LM4040CIM3-5.0

Overview

The LM4040CIM3-5.0 is a precision micropower shunt voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output voltage of 5.0 V with an initial accuracy of ±0.5%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 100 ppm/°C. It draws a typical operating current of 175 µA and supports a maximum shunt current of 15 mA. The component is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Provides stable reference voltage over industrial temperature ranges
• Ultra-low power consumption suitable for battery-operated designs
• High precision with low temperature drift characteristics

Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered measurement systems
• Data acquisition systems
• Handheld meters

Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix indicates the 5.0V output variant and SOT-23 package. Ensure the component meets RoHS compliance requirements if specified for the project. Check for lead-free status and verify the datasheet version matches the production batch specifications.

Selection Notes

Select this component when a fixed 5V reference with high accuracy is required in space-constrained applications. The SOT-23 package offers a small footprint ideal for portable devices. Consider the 100 ppm/°C temperature coefficient for environments with moderate thermal variations. The low quiescent current makes it suitable for power-sensitive designs compared to higher current alternatives.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references. The family includes various output voltages and accuracy grades. The CIM3 suffix denotes the commercial temperature grade and SOT-23-3 package type. This series is designed to replace older Zener diodes in precision applications requiring better stability and lower noise.

Replacement Considerations

LM4040DIM3X-5.0/NOPB: Higher accuracy grade (0.1%) with similar package and electrical characteristics.