Functional description
As8072 is a CMOS integrated PIR (passive infra red) controller with low power consumption. Its internal structure adopts
The mixed mode design of analog and digital hybrid circuits is very stable in all cases. The output part is free by the user
The selection of relay and thyristor output improves the flexibility of use. The practical application circuit is quite simple, which can greatly reduce the production cost.
Save space and make debugging more convenient. As8072 is the improvement of traditional PIR human thermoluminescence infrared detection technology.
Product characteristics
The working voltage is 4.0 ~ 5.5V, and the working current is less than 800ua.
External oscillation resistance and capacitance.
External photoresist, not working in the daytime.
Output can drive relay or thyristor.
Built in two-stage independent high input impedance operational amplifier, with adjustable gain, which can be matched with a variety of PIR sensors for signal preprocessing.
Strong noise suppression ability and high reliability.
The delay time is adjustable, precise and wider.
· built in output PIR probe reference voltage.
Integrated zero crossing detection, synchronous triggering of AC power supply, reducing power pollution.
Product application
Automatic lighting of gardens, garages, corridors and stairs.
Home, shop, office, factory automatic alarm and doorbell system.
Automatic switch system of exhaust fan and ceiling fan.