LM4051CEM3X-ADJ/NOPB

Voltage Reference Overview

The LM4051CEM3X-ADJ/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments. It operates within an output voltage range of 1.24 V to 10 V and features an initial accuracy of 1%. The device exhibits a temperature coefficient of 97 ppm/°C, with a maximum input voltage of 10 V and a maximum cathode current of 12 mA. It supports a minimum operating temperature of -40°C and a maximum of +85°C. Packaged in a SOT-23-3 surface-mount case, it belongs to the LM4051 series and is RoHS compliant.

Voltage Reference Feature Summary

• Provides stable reference voltage through adjustable shunt regulation architecture
• Maintains high precision with low initial accuracy deviation across operating conditions
• Designed for micropower applications with minimal quiescent current consumption
• Ensures thermal stability via controlled temperature coefficient characteristics

Voltage Reference Applications

• Portable battery-powered instrumentation requiring low power consumption
• Data acquisition systems needing precise voltage references
• Microcontroller analog-to-digital converter reference inputs
• Battery monitoring circuits for accurate state-of-charge estimation

Voltage Reference Procurement Notes

Verify the complete part number including suffixes such as NOPB and package designation against official Texas Instruments documentation. Confirm that the specific revision matches project requirements. Check datasheet updates for any parameter changes. Ensure compatibility with existing PCB footprint and soldering profiles. Validate RoHS compliance status if required by regional regulations.

Voltage Reference Selection Notes

Select this component when an adjustable shunt reference is needed in a compact SOT-23-3 package. Consider the 1% initial accuracy and 97 ppm/°C temperature coefficient for circuit tolerance analysis. Evaluate the 12 mA maximum cathode current against load requirements. Compare performance against fixed-voltage alternatives if adjustment flexibility is not required. Assess power budget constraints given the micropower nature of the device.

Voltage Reference Part Context

This device is part of the LM4051 family of precision micropower shunt voltage references from Texas Instruments. The family includes both fixed and adjustable variants designed for space-constrained applications. The LM4051 series offers improved performance over older generations like the LM385, providing better accuracy and lower noise in a small outline transistor package suitable for automated assembly processes.

Voltage Reference Replacement Considerations

LM4051CEM3X-ADJ/NOPB may be replaced by LM4051AIM3X-ADJ/NOPB for higher accuracy requirements or LM4051BEM3X-ADJ/NOPB for standard precision needs. Verify pinout compatibility and thermal performance before substitution. Check datasheet specifications for temperature coefficient and accuracy differences.