LM385BMX-1.2

Overview

The LM385BMX-1.2 is a micropower shunt voltage reference diode manufactured by Texas Instruments, designed for precision applications requiring stable voltage regulation in surface-mount configurations. This component belongs to the LM385B series and provides a nominal output voltage of 1.235 V with an initial accuracy of ±0.8%. It operates within a commercial temperature range of 0°C to +70°C and features a low temperature coefficient of 20 ppm/°C. The device supports a maximum shunt current of 20 mA and is housed in an 8-pin SOIC package.

Feature Summary

• Provides a fixed 1.235 V reference voltage with high initial accuracy
• Features a low temperature coefficient for stable performance across temperature variations
• Operates as a micropower shunt reference with wide dynamic current range
• Designed for surface-mount integration using standard SOIC packaging

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Battery-powered instrumentation circuits
• Portable measurement equipment requiring stable voltage rails
• Microprocessor power supply monitoring systems

Procurement Notes

Verify the specific suffix configuration against the manufacturer's latest datasheet to ensure compatibility with design requirements. Confirm that the component meets all environmental and safety standards relevant to the target application. Check for any obsolescence notices or lifecycle status updates from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when a fixed 1.235 V reference is required in a surface-mount format. Ensure the operating environment stays within the specified commercial temperature range. Verify that the circuit design can accommodate the minimum operating current to maintain regulation stability. Consider thermal management if the shunt current approaches maximum limits.

Part Context

The LM385BMX-1.2 is part of the broader LM385 family of micropower voltage references, which includes variants with different voltages, accuracies, and packages. This specific model represents the B-grade accuracy version in an 8-pin SOIC package, offering a balance between precision and compact footprint for modern electronic designs.

Replacement Considerations

LM385BMX-1.2/NOPB is a direct equivalent replacement. Verify pinout compatibility and electrical specifications before substitution.