ADR291GRUZ

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ADR291GRUZ is a low-dropout, low-noise voltage reference with a three-terminal configuration, which is classified as a PMIC (Power Management IC) - Voltage Reference. It features excellent accuracy and stability over temperature, as well as high immunity to noise from the power supply or environment.

The ADR291GRUZ operates from a 2.7V~9.4V input voltage, and produces a stable 2.5V reference voltage. Additionally, the device provides an output current of 2.5mA. As such, it is ideally suited for general-purpose applications such as telecommunication, medical and industrial equipment.

In terms of its working principle, the output voltage of the device is externally determined by an external resistor. The resistor should be connected between the OUT and SET pins. Furthermore, the SET pin must be connected to the ground in order to ensure the accuracy of the output voltage.

The output of the ADR291GRUZ consists of two sections: feedback and control. The feedback loop consists of an error amplifier, a reference voltage region and a pass element. The output of the error amplifier is compared with an input voltage that is set by the reserved external resistor. If these two measurements differ, the error amplifier then controls the output voltage by adjusting the gate voltage of the pass element.

Furthermore, the control loop of the device consists of two parts: a thermistor for temperature compensation and an adjustable constant current source for current compensation. The thermistor operates as a temperature compensator, which provides a stable output voltage across a range of temperatures. The adjustable current source provides a constant current to the output in order to reduce the output voltage variation with changing power supply conditions.

To sum up, the ADR291GRUZ is a low-dropout, low-noise voltage reference with a three-terminal configuration, specifically designed for general-purpose applications such as telecommunication, medical and industrial equipment. It operates from a 2.7V~9.4V input voltage and produces a stable 2.5V reference voltage. Additionally, it provides an output current of 2.5mA. Furthermore, the output of the device is externally determined by an external resistor, while current and temperature compensation are provided by the control loop.

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