ZRC500A03STOB

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The ZRC500A03STOB has been developed by Texas Instruments to be used as a voltage reference for PMIC, or Power Management Integrated Circuit applications. This voltage reference is capable of providing a precision reference voltage with a wide input range and low offset drift. The device is available in a variety of package options, making it a versatile and cost-effective solution for PMICs.

Features

The ZRC500A03STOB offers a number of features that make it a suitable solution for many PMIC applications. These features include:

• A precision reference voltage of 2 V with ±2 mV accuracy at temperatures of -55° to 125°C
• Wide input range of 1.8 V to 15 V
• Low offset drift of 1 μV/°C
• Low quiescent current of 1.2 mA
• High output drive capability of 5 mA

Applications

The ZRC500A03STOB voltage reference is suitable for numerous PMIC applications. These applications include, but are not limited to:

• Cellular phones
• Laptops/notebooks
• Digital TVs
• Radios
• LCD monitors
• MP3 players

Working Principle

The ZRC500A03STOB voltage reference is designed to provide a precision reference voltage based on a bandgap reference circuit. This circuit consists of a number of components that are arranged in a loop, each component being chosen to perform a specific role in the voltage reference circuit. The overall operation of the circuit involves converting an input signal into a precise output signal.

The bandgap reference circuit is composed of three primary components. The first component is a voltage-to-current converter, which converts an input voltage into a corresponding current. The current is then amplified by an amplifier stage, before being converted back into a voltage signal. Finally, the accuracy of the output voltage is improved by a number of bandgap reference elements, which act to stabilise the output voltage over temperature and the supply voltage range.

The combination of these components allows the ZRC500A03STOB to provide a precision voltage reference with a wide input voltage range and low offset drift. This makes the ZRC500A03STOB an ideal solution for PMIC applications, where a reliable and accurate reference voltage is required.

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