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Product Detailed Parameters
- Description：LM385-ADJ ADJUSTABLE MICROPOWER
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：1.24V
- Voltage - Output (Max)：5.3 V
- 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/NOPB is a micropower shunt voltage reference manufactured by Texas Instruments, continuing the legacy of National Semiconductor. It provides a stable reference voltage with an initial accuracy of ±0.5%. The device operates within a temperature range of 0°C to +70°C and utilizes a TO-92 three-pin package for through-hole mounting. Key electrical characteristics include a maximum shunt current of 20 mA and a minimum operating current as low as 10 µA. The unit features a typical dynamic impedance of less than one ohm and a temperature coefficient of 50 ppm/°C.
Feature Summary
- Provides precise micropower voltage referencing suitable for battery-powered applications
- Operates effectively at very low currents starting from 10 µA
- Features low dynamic impedance for stable output under varying load conditions
Applications
- Battery-powered measurement instruments
- Portable data acquisition systems
- Precision analog-to-digital converter references
Procurement Notes
Verify that the component is sourced from authorized distributors to ensure authenticity. Confirm the presence of the NOPB suffix indicating lead-free and RoHS compliance. Check the datasheet for specific thermal derating requirements in the TO-92 package. Ensure the supply voltage exceeds the reference voltage plus the dropout voltage for proper regulation.
Selection Notes
Select this component when high precision is required alongside minimal power consumption. The ±0.5% initial accuracy makes it suitable for applications demanding tight tolerance without active trimming. Consider the TO-92 package if through-hole assembly is preferred over surface mount alternatives. Evaluate the 50 ppm/°C temperature coefficient against environmental stability requirements.
Part Context
This part belongs to the LM385 family of adjustable micropower voltage references originally developed by National Semiconductor. Following Texas Instruments' acquisition of National Semiconductor, production and documentation were transferred. The LM385 series is widely recognized for its reliability in low-power reference applications across industrial and consumer electronics sectors.
Replacement Considerations
Compatible substitutes include the LM385BZ-1.2/NOPB and LM385BYZ-2.5/NOPB from Texas Instruments. Other manufacturers may offer equivalent two-terminal zener references with similar pinouts and electrical specifications.
