ADM1021ARQZ

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The ADM1021ARQZ integrated circuit is a low-voltage, dual Automatic Temperature Compensation (ATC) temperature sensor and thermal protection field-effect transistor (FET) specifically designed for thermal management applications. It combines a temperature sensor, an over-temperature protection package, and an on-chip enable switch. The device is optimized for low-voltage applications and is ideal for use in a variety of applications such as junction box over-temperature protection and system over-temperature protection.

The ADM1021ARQZ device measures temperatures of 0 to 120 °C or -10 to 70 °C in 0.25°C increments. The device contains two temperature measurement channels, and the accuracy is within ±2°C at 25°C. There is also a dedicated RESET pin to reset the outputs in case of an emergency. The device is also equipped with three protection pins to protect against unintentional over-temperature conditions.

In terms of working principle, the ADM1021ARQZ device is based on the principle of thermocouple by providing an ideal thermal trigger mechanism together with a simple sense and control circuit. It uses a simple two-terminal sensing network, which enables the device to monitor the temperature of a single component such as a linear component or system component. The device contains on-chip amplifiers, comparators and other functional blocks to sense and react to temperature rise above a set point.

When the device is activated, the over-temperature alarm output is switched on and the FET switch is activated. This turn-off of the FET cuts off the power supply to the component, thus preventing it from further heating up and causing irreparable damage. When the temperature returns to normal, the device automatically resets and resumes its normal operation.

The ADM1021ARQZ is ideal for use in automotive and industrial applications as it has a high level of accuracy and reliability and provides cost-effective thermal protection. Its low-voltage requirements, combined with small size and low power consumption, make it suited for a variety of applications. In addition, the ability to reset itself after an over-temperature condition is a powerful feature and enhances the safety of the system.

The ADM1021ARQZ is a robust and versatile temperature sensor and over-temperature protection package, created to provide cost-effective protection of system and unit components. Its combination of on-chip temperature measurement functions, enabling and reset capabilities, and small form factor make it an ideal choice for a wide variety of applications in the industrial and automotive sectors.

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