LM385BLPR-1-2

Overview

The LM385BLPR-1-2 is a micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed nominal output voltage of 1.235 V with an initial accuracy tolerance of ±1%. The device operates within a cathode current range of 15 µA to 20 mA and features a temperature coefficient of ±20 ppm/°C. It supports a maximum operating temperature of 70°C and a minimum of 0°C. The component is housed in a TO-92-3 (TO-226AA) surface-mount package, specifically the SOT-23-compatible form factor indicated by the 'L' suffix variant in the series, though datasheets often map this specific part number to the TO-92-3 physical outline for surface mount or standard through-hole equivalents depending on the specific tape-and-reel configuration.

Feature Summary

• Provides stable micropower shunt voltage regulation suitable for low-current applications
• Delivers high precision with ±1% initial accuracy and low temperature drift
• Operates efficiently over a wide cathode current range from microamps to milliamps

Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered measurement systems
• Data acquisition channels needing stable reference potentials

Procurement Notes

Verify the exact package type and marking code against the manufacturer's latest datasheet before ordering, as suffixes can indicate variations in tape-and-reel specifications or RoHS compliance status. Confirm that the supplier provides genuine Texas Instruments products to ensure performance reliability and traceability. Check for any recent production change notices that might affect material composition or testing standards.

Selection Notes

Select this component when a fixed 1.235V reference with tight tolerance is required in a compact surface-mount or small-outline package. Ensure the circuit design accommodates the minimum 15 µA cathode current for proper regulation. Consider the ±20 ppm/°C temperature coefficient for thermal stability requirements in the intended operating environment.

Part Context

This part belongs to the LM385 family of micropower shunt voltage references, which are widely used in industrial and consumer electronics. The 'B' grade indicates tighter accuracy specifications compared to standard grades, while the 'LPR' suffix denotes the specific package and reel configuration. It serves as a cost-effective solution for applications requiring stable reference voltages without the complexity of adjustable regulators.

Replacement Considerations

• LM385BLP-1-2
• LM385BLPE3-1-2

FAQ

What is the minimum cathode current required for regulation?

The device requires a minimum cathode current of 15 µA to maintain proper voltage regulation.

Is this component RoHS compliant?

Yes, the LM385BLPR-1-2 is RoHS compliant and lead-free.