ISL21009CFB841Z

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Voltage references are circuit components that are used to give an accurate and stable reference voltage. The ISL21009CFB841Z voltage reference is a high precision device that can be used as a point-of-load (POL) reference in a variety of power supply, voltage regulators and analog/ digital signal processing applications. It is a fixed voltage reference with a bandgap amplifier integrated onto a CMOS IC.

General Features

The ISL21009CFB841Z voltage reference includes the following features:

• Simple two-terminal bandgap reference.
• Wide voltage range: Up to 4 volts.
• Low quiescent current: As low as 15μA at 5V.
• High temperature stability: 0.03%/°C temperature coefficient.
• Wide operational frequencies: Up to 500kHz.
• Low noise output: 40µV rms.

Application Fields

The ISL21009CFB841Z voltage reference is designed to provide a stable and accurate reference voltage in a variety of applications. These applications include:

• Power supplies: Used as a point-of-load reference, the ISL21009CFB841Z voltage reference can provide a stable reference voltage to regulate the input voltage of a power supply.
• Voltage regulators: Used as a reference output, the ISL21009CFB841Z voltage reference can provide a stable reference voltage for voltage regulators.
• Analog and digital signal processing: Used as a reference to generate a reference voltage for analog and digital signal processing.

Working Principle

The ISL21009CFB841Z voltage reference uses a Band-Gap amplifier for accuracy and stability. A band-gap amplifier is a type of amplifier that uses the effect of temperature-dependent voltage differences to produce a voltage output that is independent of the temperature of the environment the reference is used in.

The ISL21009CFB841Z voltage reference consists of a series of transistors which are biased by the reference voltage. As the temperature changes, the biasing of the transistors changes, resulting in a temperature-independent voltage output. This temperature-independent voltage output is then buffered by an amplifier circuit to improve the accuracy of the output voltage.

Conclusion

The ISL21009CFB841Z voltage reference is a high precision device that is designed for use as an accurate and stable reference voltage in a variety of applications. The device uses a Band-Gap amplifier for accuracy and stability and is suitable for use in power supplies, voltage regulators and analog/digital signal processing applications.

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