LM4051CIM3-1.2+

Voltage Reference Overview

The LM4051CIM3-1.2+ is a precision micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse breakdown voltage of 1.225V with an initial accuracy grade of C (±0.5%). The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 50ppm/°C. It utilizes a SOT-23-3 surface-mount package.

Voltage Reference Feature Summary

• Provides a fixed 1.225V output without requiring external stabilizing capacitors.
• Maintains stability when connected to any capacitive load.
• Designed for space-critical applications using a subminiature 3-pin package.

Voltage Reference Applications

• Portable, battery-powered equipment
• Notebook computers
• Cell phones
• Industrial process controls

Voltage Reference Procurement Notes

Verify the specific suffix against manufacturer documentation to confirm the exact accuracy grade and temperature rating. Ensure the ordering code matches the required performance specifications for the target application environment.

Voltage Reference Selection Notes

Select this component for designs requiring a stable 1.225V reference in compact form factors. The C-grade accuracy suits applications where tighter tolerances are not critical, while the micropower consumption supports battery-operated systems.

Voltage Reference Part Context

This part belongs to the LM4050/LM4051 family of bandgap voltage references. These devices are laser-trimmed for excellent initial accuracy and offer multiple fixed voltage options. They are designed to replace larger packages while maintaining high precision and low noise characteristics.

Voltage Reference Replacement Considerations

Check for direct equivalents such as LM4051BIM3-1.2/NOPB or LM4051AIM3-1.2/NOPB from Texas Instruments if higher accuracy grades (A or B) are required. Verify pinout compatibility before substitution.