LM285AMX-1.2

Overview

The LM285AMX-1.2 is a micropower shunt voltage reference diode manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 1.235 V with an initial accuracy tolerance of 1%. The device operates within a temperature range of -40°C to +85°C and features a typical temperature coefficient of 80 ppm/°C. It supports a maximum shunt current of 20 mA and a minimum operating current of 10 µA. The component is housed in an SOIC-8 surface-mount package.

Feature Summary

• Provides a stable 1.235 V reference voltage suitable for precision applications
• Operates over an extended industrial temperature range from -40°C to +85°C
• Designed for low-power consumption with micropower current requirements

Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring precise voltage references
• Temperature measurement circuits

Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments on the datasheet header. Confirm the suffix 'MX' indicates the SOIC-8 tape-and-reel packaging configuration. Ensure the '-1.2' designation matches the required 1.235 V output voltage. Check RoHS compliance status if environmental regulations apply to the specific production batch.

Selection Notes

Select this component when a low-cost, micropower shunt reference is needed for 1.235 V applications. The 1% initial accuracy is sufficient for general-purpose analog circuits. Consider the SOIC-8 package for automated surface-mount assembly. Evaluate the 80 ppm/°C temperature coefficient against system thermal stability requirements.

Part Context

The LM285 series belongs to the family of micropower voltage reference diodes. It serves as a cost-effective alternative to more complex regulator ICs for simple reference needs. The device utilizes bandgap technology to maintain voltage stability across varying temperatures and load currents.

Replacement Considerations

LM285BYMX-1.2/NOPB (Texas Instruments)

FAQ

What is the nominal output voltage of the LM285AMX-1.2?

The nominal output voltage is 1.235 V.

Does the LM285AMX-1.2 require a minimum operating current?

Yes, it requires a minimum operating current of 10 µA to maintain regulation.