LM4140ACMX-4.1

Voltage Reference Overview

The LM4140ACMX-4.1 is a micropower low-dropout series voltage reference manufactured by Texas Instruments, providing a fixed output of 4.1V. It features an initial accuracy of 0.1% and a temperature coefficient of 3 ppm/°C. The device operates within a supply voltage range up to 5.6V with a maximum shunt current of 8mA. Designed for surface-mount applications, it utilizes an SOT-23 package and functions reliably across a temperature range of 0°C to +70°C.

Voltage Reference Feature Summary

• Micropower operation with low quiescent current consumption
• Low dropout capability for efficient power management
• High precision with 0.1% initial accuracy and 3 ppm/°C temperature stability

Voltage Reference Applications

• Portable instrumentation requiring stable reference voltages
• Battery-powered measurement systems
• Data acquisition systems needing high accuracy

Voltage Reference Procurement Notes

Verify the specific suffix 'CMX' against official Texas Instruments documentation to confirm the exact tape-and-reel packaging configuration and temperature grade. Ensure compatibility with standard SOT-23 footprints during PCB layout. Cross-reference datasheet revisions to validate electrical characteristics match design requirements.

Voltage Reference Selection Notes

Select this component when a compact SOT-23 form factor is required alongside high precision. Compare performance against the LM4040 series if shunt topology is acceptable. Verify input voltage constraints do not exceed the 5.6V maximum rating under all operating conditions.

Voltage Reference Part Context

This part belongs to the LM4140 family of precision micropower voltage references. It serves as a series regulator variant, distinct from shunt references like the LM4040. The family emphasizes low noise and stability for sensitive analog circuits.

Voltage Reference Replacement Considerations

LM4140AIM3X-4.1/NOPB: Extended temperature range (-40°C to +85°C). LM4140BIM3X-4.1/NOPB: Higher precision (0.05%). Verify pinout compatibility before substitution.