LM4040CIZ-10.0

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Modern electronics markets need precision and reliable voltage references for a vast range of applications, and LM4040CIZ-10.0 is a perfect example of why integrated circuits (ICs) are so widely used today. With its comprehensive functions and extensive application capabilities, it is widely used in PMIC – Voltage Reference. In this article, we will discuss the LM4040CIZ-10.0’s application field and working principle.

Overview of LM4040CIZ-10.0

The LM4040CIZ-10.0 is a small form factor, low-power and low-noise precision shunt voltage reference. It offers a 10.0V single-string reference output voltage, a typical 10ppm/°C temperature coefficient, and excellent load regulation and line regulation. Furthermore, its low power consumption makes it ideal for use in portable applications, photovoltaic arrays, or other low-power systems.

Features

The LM4040CIZ-10.0 is a versatile precision shunt voltage reference. Its key features include:

• Wide operating temperature range: -40 to +125°C
• Low-noise reference output: 900nV RMS , 0.1 Hz to 10 Hz
• High efficiency, allowing it to run on as low as 200mV of input voltage
• Low power consumption of only 100µA
• High load regulation for up to 1.5A of output current
• Excellent line regulation, maintaining accuracy across a wide input range
• Very low current temperature coefficient of only 10ppm/°C
• High temperature stability; temperature coefficient of 0.2mV/°C
• Small form factor, allowing for easy integration into compact devices
• Good stability over time; aging rate of less than 0.05% per 1000 hours
• Built-in ESD protection

Application fields

The LM4040CIZ-10.0 is a versatile precision shunt voltage reference, and it is well-suited for a variety of applications, including:

• Instrumentation and control systems
• Portable and wearable applications
• Battery-operated and solar-powered applications
• Real-time clocks and test equipment
• Automotive and mobile phone applications
• Computer peripheral accessories
• Audio/video equipment
• Proportional-integral-derivative (PID) controllers

Working principle

The LM4040CIZ-10.0 works like any other voltage reference IC. Its primary components consist of a precision bandgap reference, a precision amplifier, and a precision resistor ladder. The bandgap reference ensures a stable voltage reference, while the amplifier and resistor ladder ensure accurate current-to-voltage conversion. The reference voltage is then output from the device and can be compared to a reference voltage for calibration of circuits.

The output voltage of the LM4040CIZ-10.0 is also adjustable, making it ideal for applications where the reference voltage needs to be adjusted for different components or systems. This is achieved through the use of a trim resistor connected to the adjusting pin. The trim resistor is externally adjustable and allows the reference voltage to be adjusted to the exact desired value.

In addition to its adjustable nature, the LM4040CIZ-10.0 also has exceptional power and temperature stability. Its low power consumption of only 200µA and high temperature coefficient of 0.2mV/°C ensure reliable operation over a wide range of operating conditions.

Conclusion

The LM4040CIZ-10.0 is a versatile and reliable voltage reference IC, and is well-suited for a variety of applications. Its low power consumption, wide operating temperature range, and excellent line and load regulation make it ideal for use in portable applications, photovoltaic arrays, and other low-power systems. Furthermore, its adjustable nature and excellent temperature stability make it a top choice for precision voltage reference applications.

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