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Product Detailed Parameters
- Description：MICROPOWER VOLTAGE REFERENCE DIO
- 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 LM385BZ-2.5/T1 is a micropower voltage reference diode manufactured by National Semiconductor, now part of ON Semiconductor. It provides a stable 2.5V output in a surface-mount TO-92 (SOT-23) package. The device operates as a two-terminal shunt reference with low power consumption, suitable for battery-powered applications. Key electrical characteristics include a nominal output voltage of 2.5V and operation within a specified temperature range.
Feature Summary
- Micropower operation for extended battery life
- Two-terminal shunt voltage reference configuration
- Surface-mount packaging for automated assembly
Applications
- Battery-powered instrumentation
- Portable measurement devices
- Voltage reference for ADCs/DACs
Procurement Notes
Verify the manufacturer designation, as National Semiconductor assets were acquired by ON Semiconductor. Confirm the specific suffix '/T1' indicates the tape-and-reel packaging format. Ensure the component meets RoHS requirements if applicable to your manufacturing standards. Cross-reference datasheets from both National Semiconductor legacy documents and current ON Semiconductor publications for accurate specifications.
Selection Notes
Select this component when a low-cost, low-power shunt reference is required in a small surface-mount package. Compare against other LM385 variants for accuracy grades (e.g., B grade vs. A grade). Consider thermal management and current limiting resistor calculations for shunt operation. Verify compatibility with system supply voltages and noise sensitivity requirements.
Part Context
The LM385 series comprises micropower shunt voltage references available in various output voltages (1.2V, 2.5V, 5.0V). The 'B' suffix typically denotes a tighter initial accuracy tolerance compared to standard grades. The 'TZ' or 'BZ' prefix often indicates the plastic TO-92/SOT-23 package style. This family is widely used in industrial and consumer electronics for stable biasing.
Replacement Considerations
Direct substitutes include LM385BZ-2.5 from Texas Instruments or ON Semiconductor. Check for equivalent accuracy grades and package dimensions. Verify pinout compatibility, especially for SOT-23 packages where pin assignments may vary between manufacturers.
