LM4140ACMX-2.0/NOPB

Voltage Reference Overview

The LM4140ACMX-2.0/NOPB is a micropower low-dropout series voltage reference manufactured by Texas Instruments, housed in an SOT-23 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 6 ppm/°C and supports a maximum input voltage of 5.6 V. It operates within a junction current range up to 8 mA and functions across a temperature range of -40°C to +85°C.

Voltage Reference Feature Summary

• Micropower low-dropout series architecture for efficient operation
• High precision with 0.1% initial accuracy and 6 ppm/°C temperature coefficient
• Integrated enable pin for power management control

Voltage Reference Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered measurement systems
• Data acquisition systems

Voltage Reference Procurement Notes

Verify the specific suffix 'CMX' indicates the SOT-23 package variant distinct from the SOIC-8 'CCM' or 'ACM' versions. Confirm the 'NOPB' designation ensures lead-free compliance and RoHS adherence as per Texas Instruments standards. Cross-reference the exact part number against official distributors to ensure availability of this specific trim and package combination.

Voltage Reference Selection Notes

Select this component when a compact SOT-23 footprint is required alongside high precision (0.1%) and low temperature drift (6 ppm/°C). It is suitable for applications needing an enable function and micropower consumption. Ensure the design accommodates the 5.6 V maximum input voltage limit and the specific thermal characteristics of the small outline transistor package.

Voltage Reference Part Context

This part belongs to the LM4140 family of precision micropower shunt and series voltage references. Unlike the shunt-type LM4040, the LM4140 offers a series configuration with an enable pin, providing better efficiency in battery-operated devices. The AC grade specifies the tighter 0.1% accuracy and 6 ppm/°C stability compared to standard grades.

Voltage Reference Replacement Considerations

LM4140ACM-2.0/NOPB (SOIC-8 package equivalent)

Voltage Reference FAQ

What is the difference between the LM4140ACMX and LM4140ACM variants?

The primary difference is the package type; the 'CMX' suffix denotes the SOT-23 surface-mount package, while 'CM' typically refers to the SOIC-8 package.

Does the LM4140ACMX-2.0/NOPB include an enable feature?

Yes, the LM4140 series includes an integrated enable pin, allowing the user to shut down the reference to save power.