KA431SAMFTF_G

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The KA431SAMFTF_G is a voltage reference integrated circuit (IC) which is commonly used in power management applications to ensure and maintain constant voltage for optimal operation and power efficiency of connected systems. It functions as a stable and accurate reference voltage source, providing a consistent and reliable output voltage over time and temperature.

The KA431SAMFTF_G is based on the proprietary voltage reference topology of the Low Noise Voltage Reference (LVNVR) family, developed by Analog Devices Corporation. This technology delivers improved temperature stability over existing voltage references, due to its unique combination of an analog reference component and a proprietary management IC.

To start with, the KA431SAMFTF_G is designed to operate in the 3V to 36V voltage range, with a minimum of four external components. Furthermore, the device is available in multiple packaging options, including Standard, SOT-23 and SMT varieties, making it suitable for integration into any system design. In addition, the KA431SAMFTF_G ensures high accuracy over the full temperature range, with temperature coefficient of 40 ppm/°C.

The KA431SAMFTF_G also offers excellent power performance, with quiescent current of just 15 µA and low noise operation. As a voltage reference, the device has a 0.1% initial accuracy and it is able to provide a wide range of usable output voltages ranging from 0.99V to 13.5V.

The main application areas for the KA431SAMFTF_G include personal computing, modems, cellular phones, measuring instruments, and consumer appliances. In addition, the device is ideal for consumer products due to its low power performance and wide temperature range, making it suitable for any environment.

The working principle of the KA431SAMFTF_G is based on the LVNVR topology. This topology requires two components: an analog reference device and an integrated circuit (IC) to manage the reference output. These components work together to ensure accurate and stable reference voltage.

The analog voltage reference circuit is the heart of the device, and it uses a buried Zener diode structure to provide a stable output voltage. The Zener diode is temperature compensated by an on-chip temperature sensor and reference resistor network, eliminating the need for external components. The reference output is then buffered and regulated by the IC, which adjusts the output voltage range to maintain a steady output over the full temperature range.

The integrated circuit also provides additional protection against over-voltage and over-current fault conditions. It has an internal voltage and current limiting circuit to protect against excessive input voltage or over-current load, and an auto-restart circuit which allows it to safely resume normal output voltage after an over-voltage or over-current fault.

In summary, the KA431SAMFTF_G is a reliable IC for applications requiring a precise and stable reference voltage. This versatile and easy to use voltage reference is suitable for a wide range of applications, delivering precise and consistent output even over large temperature ranges and over-voltage/over-current fault conditions.

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