasible.
Part Context
The LM385 series represents a family of adjustable and fixed micropower voltage references originally developed by National Semiconductor. The LM385AXZ-2.5 specifically denotes the fixed 2.5 V variant in the axial or TO-92 configuration. This component serves as a fundamental building block for analog circuits requiring reliable voltage standards without complex external biasing networks.
Replacement Considerations
Texas Instruments LM385-2.5/NOPB
FAQ
What is the minimum operating current for the LM385AXZ-2.5?
The minimum recommended operating current is 20 µA to ensure proper regulation and stability.
Does the LM385AXZ-2.5 support adjustable output voltages?
No, the LM385AXZ-2.5 is a fixed-output reference providing exactly 2.5 V. Adjustable versions exist under the LM385 designation without the voltage suffix.
