LM4140ACM-2.5

Voltage Reference Overview

The LM4140ACM-2.5/NOPB is a precision micropower low-dropout series voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 2.5 V with an initial accuracy of 0.1% and a temperature coefficient of 3 ppm/°C. The device operates within a supply voltage range up to 5.6 V and draws a typical quiescent current of 265 µA. It is housed in an 8-pin SOIC package and supports an operating temperature range from 0°C to +70°C.

Voltage Reference Feature Summary

• Features a low-dropout architecture for efficient operation with minimal input-to-output voltage differential.
• Incorporates an enable pin to control power consumption during inactive periods.
• Delivers high precision stability through a low temperature coefficient specification.

Voltage Reference Applications

• Precision analog-to-digital converter (ADC) reference sources
• Data acquisition systems requiring stable voltage baselines
• Battery-powered instrumentation circuits

Voltage Reference Procurement Notes

Verify the specific suffix designation, such as /NOPB, to confirm lead-free compliance and exact electrical tolerances. Ensure the selected variant matches the required package type and operating temperature range for your specific application environment before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a fixed 2.5 V reference with high accuracy is required in a surface-mount format. Consider the 265 µA quiescent current and 5.6 V maximum input voltage limits against system power budgets and available supply rails.

Voltage Reference Part Context

This part belongs to the LM4140 series of micropower shunt references. It shares architectural similarities with other members like the LM4140BCM variants but differs in output voltage and package configuration. The series is designed for applications demanding low noise and high stability in compact designs.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4140 family members with compatible voltages, such as the LM4140ACM-4.1 or LM4140ACM-1.2, provided the output voltage requirement aligns. Verify pin compatibility and thermal characteristics when cross-referencing.