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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：-40°C ~ 85°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 LM285BYZ-2.5 is a micropower shunt voltage reference diode manufactured by Texas Instruments, formerly National Semiconductor. It provides a stable 2.5 V output with an initial accuracy of 3% and a temperature coefficient of 150 PPM/°C. The device operates within a current range of 20 µA to 20 mA and functions across a commercial temperature range of 0°C to +70°C. Packaged in a TO-92-3 through-hole configuration, it serves as a precision reference for low-power applications requiring minimal quiescent current.
Feature Summary
- Micropower two-terminal band-gap voltage regulator diode design
- Shunt regulation capability over a wide current range
- Commercial grade temperature stability for general-purpose use
Applications
- Battery-powered instrumentation references
- Portable measurement equipment
- Low-power data acquisition systems
Procurement Notes
Verify the manufacturer designation carefully, as Texas Instruments acquired National Semiconductor. Ensure the specific suffix matches the required temperature range and package variant. Confirm RoHS compliance status via the official datasheet before procurement. Cross-reference the ordering number with current TI catalogs to ensure availability and correct component revision.
Selection Notes
Select this component when a 2.5 V reference is needed with moderate accuracy requirements. Consider the 150 PPM/°C temperature coefficient for thermal environments. Evaluate the 20 µA minimum operating current against system standby loads. Compare against LM385 variants if extended temperature ranges or tighter tolerances are required for the specific application constraints.
Part Context
This part belongs to the LM285 series of micropower voltage references. It shares architectural similarities with the LM185 (military) and LM385 (commercial) families. The 'BYZ' suffix typically denotes the specific plastic TO-92 package variant. These devices are widely used as foundational reference elements in analog signal conditioning circuits.
Replacement Considerations
- LM385BYZ-2.5/NOPB
- LM285Z-2.5/NOPB
FAQ
What is the minimum operating current for the LM285BYZ-2.5?
The device requires a minimum shunt current of 20 µA to maintain regulation.
Does the LM285BYZ-2.5 support military temperature ranges?
No, the BYZ variant is specified for a commercial temperature range of 0°C to +70°C.
