Feature

• Operating voltage: 3.0V~5.0V

• Detection range: 0.1~0.8dB/m
• Temperature compensation and drift compensation function
• Adjustable alarm sensitivity
• Interfaces: UART (TX/RX)/STATUS
• Communication mode: UART communication
• Communication interface baud rate: 9600bps
• Standby current: < 15μA @ 3V

• Alarm current: < 20mA @ 3V

Description

The BM22S2021-1 is a smoke detector digital sensor which includes an integrated MCU as the master device with a serial communication interface which offers widespread, flexible and convenient use. The sensor integrates dual-channel ISINK driver circuit and smoke detection AFE circuit. 
The sensor’s small size advantage offers easy integration into product applications.
Additional advantages include long service life, easy operation, no external drive circuit, low
cost, etc. In summarising, this is a low-cost digital sensor especially designed for smoke detection
applications and suitable for use in smoke alarms, smart homes, etc.

Datasheet