LM285D-1.2R2G

Overview

The LM285D-1.2R2G is a shunt voltage reference manufactured by onsemi, housed in an 8-SOIC surface-mount package. It provides a fixed output voltage of 1.235V 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 80ppm/°C. It supports a maximum shunt current of 30mA and requires a minimum operating current of 20µA.

Feature Summary

• Provides a stable 1.235V reference voltage for precision circuit applications
• Offers high initial accuracy of ±1% for tight tolerance requirements
• Operates reliably across extended industrial temperature ranges

Applications

• Precision analog-to-digital converter reference inputs
• Portable instrumentation voltage regulation
• Battery-powered measurement systems

Procurement Notes

Verify the specific suffix R2G against official datasheets to confirm packaging configuration and tape-and-reel specifications. Ensure compatibility with existing PCB footprints for the 8-SOIC package. Confirm RoHS compliance status as manufacturing processes may vary by region or production batch. Validate that the ±1% accuracy grade meets the design requirements before finalizing procurement orders.

Selection Notes

Select this component when a low-voltage, high-accuracy reference is required in a compact surface-mount form factor. The 1.235V output is suitable for single-supply systems where lower headroom is needed compared to 2.5V references. Consider the 80ppm/°C temperature coefficient for environments with moderate thermal fluctuations. Ensure the circuit can maintain the minimum 20µA operating current to guarantee regulation stability.

Part Context

This part belongs to the LM285 series of micro-power shunt voltage references from onsemi. The series includes variants with different fixed output voltages such as 1.2V and 2.5V. The LM285D-1.2R2G specifically denotes the 1.235V version packaged in an 8-pin SOIC format, distinguishing it from through-hole or smaller package alternatives within the same functional family.

Replacement Considerations

Compatible substitutes include the LM285D-2.5G for higher voltage needs or other LM285 variants with matching accuracy grades. Verify pinout compatibility for the 8-SOIC package when swapping parts. Check if alternative manufacturers offer equivalent 1.235V shunt references with similar temperature coefficients and current requirements.