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LM4041AIX3-1.2+T Application Field and Working Principle

In the field of PMIC - Voltage Reference, the LM4041AIX3-1.2+T provides shunt reference voltage which is accurate, stable and immune from temperature drift. The device offers an optimal combination of features within a low power, low cost 6-Pin SOT23 package. Therefore, the device can be used in a wide range of applications including precision measurement, power management, voltage control, operational amplifiers and current loop control.

Application Field

The LM4041AIX3-1.2+T provides an extremely stable voltage reference for microprocessor-based systems, instruments, and small portable devices. The device requires minimal external components, and provides excellent shunt reference accuracy with an output temperature coefficient of 2mV/°C. It is used in applications such as digital voltmeters, oscilloscopes, data acquisition systems, control systems, programmable logic devices and automotive systems. The device can also be used in supply regulation applications. Its low current consumption and low-cost package make it suitable for low-power applications such as battery-operated devices. Additionally, it is suitable for use in parallel with larger reference voltages for high-current applications.

Working Principle

The LM4041AIX3-1.2+T device consists of an integrated temperature compensated reference diode and an external resistor. The reference diode technology provides a dynamic temperature compensation which allows the device to maintain a low output voltage temperature coefficient. The reference voltage is obtained by connecting a resistor between the OUT and ADJ pins of the device.

The reference diode is clamped at the defined voltage which is then buffered and the voltage is held constant. The output voltage is set using the external resistor and the value is determined by the required accuracy from the device application. The temperature compensation feature ensures that the output voltage remains stable over a wide range of operating temperatures.

The device provides excellent load regulation and line regulation which allows it to be used in high accuracy applications. The LM4041AIX3-1.2+T is capable of delivering a maximum output current of 20mA which makes it ideal for low current load management applications. The device can also be used in current loop control circuits which require a very stable output voltage.

Conclusion

The LM4041AIX3-1.2+T is an excellent low cost device which is suitable for a wide range of applications. It offers excellent accuracy, line and load regulation and is capable of delivering a maximum output current of 20mA. The device is an ideal choice for high accuracy applications such as digital voltmeters, oscilloscopes, data acquisition systems, control systems, programmable logic devices and automotive systems.

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