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Product Detailed Parameters
- Description：LM385-1.2-N MICROPOWER VOLTAGE R
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：1.235V
- 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 LM385BYZ-1.2/NOPB is a micropower shunt voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a nominal output of 1.235 V with an initial accuracy of ±0.8%. The device operates within a current range of 20 μA to 20 mA and features a temperature coefficient of 150 ppm/°C. Designed for commercial use, it functions between 0°C and +70°C. The component utilizes a TO-92-3 through-hole package.
Feature Summary
- Provides stable 1.235 V reference voltage with high precision
- Operates over wide dynamic current range from 20 μA to 20 mA
- Low temperature coefficient ensures thermal stability
- Micropower design suitable for battery-operated applications
Applications
- Portable instrumentation requiring low power consumption
- Battery-powered measurement systems
- Precision analog-to-digital converter references
- Voltage regulation circuits in micro-power designs
Procurement Notes
Verify the manufacturer designation as Texas Instruments despite the historical National Semiconductor branding. Confirm the specific suffix 'NOPB' indicates lead-free and RoHS compliance. Ensure the ordering part number matches the exact voltage and package requirements for your circuit design.
Selection Notes
Select this component when a fixed 1.235 V reference is required with tight initial accuracy. Consider the TO-92 package constraints for board space. Evaluate the 150 ppm/°C temperature coefficient against your system's thermal environment to ensure long-term stability meets application specifications.
Part Context
This device belongs to the LM385 family of micropower shunt voltage references. It serves as a legacy component from the National Semiconductor portfolio now managed by Texas Instruments. The part offers a cost-effective solution for basic voltage referencing needs where ultra-low noise or extreme precision is not the primary constraint.
Replacement Considerations
Direct substitutes include LM385BZ-1.2/NOPB and LM385BYZ-1.2. Verify pinout compatibility and thermal characteristics when replacing older non-NOPB versions. Ensure any alternative maintains the same shunt topology and operating current limits.
