LM4128BQ1MF4.1/NOPB

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Analog and mixed-signal applications require highly accurate levels that can lay the groundwork for reliable and effective circuit performance. Voltage references fill in this necessary role, providing an accurate reference voltage over a wide range of voltage inputs and temperatures. The LM4128BQ1MF4.1/NOPB is a precision voltage reference IC ideal for use in these applications, employing an advanced bandgap reference technology. This article will examine the application field and working principle of theLM4128BQ1MF4.1/NOPB.

Application Field of the LM4128BQ1MF4.1/NOPB

The LM4128BQ1MF4.1/NOPB is a precision voltage reference designed to generate an accurate voltage reference over a range of voltages, processes and temperatures. The LM4128BQ1MF4.1/NOPB is ideal for demanding analog and mixed-signal applications, including signal conditioning circuits, RF signal processing, precision power management and automotive systems. Applications in medical, consumer, and industrial instrumentation also benefit from the LM4128BQ1MF4.1/NOPB’s accuracy and reliability.

The LM4128BQ1MF4.1/NOPB provides the precision and accuracy required for today’s highly integrated and demanding designs. The LM4128BQ1MF4.1/NOPB includes a trimmed bandgap reference with a temperature coefficient of 0.2mV/°C, meaning it maintains its accuracy over an extended temperature range. The PNP-based output stage achieves excellent noise immunity and reduces power supply noise. In addition, its low output impedance minimizes load-induced errors and its flatness over temperature is a key advantage over conventional reference ICs.

Working Principle of the LM4128BQ1MF4.1/NOPB

The LM4128BQ1MF4.1/NOPB’s core is a bandgap reference. A bandgap reference is a semiconductor circuit that generates a relatively stable voltage regardless of input voltage, process, or temperature variations. The circuit utilizes two transistors, an NPN and a PNP, as two legs of a Wheatstone bridge circuit. The transistors have different emitter areas, meaning that the voltage drop across the NPN side is lower than the voltage drop across the PNP side. This difference creates a voltage drop across the bridge. This voltage drop is independent of temperature and process variations and is used to generate a reference voltage.

The output of the bridge is then trimmed and amplified to generate an accurate reference voltage. The LM4128BQ1MF4.1/NOPB’s output stage utilizes a PNP transistor to achieve excellent noise immunity and reduce power supply noise. The LM4128BQ1MF4.1/NOPB’s designed to output a reference voltage of 4.1V, but is adjustable with an external resistor and can output a reference voltage from 4.1V to 7.1V.

Conclusion

The LM4128BQ1MF4.1/NOPB is a precision voltage reference IC ideal for demanding mixed-signal, analog, and RF signal processing applications. The LM4128BQ1MF4.1/NOPB is a bandgap reference IC, utilizing a trimmed bandgap reference with a temperature coefficient of 0.2mV/°C and a PNP-based output stage to improve noise immunity and reduce power supply noise. The LM4128BQ1MF4.1/NOPB is adjustable with an external resistor and can output a reference voltage from 4.1V to 7.1V.

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