LM4040CIM3-8.2

Overview

The LM4040CIM3-8.2 is a precision micropower shunt voltage reference from Texas Instruments, providing a fixed reverse breakdown voltage of 8.192 V. It operates within an industrial temperature range of -40°C to +85°C and features a maximum initial accuracy of ±0.5%. The device requires a minimum operating current of 91 μA and supports a maximum operating current of 15 mA. It utilizes a SOT-23 surface-mount package with three pins.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific tolerance grade suffix (e.g., C for ±0.5%) against design requirements. Confirm the package type matches the PCB footprint. Ensure the supply voltage exceeds the 8.192 V reference by sufficient headroom for the series resistor. Check for automotive qualification if required, as standard grades differ from Q1 variants.

Selection Notes

Select this component when a compact, low-power shunt reference is needed for 8.192 V applications. Consider the ±0.5% initial accuracy and 100 ppm/°C temperature coefficient for industrial environments. Verify that the circuit can maintain the minimum 91 μA cathode current for proper regulation without exceeding the 15 mA maximum limit.

Part Context

This part belongs to the LM4040-N family of precision micropower shunt voltage references. The family offers various fixed voltages including 2.048 V, 2.5 V, 4.096 V, and 10 V in SOT-23, SC70, and TO-92 packages. The 'CIM3' designation indicates the C tolerance grade in a SOT-23 package.

Replacement Considerations

LM4040CEM3-8.2/NOPB