GENERAL DESCRIPTION
The AD22105 is a solid state thermostatic switch. Requiring only one external programming resistor, the AD22105 can be set to switch accurately at any temperature in the −40°C to +150°C wide operating range. Using a novel circuit architecture, the AD22105 asserts an open-collector output when the ambient temperature exceeds the user-programmed setpoint temperature. The AD22105 has approximately 4°C of hysteresis, which prevents rapid thermal on and off cycling.

FEATURES
    User-programmable temperature setpoint
    ±2.0°C maximum ambient setpoint accuracy
    4.1°C typical hysteresis
    Wide supply range: 2.7 V to 7.0 V
    Wide temperature range: −40°C to +150°C
    Low power dissipation

APPLICATIONS
    Industrial process control
    Thermal control systems
    CPU monitoring
    Computer thermal management circuits
    Fan control
    Handheld/portable electronic equipment