LMV431CZ/NOPB

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Voltage references are essential components in power management integrated circuits (PMICs). The LMV431CZ/NOPB is a precision voltage reference from Texas Instruments that is designed for high accuracy and minimal power dissipation in space-constrained applications. It is commonly used in battery-powered, portable, and automotive systems. Let’s investigate its application field and working principle in more detail.

Application Field

The LMV431CZ/NOPB is ideal for high-precision voltage reference applications. It provides 1.2V to 5.0V voltage options and comes in several operating temperature ranges[1]. Moreover, this device can operate from a wide input voltage range of between 4.75V and 42V. Other features of this device include very low temperature drift and accurate fixed output voltage options.

The LMV431CZ/NOPB is commonly used in battery-powered, portable, and automotive systems. It is frequently found in battery-powered applications such as mobile phones, portable medical devices, and tablets, due to its minimal power drain. Additionally, its low temperature drift ensures accurate performance in a variety of environmental conditions. It is also used in automotive applications, since it can operate from a wide input voltage range and withstand severe temperature fluctuations. Furthermore, it is suitable for applications where a precision reference voltage is required, due to its low temperature drift and high accuracy.

Working Principle

The LMV431CZ/NOPB is a precision, low-dropout, zero-drift voltage reference. It is composed of an op-amp, a voltage reference, a Schmitt trigger, and additional circuits. The voltage reference is a type of circuit that provides a fixed voltage reference value, regardless of changes in temperature, current, and supply voltage. This is enabled by its high-precision voltage reference, which uses a bandgap reference element[2].

The op-amp acts as a comparator and ensures that the output voltage is within the set limits of the voltage reference. Its Schmitt trigger acts as a hysteresis comparator, which is used to eliminate noise from the output voltage. It is also able to maintain its voltage accurately over a range of temperatures and supply voltages. Additionally, the device is protected against reverse-polarity voltages by its back-to-back diode.

In summary, the LMV431CZ/NOPB is a precision voltage reference suitable for high-precision applications. It is highly accurate and features a minimal power drain and wide input voltage range. It is commonly used in battery-powered, portable, and automotive systems due to its low temperature drift and high accuracy. The device is composed of an op-amp, a voltage reference, a Schmitt trigger, and additional circuits, which enable the device to provide a fixed voltage reference value regardless of changes in temperature, current, and supply voltage.

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