PM2.5 Sensor Module HT45F22A Characteristics ► Optical sensing ► Detectable particle size : 1µm (min.) ► Dimensions : 45(H)×59(W)×22(D) mm ► Power Consumption : 100mA (max.) ► Weight : 23g ► Output Method : UART ► Low BOM Cost ► HT8 MCU Based ► One-Shot Digital Calibration Application Areas 2015 Holtek New Product Presentation D02 Block Diagram 5V Chamber + IR LED Driver MCU HT45F22A UART OPA PM2.5 Sensor Module Application Circuit OP Amplifier Circuit Master MCU PM2.5 Detect Circuit Input Circuit HT45F22A 2015 Holtek New Product Presentation D02