LM4050QAEM3-2.5/NOPB

Voltage Reference Overview

The LM4050QAEM3-2.5/NOPB is a micropower shunt voltage reference manufactured by Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.1% and a temperature coefficient of 50 ppm/°C. The device operates within a junction temperature range of -40°C to +125°C and features a maximum cathode current of 15 mA. It consumes a typical quiescent current of 65 µA and exhibits low noise characteristics, specified at 41 µVrms between 10 Hz and 10 kHz. The component is housed in a compact SOT-23-3 surface-mount package.

Voltage Reference Feature Summary

• Automotive-grade reliability certified under the AEC-Q100 standard for robust performance in vehicle environments.
• High precision voltage regulation achieved through tight initial tolerance and stable temperature coefficient specifications.
• Ultra-low power consumption enabled by micropower design suitable for battery-operated systems.

Voltage Reference Applications

• Automotive electronic control units requiring precise voltage references
• Data acquisition systems utilizing analog-to-digital converters
• Portable instrumentation powered by limited energy sources

Voltage Reference Procurement Notes

Verify the specific suffix and full part number against official Texas Instruments documentation to ensure correct accuracy grade and automotive qualification status. Confirm RoHS compliance and packaging options such as cut tape or reel availability directly with authorized distributors. Check for any recent product change notifications that may affect pinout or electrical parameters before finalizing procurement decisions.

Voltage Reference Selection Notes

Select this component when high precision and automotive certification are required in a small footprint. The ±0.1% accuracy distinguishes it from lower-tolerance variants like the C or B series. Ensure the circuit design accommodates the 15 mA maximum cathode current limit and the specific thermal requirements for operation up to 125°C. Compare noise specifications against application needs if signal integrity is critical.

Voltage Reference Part Context

This part belongs to the LM4050 family of micropower shunt voltage references. The QAEM3 designation indicates the automotive quality grade, 2.5V output voltage, and SOT-23-3 package. It serves as a high-precision alternative to standard industrial versions, offering tighter tolerances suitable for demanding automotive and industrial measurement applications where stability and accuracy are paramount.

Voltage Reference Replacement Considerations

LM4050QBEM3-2.5/NOPB offers similar form factor but with ±0.2% accuracy. LM4050CEM3-2.5 provides ±0.5% accuracy for non-automotive use. Verify that substitute parts meet the specific AEC-Q100 qualification and temperature range requirements of the original design.

Voltage Reference FAQ

What is the noise specification of the LM4050QAEM3-2.5/NOPB?

The device has a noise specification of 41 µVrms measured over the frequency range of 10 Hz to 10 kHz.

Is this component qualified for automotive applications?

Yes, the LM4050QAEM3-2.5/NOPB is AEC-Q100 qualified, making it suitable for automotive electronic systems.