ADR540BKSZ-REEL7

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The ADR540BKSZ-REEL7 is a Precision Voltage Reference which belongs to the PMIC - Voltage Reference family of products. This precise voltage reference is a compact device which can operate from a single supply providing a regulated output voltage. Its low temperature coefficient and low-noise properties make it ideal for application in precise voltage and current sources, for ADCs and DACs, for analog conditioning circuits and for precise monolithic power supply systems.

The ADR540BKSZ-REEL7 is a cost-effective, accurate and precise device which can provide the needed output voltage regardless of the effect of temperature or the supply voltage. This precise voltage reference minimizes the effect of temperature on the output voltage due to its low temperature coefficient, typically 8 ppm/°C, and a good stability over time.

The ADR540BKSZ-REEL7 is available in an 8-lead PDIP or MSOP package and operates over a temperature range of -40°C to +125°C. , and it can draw a quiescent current of only 4.5 mA which makes it suitable for a wide variety of applications. The output voltage range is limited and can vary from 0.253 V to 13.1 V, with 0.1 % accuracy and 10 mg noise. The ADR540BKSZ-REEL7 device includes fast turn-on capability and a tight reference temperature coefficient.

The ADR540BKSZ-REEL7 can be used as an accurate and precise voltage reference for precision analog systems and for fast regulation of the output voltage. It is widely used in various systems including ADCs, DACs and power supplies which require a low temperature coefficient, good stability, low noise and low cost. This device can also be used as a reference voltage source in applications such as instrumentation, analog conditioning and communication systems, automotive systems and industrial systems.

The working principle relies on the behavior of a Zener diode and FET devices, a diode and a field effect transistor (FET). A Zener diode is a category of semiconductor devices with a highly reverse-biased junction which, unlike a normal diode, can handle a certain amount of reverse current without damage. This behavior is exploited in the ADR540BKSZ-REEL7 to set the voltage in a very restricted range. The FET is used to control the output current from the reference terminal of the device. The FET and the Zener diodes are connected to three external input terminals, and are stabilized by the combination of the two external resistors.

The regulated output of the ADR540BKSZ-REEL7 is determined by the output voltage of the Zener diode, the FET and the output current. A stable output voltage is obtained by maintaining the current through the Zener diode and the FET constant, while the resistance of the terminal changes with temperature. The unity gain voltage follower configuration ensures that the output voltage follows the input voltage and maintains its accuracy over the rated output voltage range.

In conclusion, the ADR540BKSZ-REEL7 is a versatile voltage reference which provides stable and accurate output voltage over a wide range of temperatures. It is widely used in many applications requiring precise voltage and temperature coefficients. It minimizes the temperature coefficient, ensures good stability over time and has a low output impedance.

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