LM4140ACM-1.2/NOPB

Voltage Reference Overview

The LM4140ACM-1.2/NOPB is a micropower low-dropout voltage reference manufactured by Texas Instruments, housed in an SOIC-8 package. It provides a fixed output voltage of 1.25 V with an initial accuracy of 0.1%. The device features a temperature coefficient of 6 ppm/°C and operates within a junction temperature range of 0°C to +70°C. Key electrical specifications include a maximum input voltage of 5.6 V, a maximum shunt current of 8 mA, and a typical operating supply current of 230 µA.

Voltage Reference Feature Summary

• Micropower operation with low quiescent current consumption suitable for battery-powered applications
• Low noise performance designed to minimize signal interference in precision circuits
• Low dropout capability allowing efficient regulation with minimal input-to-output voltage difference

Voltage Reference Applications

• Precision data acquisition systems requiring stable voltage references
• Portable instrumentation powered by battery sources
• High-resolution analog-to-digital converter (ADC) reference inputs

Voltage Reference Procurement Notes

Verify the specific suffix NOPB indicates lead-free and RoHS compliance status according to the manufacturer's latest documentation. Confirm the SOIC-8 package dimensions match your PCB footprint requirements. Ensure the 0°C to +70°C commercial temperature range aligns with your system's operational environment constraints before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a fixed 1.25 V reference is required with high initial accuracy. The low operating current makes it suitable for power-sensitive designs compared to higher current alternatives. Consider the SOIC-8 package availability and thermal characteristics relative to other available packages in the LM4140 series for your specific layout needs.

Voltage Reference Part Context

This part belongs to the LM4140 family of micropower low-dropout voltage references from Texas Instruments. The family offers various fixed output voltages and accuracy grades. The ACM-1.2 variant specifically denotes the A-grade accuracy and 1.25 V output option within the SOIC-8 surface-mount package lineup.

Voltage Reference Replacement Considerations

LM4140BCM-1.2 is a compatible alternative within the same series offering similar electrical characteristics and pinout compatibility.