LM385BXZ-1.2

Overview

The LM385BXZ-1.2 is a micropower shunt voltage reference diode manufactured by National Semiconductor, now part of Texas Instruments. It provides a stable nominal output voltage of 1.235 V with an initial accuracy of ±0.5%. The device operates within a wide current range from 10 µA to 20 mA and features a low temperature coefficient of 15 ppm/°C. It is housed in a TO-92 package suitable for through-hole mounting.

Feature Summary

• Provides a precise 1.235 V reference voltage with high initial accuracy
• Operates efficiently across a wide dynamic current range from microamps to milliamps
• Features extremely low temperature drift for stable performance over varying thermal conditions

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Battery-powered instrumentation circuits
• Portable measurement devices requiring low power consumption

Procurement Notes

Verify the manufacturer origin as National Semiconductor or its successor Texas Instruments. Confirm the specific suffix 'BXZ' corresponds to the required tolerance grade and packaging variant. Ensure compliance with RoHS directives if applicable to the project requirements.

Selection Notes

Select this component when a fixed 1.2V reference is needed with tight initial accuracy. Consider the TO-92 package constraints for board space. Evaluate the 15 ppm/°C temperature coefficient against the system's thermal environment requirements.

Part Context

The LM385 series represents a family of adjustable micropower voltage references. The -1.2 variant specifically targets applications needing a sub-1.5V reference point. This model utilizes bandgap technology to achieve stability, distinguishing it from Zener-based references with higher noise profiles.