概览

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 3V to 5V 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 RAA239101 provides a driver that can switch between two LEDs to pulse the smoke detection LED emitters with a DAC adjustable current. Two photodiode receiver channels with programmable gain amplification using an ADC allow the detection of smoke by sensing the LED light scattered off of smoke in a detection chamber.

RAA239101 Block Diagram
RAA239101 Block Diagram
  • Ultra-low current consumption
  • 9V or 3V to 5V 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

应用

  • Photoelectric smoke detectors

文档

= 相关文档
类型 文档标题 日期
数据手册 - 简易格式
RAA239101 Short-Form Datasheet
PDF 144 KB
数据手册
RAA239101 Datasheet
登录后下载 PDF 1.63 MB
产品变更通告
PCN21057 - Alternate assembly facility of the listed Renesas QFN / TQFN packaged products
PDF 179 KB
3 items

设计和开发

开发板与套件

EU070-SMOKEDETPOCZ

参考
了解更多

Household Smoke Detector Reference Design

This smoke detector design using the RAA239101 low power analog front-end (AFE) IC with the RL78/G12 MCU includes peripherals and features for a photoelectric smoke...

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ECAD 模块

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

扩展 ECAD 模块
Diagram of ECAD Models

产品选择

    Processing table
    Pkg. Type
    Lead Count (#)
    Carrier Type
    Moisture Sensitivity Level (MSL)
    购买 / 样片
    器件号
    RAA239101A2GNP#HA0
    circle有效
    memory
    spa
    view_in_ar
    可提供样片
    		 QFN 32 Reel 3 获取样片,
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