LM4128CQ1MF1.8/NOPB

Voltage Reference Overview

The LM4128CQ1MF1.8/NOPB is an automotive-grade series voltage reference IC manufactured by Texas Instruments, housed in a SOT-23-5 surface-mount package. It provides a fixed output voltage of 1.8 V with an initial accuracy of ±0.5%. The device operates within a junction temperature range of -40°C to +125°C and supports a maximum input voltage of 6 V. Key electrical specifications include a maximum shunt current of 20 mA, a supply current of 100 µA, and a temperature coefficient of 100 ppm/°C. It meets AEC-Q100 qualification standards for automotive applications.

Voltage Reference Feature Summary

• Automotive-grade reliability certified under the AEC-Q100 standard
• Precision series voltage reference architecture ensuring stable output
• Low power consumption suitable for battery-operated systems

Voltage Reference Applications

• Automotive electronic control units requiring precise voltage references
• Data acquisition systems in vehicle environments
• Analog-to-digital converter reference inputs

Voltage Reference Procurement Notes

Verify that the specific suffix CQ1 corresponds to the required ±0.5% accuracy grade and automotive qualification level. Confirm the 1.8 V output voltage matches the system design requirements. Ensure the SOT-23-5 package footprint aligns with the PCB layout. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Voltage Reference Selection Notes

Select this component when an automotive-certified voltage reference with moderate precision (±0.5%) is required. It is suitable for applications where the 1.8 V output is needed and the 100 ppm/°C temperature coefficient is acceptable. Consider alternative grades such as AMFX or DMFX variants if tighter initial accuracy or lower noise performance is necessary for the specific circuit design.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower series voltage references from Texas Instruments. The 'C' designation indicates the ±0.5% initial accuracy grade, while 'Q1' signifies automotive qualification. The 'MF' suffix denotes the SOT-23-5 package type. This family offers a balance of low power consumption and high stability for various industrial and automotive sensing applications.

Voltage Reference Replacement Considerations

LM4128AMFX1.8/NOPB: Offers higher accuracy (±0.1%) but same package and automotive grade. LM4128DMFX1.8/NOPB: Provides ±1% accuracy, potentially lower cost, same package. LM4128AQ1MF1.8/NOPB: Same accuracy grade (±0.1%) but different tolerance specification.