LM4040A25IDCKR

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Introduction: LM4040A25IDCKR

LM4040A25IDCKR is a voltage reference device which provides a stable output voltage in the range of 2.5V or 4V ±2.5mV over temperature and line changes. It is a small size automotive-qualified shunt mode current-sense voltage reference that provides accurate, low current and low drift operation with low thermal EMF. The external components can be readily implemented on a single printed circuit board (PCB) for high reliability systems in automotive applications. The LM4040A25IDCKR can be operated on the same board with other discrete components and integrated circuits (ICs). For example, when using the LM4040A25IDCKR in combination with an IC, all pins of the reference except the voltage sense pin will stay at a ground potential.

Application fields:

The LM4040A25IDCKR is used in a wide range of applications, including automotive applications such as management of alternator or fuel injection systems; temperature compensation of precision temperature sensors; temperature stabilized power supplies; variable temperature dependent voltage reference; supply voltage regulation; and monitoring of power sequencing events in high voltage systems. Due to their high accuracy, current-sense and low power consumption, the LM4040A25IDCKR is also used in high volume consumer and industrial applications that require precision voltage regulation.

Working principle:

The LM4040A25IDCKR operates in a shunt mode, delivering a precise and constant current through an external shunt resistor. The voltage drop across the shunt (the sense voltage) is proportional to the current through the shunt, and can be used as a reference voltage. The sense voltage is internally regulated and buffered, eliminating the need for external regulation or buffering. The LM4040A25IDCKR devices feature an axial leaded package, which allows for improved thermal characteristics and layout flexibility.

The internal shunt resistor of the LM4040A25IDCKR has a very low temperature coefficient, providing a unique combination of accuracy and stability. By integrating the shunt resistor into the package, the LM4040A25IDCKR eliminates the need for an external resistor and allows for cost-effective and space-efficient designs. The LM4040A25IDCKR offers a fast and accurate output regulation, making it well suited for applications that require a stable output voltage over line and temperature variations.

The LM4040A25IDCKR is designed to reduce power consumption, making it suitable for battery-powered applications. In addition, the LM4040A25IDCKR operates with a low quiescent current, allowing for improved accuracy and lower power consumption.

The LM4040A25IDCKR is an excellent choice for incorporating into high-resolution, high accuracy sensing, monitoring, and control systems due to its low noise and low temperature drift. It also offers a wide operating temperature range and a high precision voltage reference.

Conclusion:

The LM4040A25IDCKR is an automotive-qualified voltage reference device that provides accurate, low current and low drift operation with low thermal EMF. It offers a fast and accurate output regulation and can be used in a wide range of applications, including automotive, consumer and industrial applications. The LM4040A25IDCKR is designed to reduce power consumption, making it suitable for battery-powered applications, and also offers a wide operating temperature range for high precision voltage reference.

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