LM385BLP-1-2

Overview

The LM385BLP-1-2 is a micropower shunt voltage reference manufactured by Texas Instruments. It provides a nominal output voltage of 1.235 V with an initial accuracy tolerance of ±1%. The device operates within a wide current range from 15 µA to 20 mA, ensuring stable performance across varying load conditions. It features a low temperature coefficient of ±20 ppm/°C and functions reliably in commercial temperatures ranging from 0°C to +70°C. The component utilizes a TO-226-3 (TO-92) through-hole package.

Feature Summary

• Provides a precise 1.235 V fixed reference voltage suitable for high-accuracy applications
• Operates efficiently at micropower levels starting from 15 µA cathode current
• Maintains stability with a low temperature coefficient of ±20 ppm/°C
• Features low dynamic impedance for consistent output under load variations

Applications

• Battery-powered portable instruments requiring low quiescent current
• Precision analog-to-digital converter (ADC) reference sources
• Data acquisition systems needing stable voltage benchmarks
• General-purpose linear power supply regulation circuits

Procurement Notes

Verify the specific suffix 'BLP' to confirm the ±1% accuracy grade and TO-226-3 package type. Ensure the procurement channel supplies genuine Texas Instruments components to guarantee the specified temperature coefficient and initial accuracy parameters are met. Cross-reference the datasheet revision to confirm compliance with current RoHS standards.

Selection Notes

Select this component when a fixed 1.235 V reference is required with tighter initial accuracy than standard grades. It is appropriate for designs where through-hole mounting is preferred or necessary. Consider the 15 µA minimum operating current to ensure proper biasing in low-power circuits. Verify that the thermal dissipation capabilities of the TO-226-3 package suit the maximum cathode current of 20 mA in the intended environment.

Part Context

This part belongs to the LM385 family of micropower bandgap voltage references. The 'B' designation indicates a tighter initial accuracy grade compared to standard versions. The 'LP' suffix specifies the plastic TO-92 (TO-226-3) through-hole package style. This series is widely used in industrial and consumer electronics for its balance of precision and low power consumption.

Replacement Considerations

LM385BP-1-2: Standard accuracy version with similar electrical characteristics but potentially wider tolerance.

FAQ

What is the minimum operating current for the LM385BLP-1-2?

The device requires a minimum cathode current of 15 µA to maintain regulation and specified accuracy.

Does the LM385BLP-1-2 support adjustable output voltages?

No, the LM385BLP-1-2 is a fixed-output reference providing a nominal 1.235 V. Adjustable variants exist within the LM385 family but require external resistors.