RAA239101 - Photoelectric Smoke Detector AFE

Renesas

General Description

8 3.1 Absolute Maximum Ratings

Key Features

Ultra-low current consumption.
9V or 3.3V battery operation.
LDO for microcontroller supply.
10-bit ADC for measuring voltage on 7 analog pins.
Drives two LED emitters with 8-bit current DAC control from 45mA to 600mA.
Two photodiode receivers with programmable gain amplifiers.
General purpose IO.
Horn driver with clamp diodes.
SPI interface.

📥 Download Datasheet

RAA239101 photoelectric smoke detector afe by Renesas - Datasheet Preview

Datasheet Details

Part number	RAA239101
Manufacturer	Renesas
File Size	1.29 MB
Description	Photoelectric Smoke Detector AFE
Datasheet	RAA239101 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Datasheet RAA239101 Photoelectric Smoke Detector AFE IC The RAA239101 is a low-power Analog Front-End (AFE) IC; combined with a microcontroller, photoelectric emitter/detector(s), horn, and minimal external components, it forms a complete smoke detector. The IC operates from a 3.3V or 9V battery and has an LDO to provide power to a microcontroller. The battery-check feature can be used to signal an alarm when the battery is low. The IC provides an SPI bus for a microcontroller interface and a general-purpose IO. The RAA239101 provides a driver that can switch between two LEDs to pulse the smoke detection LED emitters with a DAC adjustable current.