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Product Detailed Parameters
- Description：IC VREF SHUNT 1% TO92-3
- Series：-
- Mfr：Texas Instruments
- Package：Box
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：1.235V
- Voltage - Output (Max)：-
- Current - Output：20 mA
- Operating Temperature：-40°C ~ 85°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 LM285BYZ-1.2/NOPB is a micropower shunt voltage reference diode manufactured by Texas Instruments, providing a nominal output of 1.235 V. It operates within a current range of 10 μA to 20 mA and features an initial accuracy of ±2.0%. The device utilizes a TO-92 (LP) three-pin package suitable for through-hole mounting. It supports a wide operating temperature range from -40°C to +85°C with a temperature coefficient of 150 ppm/°C.
Feature Summary
- Provides stable 1.235 V reference voltage in a compact TO-92 package
- Operates efficiently with micropower consumption across a wide current range
- Maintains specified performance over extended industrial temperature conditions
Applications
- Battery-powered measurement systems requiring low power references
- Portable instrumentation circuits needing stable voltage benchmarks
- Temperature sensing interfaces utilizing shunt reference topology
Procurement Notes
Verify the specific suffix 'BYZ' indicates the required accuracy grade and package variant against official Texas Instruments documentation. Confirm that the TO-92 (LP) footprint matches your PCB design requirements. Ensure the operating environment stays within the specified -40°C to +85°C range to maintain the stated 150 ppm/°C stability. Cross-reference the datasheet for proper biasing current limits between 10 μA and 20 mA.
Selection Notes
Select this component when a fixed 1.235 V reference is needed in a through-hole configuration. The TO-92 package offers mechanical robustness for non-SMT applications. Consider the ±2.0% initial accuracy if tighter tolerances are not critical. The micropower characteristic makes it suitable for battery-operated devices where standby current must be minimized compared to higher-current zener alternatives.
Part Context
This part belongs to the LM285 family of micropower voltage references, which includes adjustable and fixed versions. The LM285 series is designed as a cost-effective alternative to more complex regulator ICs for simple reference tasks. The 'NOPB' suffix denotes lead-free and RoHS compliance, aligning with modern environmental standards for electronic components distributed globally.
Replacement Considerations
LM285Z-1.2/NOPB: Same electrical specifications but in a standard TO-92 bulk package rather than LP. LM285M/NOPB: Adjustable version in SOIC-8 package; requires external resistors to set voltage. LM385BZ-1.2/NOPB: Similar performance but may differ in specific accuracy grades or package dimensions.
