Integrated circuit for smoke alarm and system
An integrated circuit and smoke alarm technology, applied in the field of sensor detection and smoke alarms, can solve the problems of difficult sensitivity control of smoke alarms, complex internal structure of single-chip circuits, and high customization cost, and achieve easy implementation, good sensitivity and consistency. , the effect of demand reduction
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[0036] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.
[0037] The integrated circuit for smoke alarm includes three detection function pins, two power supply pins, one alarm pin and two pins for calibration, button and indication. The three detection function pins The pins are IR+ terminal, IR- terminal and IRED terminal respectively, the two power supply pins are VDD terminal and VSS terminal respectively, and the alarm pin is IO3 terminal, which is used to realize calibration, keys and indication The pins are IO1 and IO2 respectively.
[0038] In a preferred embodiment, the integrated circuit includes an amplifier, an ADC module, a CPU module, a constant current driver module and an alarm driver module, and the first input terminal of the amplifier is connected to the IR+ terminal , the second input end of the amplifier is connected to the IR- end, the outpu...
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