LM4140ACMX-4.1/NOPB

Voltage Reference Overview

The LM4140ACMX-4.1/NOPB is a micropower low-dropout series voltage reference manufactured by Texas Instruments, housed in an SOT-23 package. It provides a nominal output voltage of 4.096 V with an initial accuracy of 0.1%. The device features a temperature coefficient of 6 PPM/°C and supports a maximum shunt current of 8 mA. It operates within a supply voltage range up to 5.6 V and functions across a temperature range from -40°C to +85°C.

Voltage Reference Feature Summary

• Micropower operation for battery-powered applications
• Low dropout capability for efficient power usage
• High precision with 0.1% initial accuracy
• Integrated enable pin for power management

Voltage Reference Applications

• Portable instrumentation systems
• Battery-powered measurement devices
• Data acquisition systems requiring stable references
• Precision analog front-end circuits

Voltage Reference Procurement Notes

Verify the specific suffix 'CMX' indicates the SOT-23 package variant distinct from the SOIC version. Confirm RoHS compliance status as indicated by the NOPB designation. Ensure the operating temperature range meets the application requirements of -40°C to +85°C. Cross-reference the datasheet for electrical characteristics specific to the 4.1V output version.

Voltage Reference Selection Notes

Select this component when a compact SOT-23 footprint is required alongside high precision. Compare against the LM4140ACM variant if a larger SOIC package is acceptable for better thermal performance. Consider the 6 PPM/°C temperature coefficient for stability needs. Verify input voltage constraints do not exceed the 5.6 V maximum rating.

Voltage Reference Part Context

This part belongs to the LM4140 family of precision micropower voltage references. It shares core specifications with other variants like the LM4140BCM-4.1 but differs in packaging and potentially thermal characteristics due to the SOT-23 form factor. The family is designed for applications requiring low noise and high stability in small spaces.

Voltage Reference Replacement Considerations

LM4140BCM-4.1/NOPB offers similar electrical performance in an SOIC-8 package. LM4140ACM-4.1/NOPB provides the same specs in a standard SOIC-8. Check pin compatibility and thermal dissipation requirements when substituting between SOT-23 and SOIC packages.