LM4040AIM3X-5.0

Overview

The LM4040AIM3X-5.0/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, featuring a fixed 5 V output. It provides an initial accuracy of ±0.1% at 25°C and operates within the industrial temperature range of -40°C to +85°C. The device utilizes a SOT-23 surface-mount package with three pins. Key electrical specifications include a maximum temperature coefficient of 100 ppm/°C, a typical wideband noise of 35 μVrms (10 Hz to 10 kHz), and a recommended operating current range from 74 μA to 15 mA.

Feature Summary

• Eliminates the need for external stabilizing capacitors while ensuring stability with any capacitive load
• Utilizes bandgap reference temperature drift curvature correction and low dynamic impedance for stable performance
• Employs fuse and Zener-zap reverse breakdown voltage trim during wafer sort to ensure high accuracy

Applications

• Portable, battery-powered equipment
• Data acquisition systems
• Instrumentation
• Process controls
• Precision audio components

Procurement Notes

Verify that the ordering suffix 'NOPB' indicates lead-free status and confirms compliance with RoHS directives as per Texas Instruments standards. Ensure the specific grade 'A' matches the required ±0.1% tolerance specification for your design. Confirm the SOT-23 package dimensions align with your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when space-constrained designs require a high-precision shunt reference without external compensation capacitors. The A-grade designation ensures tight initial tolerance suitable for critical measurement applications. Verify that the minimum operating current requirement of the circuit falls within the specified 74 μA to 15 mA range for proper regulation.

Part Context

This part belongs to the LM4040-N family of precision micropower shunt voltage references. The series offers various fixed output voltages including 2.048 V, 2.5 V, 3 V, 4.096 V, 5 V, 8.192 V, and 10 V. Available in sub-miniature packages such as SOT-23, SC70, and TO-92, the family is designed for applications where saving board space is a critical issue alongside power efficiency.

Replacement Considerations

LM4040BIM3X-5.0/NOPB: Offers ±0.2% initial accuracy instead of ±0.1%.

FAQ

Does the LM4040AIM3X-5.0 require an external capacitor for stability?

No, the advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load.

What is the typical noise performance of this voltage reference?

The typical wideband noise is 35 μVrms measured between 10 Hz and 10 kHz.