LM4041QEIM3-1.2/NO

Voltage Reference Overview

The LM4041QEIM3-1.2/NOPB is a micropower shunt voltage reference manufactured by Texas Instruments, providing a stable fixed output voltage of 1.225 V. It features an initial accuracy of ±0.5% at 25 °C and a maximum temperature coefficient of 100 ppm/°C. The device operates within an extended industrial temperature range from -40 °C to +125 °C. It supports a wide operating current range from a typical minimum of 45 µA up to a maximum cathode current of 12 mA. The component is housed in a compact SOT-23-3 surface-mount package with three pins.

Voltage Reference Feature Summary

• Provides a fixed 1.225 V output with high precision and low temperature drift
• Operates stably with all capacitive loads without requiring external output capacitors
• Designed for space-constrained applications using a small SOT-23-3 package
• Suitable for power-restricted designs due to ultra-low operating current

Voltage Reference Applications

• Portable battery-powered equipment requiring precise voltage monitoring
• Data acquisition systems needing stable reference voltages
• Microcontroller analog-to-digital converter (ADC) references
• Temperature sensing circuits utilizing precision voltage standards

Voltage Reference Procurement Notes

Verify the specific suffix 'Q' indicates AEC-Q100 automotive qualification status as per official documentation. Confirm the 'EIM3' designation corresponds to the SOT-23-3 package variant. Ensure the 'NOPB' suffix denotes lead-free and RoHS compliance. Cross-reference the full part number against the manufacturer's latest datasheet to confirm active status and exact electrical tolerances before procurement.

Voltage Reference Selection Notes

Select this component when an automotive-grade or extended temperature range voltage reference is required. The ±0.5% accuracy offers a balance between cost and performance for general precision applications. Consider the 12 mA maximum current capability if higher load currents are needed compared to lower-power variants. The SOT-23-3 package is ideal for PCBs with strict space limitations.

Voltage Reference Part Context

This part belongs to the LM4041 family of micropower shunt voltage references from Texas Instruments. The family includes various accuracy grades (A, B, C, D) and temperature ranges (Industrial and Extended). The LM4041 series is known for its stability with capacitive loads and low dynamic impedance, making it a versatile choice for precision analog circuits across industrial and consumer electronics.

Voltage Reference Replacement Considerations

LM4041CEM3-1.2/NOPB: Industrial temperature grade (-40°C to +85°C), same package and accuracy.

Voltage Reference FAQ

Does the LM4041QEIM3-1.2/NOPB require an external capacitor for stability?

No, the device is designed to be stable with all capacitive loads and does not require an external output capacitor.

What is the maximum operating current for this voltage reference?

The maximum cathode current is 12 mA, allowing it to handle significant load variations while maintaining regulation.