ADI AD22105ARZ-REEL

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. The AD22105 operates on a single power supply voltage from 2.7 V to 7.0 V, facilitating operation in battery - powered applications as well as in industrial control systems. Because of low power dissipation 230μW at 3.3 V, self heating errors are minimized, and battery life is maximized. An optional internal 200kΩ pull - up resistor is included to facilitate driving light loads such as complementary metal - oxide semiconductor (CMOS) inputs. Alternatively, a low power light emitting diode (LED) indicator can be driven directly.

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

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