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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 ~ 70°C
- 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 LM385AMX-2.5 is a micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed 2.5V output with an initial accuracy tolerance of ±3%. The device operates within a commercial temperature range of 0°C to 70°C and features a typical temperature coefficient of 150ppm/°C. Designed for surface-mount applications, it utilizes an 8-SOIC package. Key electrical characteristics include a maximum noise of 120µVrms in the 10Hz to 10kHz bandwidth and a cathode current capability up to 20mA.
Feature Summary
- Micropower operation suitable for battery-powered systems
- Fixed 2.5V precision output with tight initial tolerance
- Low dynamic impedance for stable regulation
- Capacitive load tolerant design
Applications
- Portable instrumentation
- Battery-powered measurement devices
- Precision current sources
- Temperature sensor interfaces
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as original specifications may vary by production era. Ensure proper ESD handling during storage and assembly. Validate package marking against official datasheet pinouts to prevent installation errors.
Selection Notes
Select this component when a fixed 2.5V reference is required in space-constrained designs. The 8-SOIC package offers a compact footprint compared to traditional TO-92 options. Consider the ±3% tolerance and 150ppm/°C drift for applications requiring moderate precision without active trimming.
Part Context
This component belongs to the LMx85 series of adjustable micropower voltage references. The 'LM' prefix indicates the base family, while '385' denotes the specific 2.5V variant with commercial grade temperature rating. The 'AMX' suffix specifies the surface-mount SOIC-8 package configuration.
Replacement Considerations
The LM385MX-2.5/NOPB is a confirmed equivalent replacement from Texas Instruments. Verify pin compatibility and thermal performance before substitution.
