LM4040CIM3X-3.0

Overview

The LM4040CIM3X-3.0/NOPB is a precision micropower shunt voltage reference by Texas Instruments, housed in a surface-mount SOT-23-3 package. It provides a fixed output voltage of 3.0 V with an initial accuracy of ±1%. The device operates within a temperature range of -40°C to +85°C and features a temperature coefficient of 150 ppm/°C. Key electrical parameters include a maximum cathode current of 15 mA, a minimum operating current of 70 µA, and a noise level of 35 µVrms from 10 Hz to 10 kHz. It is designed for applications requiring stable voltage references in space-constrained environments.

Feature Summary

• Provides a fixed 3.0 V reference voltage with high precision
• Operates as a shunt regulator with low quiescent current consumption
• Utilizes a compact SOT-23-3 surface-mount package for board space efficiency

Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Microcontroller supply monitoring

Procurement Notes

Verify the specific suffix (e.g., NOPB) against the manufacturer's official ordering guide to ensure compliance with RoHS standards and lead-free requirements. Confirm that the SOT-23-3 package variant matches the intended PCB footprint. Cross-reference the temperature grade and accuracy class with the system design specifications before finalizing procurement orders.

Selection Notes

Select this component when a fixed 3.0 V reference is required with moderate precision and low power consumption. Ensure the circuit design accommodates the minimum operating current of 70 µA to maintain regulation. Consider the 150 ppm/°C temperature coefficient for thermal stability requirements. Verify that the 15 mA maximum cathode current rating aligns with the available bias current in the application circuit.

Part Context

This part belongs to the LM4040-N series of precision micropower shunt voltage references. The series offers various fixed voltage options and accuracy grades, all sharing a common low-power architecture and compact SOT-23 form factor. It serves as a cost-effective solution for general-purpose voltage referencing tasks where ultra-low noise or automotive qualification is not strictly mandated.

Replacement Considerations

LM4040DIM3X-3.0/NOPB: Offers identical voltage and package but with ±1% accuracy and 150 ppm/°C tempco, matching this part's specs.