LM285D-1.2

Overview

The LM285D-1.2 is a micropower shunt voltage reference diode manufactured by onsemi, housed in an 8-SOIC surface-mount package. It provides a fixed output voltage of 1.235V with an initial accuracy tolerance of ±1%. The device operates within a current range up to 20 mA and maintains a standard temperature coefficient of 80ppm/°C. It functions reliably across a junction temperature range of -40°C to +85°C.

Feature Summary

• Micropower two-terminal bandgap voltage regulator design for low current consumption
• On-chip trimming ensures tight voltage tolerances for precision applications
• Low dynamic impedance and noise characteristics for stable operation
• Wide dynamic operating range enabling excellent regulation under varying supply conditions

Applications

• Portable instrumentation circuits requiring extended battery life
• Micropower analog circuitry and regulators
• Battery-powered systems with widely varying supply voltages

Procurement Notes

Verify the specific suffix (e.g., R2G) against the datasheet to confirm the exact tolerance grade and packaging configuration. Ensure the ordering part number matches the required initial accuracy and thermal specifications. Confirm RoHS compliance status as per the manufacturer's latest documentation before procurement.

Selection Notes

Select this component when a precise 1.235V reference is needed in a compact surface-mount format. Consider the ±1% initial accuracy and 80ppm/°C temperature coefficient for stability requirements. Evaluate the 20mA maximum shunt current capability against the circuit's load demands to ensure proper regulation without exceeding limits.

Part Context

Part of the LM285/LM385 series of micropower voltage references. The LM285 variant is specified for industrial temperature ranges (-40°C to +85°C), distinguishing it from the commercial LM385. Available in both through-hole and surface-mount packages, offering flexibility for various PCB designs.

Replacement Considerations

LM285D-2.5R2G: Same package and series but with a 2.5V output. LM385D-1.2: Commercial temperature range (0°C to +70°C) instead of industrial. Verify pinout compatibility and electrical parameters before substitution.