LM385Z-1.2G

Overview

The LM385Z-1.2G is a micropower shunt voltage reference from the LM385 series, manufactured by onsemi. It provides a nominal output voltage of 1.235V with an initial precision tolerance of ±2.0%. The device operates within a wide current range of 10μA to 20mA and features low dynamic impedance and low noise characteristics. Packaged in a standard TO-92 three-pin through-hole configuration, it is designed for stable operation over time and temperature variations.

Feature Summary

• Micropower bandgap regulator diode design suitable for wide current ranges
• Low dynamic impedance and low noise performance
• Stable operation across time and temperature variations

Applications

• Portable instruments requiring extended battery life
• Power management circuits
• Analog circuits needing precise voltage references

Procurement Notes

Verify the specific manufacturer designation as onsemi or Texas Instruments, as this component family has multiple historical sources. Confirm the package type is TO-92 and the voltage is 1.235V. Check RoHS compliance status if required for your assembly process. Ensure the pinout matches the standard cathode-ground configuration for TO-92 packages.

Selection Notes

Select this component when a fixed 1.235V reference is needed in a through-hole application. It is suitable for designs prioritizing low power consumption and moderate precision. Consider the ±2.0% tolerance against tighter requirements that might necessitate the B-grade variants. Ensure the operating environment stays within the commercial temperature range.

Part Context

This part belongs to the LM385 series of adjustable and fixed micropower voltage references originally developed by National Semiconductor and later Texas Instruments. The 'Z' suffix typically denotes the TO-92 plastic package, while 'G' often indicates Green/RoHS compliant packaging. It serves as a fundamental building block for analog signal conditioning and measurement systems.

Replacement Considerations

• LM385BZ-1.2/NOPB (Texas Instruments)
• LM385AZ-1.2 (Texas Instruments)

FAQ

What is the recommended operating current range?

The device is designed to operate effectively within a current range of 10μA to 20mA.

How does the package affect thermal performance?

The TO-92 package is suitable for low-power applications where heat dissipation is minimal, typically not requiring additional heatsinking.