LM4128DMFX-1.8

Noise - 0.1Hz to 10Hz:	170µVp-p
Base Part Number:	LM4128
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Current - Supply:	100µA
Voltage - Input:	2.2 V ~ 5.5 V
Noise - 10Hz to 10kHz:	--
Series:	--
Temperature Coefficient:	100ppm/°C
Tolerance:	±1%
Current - Output:	20mA
Voltage - Output (Min/Fixed):	1.8V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The LM4128DMFX-1.8 is a Voltage Reference from the PMIC – Voltage Reference category. It is a high-performance, ultra-low-noise series of voltage references designed for applications requiring low voltage noise and high stability. They feature high accuracy over temperature, supply voltage and line regulation and low initial and long-term stability errors. This product is specifically designed for use in power management, digital control systems and measurement applications.

Application Field

The LM4128DMFX-1.8 is a popular choice for many applications in power management, digital control systems and measurement applications. It can be used in automotive, communication and consumer electronics, computer and peripherals, industrial, digital systems and portable devices, audio and video applications.The LM4128DMFX-1.8 is ideal for applications where accurate output voltage control is critical, including:• Power supply designs requiring high performance• Portable device designs requiring a low-noise power supply• Automotive and industrial applications such as engines and industrial controllers• Digital systems with high-accuracy data acquisition• Industrial system control applications

Working Principle

The LM4128DMFX-1.8 operates by employing the bandgap reference technique in which two levels of voltage are made to balance each other. This is achieved by applying a transistor, a resistor and two diodes in a special configuration to keep the voltage difference at a constant level.The voltage reference includes an active-bandgap circuit and a precision levelshift circuitry. The active-bandgap circuit ensures that the output voltage is kept stable with temperature, supply voltage and time. The precision levelshift circuitry adjusts the output voltage to the desired level when the output voltage is lower than the reference voltage Vref.

Conclusion

The LM4128DMFX-1.8 is a Voltage Reference from the PMIC – Voltage Reference category. It is a high-performance, ultra-low-noise series of voltage references designed for applications requiring low voltage noise and high stability. The LM4128DMFX-1.8 is suitable for a wide range of applications in power management, digital control systems and measurement applications. It employs the bandgap reference technique to keep the output voltage stable with temperature, supply voltage and time. The precision levelshift circuitry adjusts the output voltage to the desired level.

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