AD22105 is a low voltage, resistor programmable thermostatic switch with user-programmable temperature setpoint, wide supply range, wide temperature range, etc. It is suitable for applications such as industrial process control, thermal control systems, CPU monitoring, computer thermal management circuits, fan control, handheld/portable electronic equipment, etc.
The AD22105 is a solid‑state thermostatic switch that operates from a single supply voltage of +2.7 V to +7.0 V. It uses one external programming resistor to set a temperature setpoint anywhere between –40 °C and +150 °C, and provides an open‑collector output that goes low when the ambient temperature exceeds the programmed point. The device includes an optional internal 200 kΩ pull‑up resistor and can drive low‑power LEDs directly.
Typical specifications include a setpoint accuracy of ±3 °C, hysteresis of about 4 °C, and a very low power dissipation of 230 µW at 3.3 V. The part is supplied in an 8‑lead SOIC package, can handle up to 10 mA output current, and is suitable for industrial process control, thermal management, CPU monitoring, fan control, and portable electronics.
| Supply Voltage Range | +2.7 V to +7.0 V |
|---|---|
| Temperature Setpoint Accuracy | ±3.0 °C |
| Hysteresis | 4.1 °C |
| Power Supply Rejection | ±0.05 °C/V |
| Output Low Voltage (V_OL) | 250‑400 mV |
| Supply Current (Output LOW) | 120 µA |
| Supply Current (Output HIGH) | 90 µA |
| Maximum Output Current | 10 mA |
| Maximum Supply Voltage (Absolute Rating) | +11 V |
It operates from +2.7 V up to +7.0 V.
The device has a typical hysteresis of about 4 °C.
The output can source up to 10 mA.
The absolute maximum supply voltage is +11 V.