LM4140CCMX-1.0

Voltage Reference Overview

The LM4140CCMX-1.0 is a precision micropower low-dropout series voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.024 V with an initial accuracy of 0.1% and a temperature coefficient of 3 ppm/°C. The device operates within an input voltage range up to 5.6 V and supports a maximum shunt current of 8 mA. It functions in an ambient temperature range from 0°C to +70°C and consumes approximately 230 µA to 265 µA of supply current. The component is housed in an 8-SOIC surface-mount package.

Voltage Reference Feature Summary

• Features a built-in enable pin for power management control
• Delivers high precision with 0.1% initial accuracy and low temperature drift
• Designed as a micropower solution with low quiescent current consumption

Voltage Reference Applications

• Portable instrumentation requiring stable reference voltages
• Battery-powered measurement systems
• Data acquisition systems needing precise analog references

Voltage Reference Procurement Notes

Verify the specific suffix 'CMX' indicates tape-and-reel packaging rather than tube, as this affects handling and storage requirements. Confirm the 'NOPB' designation ensures lead-free compliance and RoHS adherence. Cross-reference the manufacturer part number with official Texas Instruments documentation to ensure compatibility with your design specifications before procurement.

Voltage Reference Selection Notes

Select this component when a fixed 1.024 V reference is required with tight tolerance and low power consumption. The SOIC-8 package suits space-constrained surface-mount designs. Ensure the application environment stays within the 0°C to +70°C operating range. Consider the enable pin functionality if system power sequencing requires controlled reference activation.

Voltage Reference Part Context

This part belongs to the LM4140 family of precision voltage references from Texas Instruments. The family includes various output voltages and packages, such as the LM4140ACM-1.0/NOPB in tube packaging. The LM4140 series is characterized by its low dropout voltage and micropower operation, making it suitable for battery-operated applications where efficiency and accuracy are critical.

Voltage Reference Replacement Considerations

The LM4140ACM-1.0/NOPB offers identical electrical performance but differs in packaging format (tube vs. tape-and-reel). Verify that the alternative package type aligns with your PCB assembly capabilities and inventory handling processes.