Overview

Description

The highly integrated RAA239101 low-power analog front-end IC includes all the necessary peripherals and features required for a complete smoke detector system based on the photoelectric detection principle. It enables a very flexible implementation with parametrization capabilities (LED-current selection, PGA gain setting, integrated battery test feature).

System Benefits​:

  • Low-power analog front-end includes all necessary peripherals for a photoelectric smoke detector.
  • Ultra-low current consumption enables 10y+ battery lifetime.
  • Very few external components are needed with a cost-optimized bill-of-materials (BOM) and small solution size vs. a discrete design.
  • Highly integrated analog front-end (AFE) allows the use of two different IR wavelength diodes/photodetectors (enhanced accuracy, UL217 compliant).
  • Utilizes the small pin count and low-cost RL78/G12 MCU with DataFlash, enabling non-volatile data storage for alarm counter, operating hours, etc.
  • AC mains power supply with small-sized and low quiescent current (IQ) AC/DC buck regulator (optional).

Comparison

Applications

Applications

  • Residential smoke detectors based on photoelectric principle

Winning Combinations Interactive Diagram

Select a block to discover products for your design

Template 2 Sheet.1 Piezo Horn Piezo Horn Piezo Horn EU070 EU070 EU070 AC Mains 85...265VAC AC Mains 85...265VAC AC Mains 85...265VAC 9.6V 9.6V 9.6V Battery 9V (PP3) Battery 9V (PP3) Battery 9V (PP3) HVDD/9V Operation: typ. 5mA in ACTIVE mode, typ. 4uA in SLEEP mode HVDD/9V Operation: typ. 5mA in ACTIVE mode typ. 4uA in SLEEP ... HVDD/9V Operation:typ. 5mA in ACTIVE modetyp. 4uA in SLEEP mode VDD_AFE 9V VDD_AFE 9V VDD_AFE 9V Red LED Red LED Red LED VDD_MCU VDD_MCU VDD_MCU Pushbutton Pushbutton Pushbutton 3 3 3 3 Sheet.54 9V VDD_AFE 9V VDD_AFE 9V VDD_AFE IR PD 1 IR PD 1 IR PD 1 IR LED 1 IR LED 1 IR LED 1 IR LED 2 IR LED 2 IR LED 2 Capacitor Non-polarized Sheet.60 Sheet.61 Sheet.62 Sheet.63 Diode Sheet.65 Sheet.66 Sheet.67 Battery.27 Sheet.69 Sheet.70 Sheet.71 Sheet.72 Sheet.73 Sheet.74 Sheet.75 Sheet.76 Negative Power Rail Line.758 Line.759 Resistor - Fixed Ground - Earth Sheet.82 Sheet.83 Sheet.84 Sheet.85 Ground - Earth.109 Sheet.87 Sheet.88 Sheet.89 Sheet.90 Ground - Earth.114 Sheet.92 Sheet.93 Sheet.94 Sheet.95 Ground - Earth.119 Sheet.97 Sheet.98 Sheet.99 Sheet.100 Ground - Earth.124 Sheet.102 Sheet.103 Sheet.104 Sheet.105 Ground - Earth.129 Sheet.107 Sheet.108 Sheet.109 Sheet.110 Speaker speaker_8_ Sheet.113 Sheet.114 Sheet.115 Sheet.116 Diode - LED Sheet.118 Sheet.119 Sheet.120 Sheet.121 Sheet.122 Darlington.651 Sheet.124 Darlington.254 Resistor - Fixed.158 Resistor - Fixed.159 Diode - LED.160 Sheet.129 Sheet.130 Sheet.131 Sheet.132 Sheet.133 Darlington.651 Sheet.135 Darlington.254 Diode - LED.169 Sheet.138 Sheet.139 Sheet.140 Sheet.141 Sheet.142 Darlington.651 Sheet.144 Darlington.254 Sheet.146 Sheet.147 Sheet.148 Sheet.149 Sheet.150 Sheet.151 Sheet.152 Sheet.153 Sheet.154 Sheet.155 Sheet.156 Sheet.157 Sheet.158 Sheet.159 Sheet.160 Sheet.161 Sheet.162 Sheet.163 Resistor - Fixed.198 Sheet.165 Sheet.166 Sheet.167 Sheet.168 Sheet.169 Sheet.170 Sheet.171 Sheet.172 Sheet.173 Sheet.174 Sheet.175 Sheet.176 Sheet.177 Sheet.178 Sheet.179 Sheet.180 Sheet.181 Sheet.182 Sheet.183 Sheet.184 Sheet.185 Sheet.186 Sheet.187 Sheet.188 Sheet.189 AC Power Source Sheet.191 Alternating Current Diode.237 Sheet.194 Sheet.195 Sheet.196 Diode.241 Sheet.198 Sheet.199 Sheet.200 Connector 1.177 Connector 1.246 Connector 1.247 VDD_MCU 2.7V VDD_MCU 2.7V VDD_MCU 2.7V RL78/G12 Supply Current: typ. 1.2mA/3.0V (LS Main Mode, 8MHz max. 1.2µ A (STOP MODE) MCU Supply Current: typ. 1.2mA/3.0V (LS Main Mode, 8MHz max. ... MCU Supply Current:typ. 1.2mA/3.0V (LS Main Mode, 8MHz max. 1.2µ A (STOP MODE) Connector 1.250 Connector 1.251 4 4 4 4 Sheet.210 Connector 1.263 Connector 1.264 Diode - LED.266 Sheet.214 Sheet.215 Sheet.216 Sheet.217 Sheet.218 Darlington.651 Sheet.220 Darlington.254 IR PD 2 IR PD 2 IR PD 2 Diode LED Red.277 Sheet.224 Sheet.225 Sheet.226 Sheet.227 Darlington.651 Sheet.229 Darlington.254 Sheet.231 Sheet.232 Buck Regulator Buck Regulator Buck Regulator Sheet.234 MCU 20-Pin SSOP 4kB Flash 0.5Kb RAM 2kB Dada Flash MCU 20-Pin SSOP 4kB Flash 0.5Kb RAM 2kB Dada Flash MCU20-Pin SSOP 4kB Flash 0.5Kb RAM 2kB Dada Flash VDD VDD VDD GPIO GPIO GPIO SPI SPI SPI GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO INTP INTP INTP GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO VSS VSS VSS Sheet.235 Analog Front-End (AFE) Analog Front-End (AFE) Analog Front-End (AFE) HVDD HVDD HVDD VMCU VMCU VMCU SPI SPI SPI LED1EN LED1EN LED1EN LED2EN LED2EN LED2EN PD_SEL PD_SEL PD_SEL AFE_EN AFE_EN AFE_EN AFE_READY AFE_READY AFE_READY HORN_DIS HORN_DIS HORN_DIS BATT_SEL BATT_SEL BATT_SEL DGND DGND DGND AGND AGND AGND HGND HGND HGND Horn_Driver Horn_Driver Horn_Driver VSMKHORN VSMKHORN VSMKHORN ADC_IN ADC_IN ADC_IN PHOTO_OUT PHOTO_OUT PHOTO_OUT PD2N PD2N PD2N PD12P PD12P PD12P PD1N PD1N PD1N LED2 LED2 LED2 LED1 LED1 LED1 VBATT VBATT VBATT
Exiting Interactive Block Diagram

Videos & Training

Lab On The Cloud Demonstration for Household Smoke Detector Solution

Demonstration of Renesas’ Lab on the Cloud virtual environment for the Household Smoke Detector Solution.