Transcription of Integrated Optical Module for Smoke Detection Data Sheet ...
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Integrated Optical Module for Smoke Detection Data Sheet ...
Integrated Optical Module for Smoke Detection data Sheet ADPD188BI. FEATURES GENERAL DESCRIPTION. mm mm mm Module with Integrated Optical The ADPD188BI is a complete photometric system for Smoke components Detection using Optical dual wavelength technology. The Module 1 blue LED, 1 IR LED, and 2 photodiodes integrates a highly efficient photometric front end, two light 2 external inputs for other sensors (for example, carbon emitting diodes (LEDs), and two photodiodes (PDs). These monoxide (CO) and temperature) items are housed in a custom package that prevents light from Three 370 mA LED drivers going directly from the LED to the photodiode without first 20-bit burst accumulator enabling 20 bits per sample period entering the Smoke Detection chamber. On-board sample to sample accumulator enabling up to The front end of the application specific Integrated circuit 27 bits per data read (ASIC) consists of a control block, a 14-bit analog -to-digital Optimized SNR for signal limited cases converter (ADC) with a 20-bit burst accumulator, and three I2C or SPI communications flexible, independently configurable LED drivers.
detection. The analog front end (AFE) features best- in-class rejection of signal offset and corruption due to modulated interference commonly caused by ambient light. The data output and functional configuration occur over a 1.8 2V I C interface or serial peripheral interface (SPI) port. FUNCTIONAL BLOCK DIAGRAM . TIME SLOT A TIME SLOT B ...
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