LM285Z-1.2

Overview

The LM285Z-1.2 is a fixed shunt voltage reference diode manufactured by onsemi, housed in a TO-92-3 (TO-226) through-hole package. It provides a nominal output voltage of 1.235 V with an initial accuracy of ±1%. The device operates within a temperature range of -40°C to +85°C and features a standard temperature coefficient of 80 PPM/°C. Electrical specifications include a minimum operating current of 10 µA and a maximum shunt current of 30 mA.

Feature Summary

• Provides a stable fixed reference voltage for precision analog circuits
• Operates efficiently at micro-power levels suitable for battery applications
• Designed as a shunt regulator for simple circuit topologies

Applications

• Precision measurement systems requiring stable voltage references
• Battery-powered equipment where low quiescent current is critical
• Portable instrumentation utilizing shunt regulation architectures

Procurement Notes

Verify the specific manufacturer designation when sourcing, as the LM285 series is produced by multiple vendors including Texas Instruments and Analog Devices. Confirm that the TO-92 package variant matches the required mechanical constraints. Ensure the ±1% accuracy grade meets the design tolerance requirements before procurement.

Selection Notes

Select this component when a low-cost, fixed 1.2V reference is needed for through-hole designs. The 80 PPM/°C temperature coefficient is suitable for general-purpose applications but may require calibration for high-precision needs. Compare against adjustable variants if wider voltage ranges are necessary.

Part Context

This part belongs to the LM285 family of micropower voltage references, which includes adjustable versions and other fixed voltage options like 2.5V. The Z suffix typically denotes the specific voltage bin or accuracy grade within the broader LM285 product line offered by onsemi.