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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 2% 8SOIC
- 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：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The LM385MX-NS is an adjustable micropower shunt voltage reference IC manufactured by National Semiconductor. It utilizes a band-gap voltage regulator diode architecture to provide stable reference voltages. The device operates within a current range of 10 µA to 20 mA and features a typical output voltage of 1.24V with a tolerance of ±2%. It is housed in an 8-SOIC surface-mount package and supports input voltages up to 5.3 V.
Feature Summary
- Micropower two-terminal band-gap voltage regulation design
- Adjustable reference voltage capability for flexible circuit integration
- Surface-mount packaging for automated assembly compatibility
Applications
- Precision analog-to-digital converter reference sources
- Low-power portable instrumentation circuits
- Battery-powered measurement systems requiring stable voltage references
Procurement Notes
Verify the manufacturer designation 'NS' corresponds to National Semiconductor specifications. Confirm the 8-SOIC package type matches your PCB footprint requirements. Ensure the ±2% tolerance aligns with your circuit's accuracy needs. Check for any specific handling instructions regarding electrostatic discharge sensitivity during installation.
Selection Notes
Select this component when a low-cost, adjustable voltage reference is required for space-constrained designs. The 8-SOIC package offers a compact solution compared to through-hole alternatives. Consider the 10 µA minimum operating current if designing for ultra-low power standby modes. Verify that the 5.3 V maximum input voltage exceeds your supply rail under all operating conditions.
Part Context
This part belongs to the LM385 family of micropower voltage references from National Semiconductor. The series includes variants with fixed outputs such as 1.2V and 2.5V, alongside adjustable versions. Texas Instruments acquired National Semiconductor, and these components remain supported under the TI portfolio for legacy system maintenance.
Replacement Considerations
Compatible substitutes include LM385MX/NOPB and LM385Z/NOPB from National Semiconductor/Texas Instruments. These equivalents maintain similar electrical characteristics and pin configurations. Verify package dimensions and thermal performance before substitution.
