Renesas RAA239101

The highly integrated RAA239101 Low-Power Analog Frontend IC includes peripherals & features required for a photoelectric smoke detector system, mainly focused on residential smoke detector designs. Therefore, it is very simple and straightforward to realize a complete photoelectric smoke detector electronics circuitry with only two key components: MCU + AFE. The Renesas Winning Combination "EU070 - Household Smoke Detector" demonstrates the simplicity & functionality of such a compact smoke detector design. 

Key features

• Extend battery life due to Ultra-Low power consumption in Sleep Mode
• Reduce overall BOM cost by integrating multiple functions usually done by discrete devices
• Dual Channel allows two different IR Wavelength LEDs/Photodetectors to increase accuracy
• Two photodiode receivers with programmable gain amplifiers

Additional features

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

Applications

• Smoke Detectors based on photoelectric detection principle

Available Tools

The Renesas winning combination "EU070 - Household Smoke Detector" is available as proof-of-concept hardware and demonstrates the simplicity & functionality of such a compact and cost-effective smoke detector design. Users can instantly test and evaluate this Board via Renesas Lab on the Cloud: www.renesas.com/labonthecloud

•  Key Functionality
  • Fully operational residential smoke detector (photoelectric principle)
  • Battery-powered (3 V or 9 V) and optional AC mains supply
  • Mechanical smoke chamber (3D print)
• Benefits
  • Complete Smoke Detector system with only 2 key components (RL78 MCU and AFE)
  • Ultra-Low Current Consumption enables 10y+ Battery Lifetime
  • cost-optimized BOM and enabling small-size solutions.
• Available Resources:
  • PoC Board, Firmware & Documentation
  • Available at Lab on the Cloud: www.renesas.com/labonthecloud