LM4051BIX3-1.2+

Voltage Reference Overview

The LM4051BIX3-1.2+ is a precision two-terminal shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse breakdown voltage of 1.225V with B-grade initial accuracy of ±0.2% maximum at 25°C. The device operates within a wide current range of 60µA to 15mA and features a temperature coefficient of 50ppm/°C guaranteed over the -40°C to +125°C temperature range. It utilizes an ultra-small 3-pin SC-70 surface-mount package measuring 1.8mm x 1.8mm, designed for space-critical applications without requiring external stabilizing capacitors.

Voltage Reference Feature Summary

• Ultra-small 3-pin SC-70 surface-mount package
• No output capacitors required for stability
• Low dynamic impedance ensuring stable accuracy
• Laser-trimmed resistors for high initial accuracy

Voltage Reference Applications

• Space-critical electronic designs
• Portable battery-powered equipment
• Data acquisition systems
• Precision measurement instruments

Voltage Reference Procurement Notes

Verify the specific suffix (+) indicates RoHS compliance when sourcing. Confirm the manufacturer designation matches Analog Devices Inc./Maxim Integrated records. Ensure the SC-70 package dimensions align with PCB layout requirements. Cross-reference the B-grade accuracy specifications against application tolerance needs before final procurement decisions.

Voltage Reference Selection Notes

Select this component for applications requiring minimal footprint and high precision in a two-terminal configuration. The 1.225V output suits low-voltage reference needs where standard 2.5V or 5V references are unsuitable. Consider the 60µA minimum operating current for low-power standby modes. Verify that the 50ppm/°C temperature coefficient meets environmental stability requirements across the full industrial temperature range.

Voltage Reference Part Context

This part belongs to the LM4050/LM4051 family of micropower shunt voltage references. The LM4051 variant specifically offers the 1.225V fixed output option alongside other standard voltages like 2.048V, 2.500V, and 5.000V. The family is characterized by its ability to drive capacitive loads directly without oscillation, distinguishing it from earlier generation references that required external compensation components.

Voltage Reference FAQ

Does the LM4051BIX3-1.2+ require an external capacitor for stability?

No, the device does not require an external stabilizing capacitor and ensures stability with any capacitive load.

What is the guaranteed temperature coefficient for this device?

The temperature coefficient is 50ppm/°C maximum, guaranteed over the -40°C to +125°C temperature range.