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AD22105AR

AD22105AR Description

The AD22105AR from Analog Devices Inc. is a programmable solid-state thermostat designed for precision temperature monitoring and control in surface-mount applications. This obsolete but highly capable device operates with an open-collector output and features an active-high logic output, triggering when temperatures exceed a user-defined threshold. With a ±2°C accuracy and a 2.7V to 7V supply voltage range, it is optimized for low-power systems, consuming just 90µA to 120µA of supply current. The AD22105AR is housed in an 8-pin SOIC package and is ideal for applications requiring reliable overtemperature protection.

AD22105AR Features

• Programmable Switching Temperature: Allows flexible threshold setting for diverse thermal management needs.
• Low Power Consumption: Operates at 90µA–120µA, making it suitable for battery-powered systems.
• High Accuracy: ±2°C precision ensures reliable temperature monitoring.
• Open-Collector Output: Supports 10mA sink current, enabling direct interfacing with microcontrollers or logic circuits.
• Wide Supply Range: Functions from 2.7V to 7V, accommodating various power supply configurations.
• Hot Trip Threshold: Designed for overtemperature detection, ensuring system safety.
• Surface-Mount Package: 8-SOIC form factor for compact PCB integration.

AD22105AR Applications

The AD22105AR excels in environments requiring precise thermal regulation, such as:

• Consumer Electronics: Overheating protection in smartphones, laptops, and power adapters.
• Industrial Systems: Monitoring critical components in motor drives, power supplies, and HVAC systems.
• Automotive Electronics: Safeguarding ECUs, infotainment systems, and battery management modules.
• Medical Devices: Ensuring safe operating temperatures in portable diagnostic equipment.
• Embedded Systems: Thermal management in IoT sensors and low-power microcontrollers.

Conclusion of AD22105AR

Though marked as obsolete, the AD22105AR remains a robust solution for applications demanding programmable overtemperature detection with high accuracy and low power consumption. Its open-collector output, wide voltage range, and compact footprint make it a versatile choice for thermal protection in consumer, industrial, and automotive systems. Engineers seeking a reliable, low-complexity thermostat will find the AD22105AR well-suited for safeguarding sensitive electronics from thermal damage.