LM4051BIM3-1.2/NOPB

Voltage Reference Overview

The LM4051BIM3-1.2/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, housed in a compact SOT-23-3 surface-mount package. It provides a fixed output voltage of 1.225 V with an initial accuracy of ±0.2% at 25°C. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 50 ppm/°C. It requires no external stabilizing capacitor for stability across any capacitive load. The minimum operating current is 60 µA, with a maximum cathode current of 12 mA.

Voltage Reference Feature Summary

• Advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load.
• Provides a fixed 1.225 V reverse breakdown voltage option for space-critical applications.
• Utilizes fuse and Zener-zap reverse breakdown voltage trim during wafer sort to ensure high initial accuracy.
• Bandgap reference temperature drift curvature correction ensures stable performance over wide operating temperatures.

Voltage Reference Applications

• Battery-powered equipment requiring low quiescent current
• Data acquisition systems needing precise voltage references
• Portable instruments and handheld devices

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free and RoHS compliance as per Texas Instruments standards. Confirm the 'B' grade designation corresponds to the required ±0.2% initial accuracy for your application. Ensure the SOT-23-3 package dimensions match your PCB footprint constraints. Check for any recent Product Change Notifications (PCNs) regarding manufacturing site or material changes before final procurement.

Voltage Reference Selection Notes

Select this component when a fixed 1.225 V reference is needed in a small SOT-23 package. The B grade offers a balance between cost and precision compared to the A grade. Consider the 50 ppm/°C temperature coefficient for thermal stability requirements. Verify that the 60 µA minimum operating current meets the system's power budget and load conditions.

Voltage Reference Part Context

This part belongs to the LM4051-N family of precision micropower shunt voltage references from Texas Instruments. The family includes adjustable versions and other fixed voltage options. The LM4051-N series is designed for applications where space is limited and low power consumption is critical. It shares similar architectural features with the LM4041-N but offers different accuracy grades and packaging options.

Voltage Reference Replacement Considerations

LM4051AIM3-1.2/NOPB: Offers higher accuracy (±0.1%) with identical pinout and functionality. LM4051CIM3-1.2/NOPB: Provides lower accuracy (±0.5%) potentially at a lower cost point. LM4041BIX3-1.2: Similar performance but in SC-70 package; verify footprint compatibility.