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Product Detailed Parameters
- Description：IC VREF SHUNT 1% 8SOIC
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：1.235V
- Voltage - Output (Max)：-
- 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 LM385BYMX-1.2/NOPB is a micropower shunt voltage reference manufactured by Texas Instruments, continuing the legacy of National Semiconductor's LM385 series. It provides a nominal output voltage of 1.235 V with an initial accuracy of 1%. The device operates within a temperature range of -40°C to +85°C and features a temperature coefficient of 150 PPM/°C. Electrical specifications include a maximum shunt current of 20 mA and a minimum operating current of 10 µA. It is housed in an SOIC-8 surface-mount package.
Feature Summary
- Provides stable 1.235 V reference voltage for precision applications
- Operates over extended industrial temperature range from -40°C to +85°C
- Designed for low power consumption with micropower characteristics
- Available in compact SOIC-8 surface-mount package
Applications
- Portable instrumentation requiring low power references
- Battery-powered measurement systems
- Data acquisition circuits
- Microcontroller analog-to-digital converter references
Procurement Notes
Verify that the ordering suffix /NOPB confirms lead-free and RoHS compliance status as per manufacturer documentation. Confirm the specific B-grade (1% accuracy) variant matches design requirements rather than standard grades. Ensure the SOIC-8 package footprint aligns with PCB layout constraints. Cross-reference the manufacturer designation to confirm Texas Instruments production origin.
Selection Notes
Select this component when a 1.235 V reference with 1% initial accuracy is required for industrial environments. The SOIC-8 package suits automated surface-mount assembly processes. Consider the 150 PPM/°C temperature coefficient for thermal stability needs. Verify that the 10 µA minimum operating current fits the biasing network design compared to higher current alternatives.
Part Context
This part belongs to the LM385 family of adjustable micropower voltage references originally developed by National Semiconductor and now produced by Texas Instruments following their merger. The LM385 series is widely recognized for its low cost and versatility in providing precise voltage references for various electronic circuits.
Replacement Considerations
LM385BYMX-1.2/NOPB serves as a direct replacement for LM385BYMX-1.2. Other variants within the LM385 series may offer different accuracy grades or temperature ranges but require verification of electrical compatibility.
