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RAA239101 - Photoelectric Smoke Detector AFE

General Description

.

3.

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

Datasheet Details

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

View original datasheet text
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.