LM4040CIX3-3.0

Overview

The LM4040CIX3-3.0 is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 3.0 V with an initial accuracy of 0.5%. The device operates within an industrial temperature range from -40°C to +125°C and features a maximum temperature coefficient of 70 ppm/°C. It utilizes a SC-70-3 (SOT-323) surface-mount package. Key electrical parameters include a maximum shunt current of 15 mA and a minimum operating current of 60 µA.

Feature Summary

• Provides stable fixed output voltage across the industrial temperature range
• Designed for space-constrained applications via compact SMD packaging
• Supports operation with capacitive loads without instability

Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring precise voltage references
• Microprocessor supply monitoring circuits

Procurement Notes

Verify the specific suffix 'IX3' against official manufacturer documentation to confirm the SC-70-3 package designation and tape-and-reel configuration. Ensure the order matches the required 0.5% accuracy grade ('C') and 3.0V nominal output. Cross-reference the RoHS compliance status with the latest datasheet revision, as manufacturing sources may vary between Maxim Integrated and Texas Instruments.

Selection Notes

Select this component when a low-cost, high-accuracy shunt reference is needed in a small footprint. The 0.5% tolerance suits general-purpose precision applications where tighter grades are unnecessary. Consider the 70 ppm/°C temperature coefficient for environments with significant thermal variation. Verify that the 60 µA minimum current requirement fits the system's quiescent power budget.

Part Context

The LM4040 series is a family of micropower shunt voltage references available in multiple accuracy grades and output voltages. The 'C' suffix denotes 0.5% initial accuracy, while 'IX3' typically indicates the SC-70-3 package variant. This part belongs to the broader PMIC category, serving as a critical reference element in analog signal chains and power management subsystems.

Replacement Considerations

LM4040CIM3-3.0+T: Equivalent shunt reference with identical 3.0V output and 0.5% accuracy but housed in a SOT-23-3 package instead of SC-70-3.