LM4051BIM3X-1.2

Voltage Reference Overview

The LM4051BIM3X-1.2 is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed reverse breakdown voltage of 1.225V with an initial accuracy of 0.1%. The device features a maximum temperature coefficient of 50ppm/°C guaranteed over the -40°C to +85°C operating range. It operates within a wide current range from 60µA to 15mA and exhibits low output noise of 28µVrms (10Hz to 10kHz). The component is housed in a compact SOT-23-3 package.

Voltage Reference Feature Summary

• Ultra-small 3-pin SC70 or SOT-23 surface-mount package for space-critical applications
• Laser-trimmed resistors ensure excellent initial accuracy without external stabilizing capacitors
• Low dynamic impedance ensures stable reverse breakdown voltage across wide operating temperatures and currents

Voltage Reference Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered systems needing low quiescent current
• Handheld devices with limited board space
• Data acquisition systems requiring stable reference voltages

Voltage Reference Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm exact tolerance, temperature grade, and packaging configuration. Ensure the ordering part number matches the required initial accuracy and thermal specifications for your design. Cross-reference datasheets for any recent package or material changes.

Voltage Reference Selection Notes

Select this component when high precision and small form factor are critical. The 0.1% accuracy and 50ppm/°C coefficient suit applications demanding strict voltage stability. Consider the SOT-23 package for PCB real estate constraints. Evaluate if the 15mA max shunt current meets load requirements.

Voltage Reference Part Context

This part belongs to the LM4050/LM4051 family of precision micropower shunt voltage references. These devices offer multiple fixed reverse breakdown voltages including 1.225V, 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V. They are designed for applications where size, power consumption, and accuracy are paramount.

Voltage Reference Replacement Considerations

LM4051BIM3X-1.2/NOPB

Voltage Reference FAQ

Does the LM4051BIM3X-1.2 require an external capacitor for stability?

No, the LM4051BIM3X-1.2 does not require an external stabilizing capacitor while ensuring stability with any capacitive loads.

What is the operating temperature range for this device?

The specifications are guaranteed over the temperature range of -40°C to +85°C.