LM4140ACM-2.0

Voltage Reference Overview

The LM4140ACM-2.0/NOPB is a micropower low-dropout series voltage reference manufactured by Texas Instruments, housed in an SOIC-8 package. It provides a fixed output voltage of 2.048 V with an initial accuracy of 0.1%. The device features a temperature coefficient of 10 ppm/°C and supports a maximum input voltage of 5.6 V. It operates within a temperature range of 0°C to +70°C, drawing a typical supply current of 230 µA.

Voltage Reference Feature Summary

• Micropower operation with low quiescent current consumption suitable for battery-powered applications
• Low-dropout performance allowing stable regulation with minimal input-to-output voltage difference
• High precision with tight initial accuracy and low temperature drift characteristics

Voltage Reference Applications

• Precision analog-to-digital converter (ADC) references
• Data acquisition systems requiring stable voltage sources
• Portable instrumentation powered by batteries

Voltage Reference Procurement Notes

Verify the specific suffix designation to confirm the exact output voltage and tolerance grade. Ensure the package type matches the PCB footprint requirements. Confirm RoHS compliance status if required by project specifications. Check the operating temperature range against environmental conditions. Validate the manufacturer part number against official Texas Instruments documentation before ordering.

Voltage Reference Selection Notes

Select this component when a fixed 2.048 V reference with 0.1% accuracy is required. Consider the 10 ppm/°C temperature coefficient for thermal stability needs. Evaluate the 230 µA supply current against power budget constraints. Ensure the input voltage remains below the 5.6 V maximum limit. Verify that the SOIC-8 package fits the available board space.

Voltage Reference Part Context

This part belongs to the LM4140 family of precision micropower voltage references from Texas Instruments. The family offers various fixed output voltages and accuracy grades. The LM4140 series is designed for applications demanding high stability and low power consumption in compact surface-mount packages.

Voltage Reference Replacement Considerations

LM4140ACM-2.0/NOPB serves as a direct replacement for older National Semiconductor versions with identical electrical specifications and pinout compatibility.