IR contactless thermometers are needed for medical applications to monitor an individual’s body temperature before entering any public place. Depending on the target market and application, the thermal range to be monitored, as well as the required accuracy, may differ significantly. This is especially the case when comparing thermometers used in a medical environment versus those used in industrial applications. This design takes into account the thermometer’s range of operation, accuracy, power considerations, and display options.

System Benefits:

  • The RL78/I1D microcontroller (MCU) has enhanced analog functions, such as operational amplifiers, a 12-bit A/D converter, and window comparators. The MCU also supports very low power operation (124µA at 1MHz ) and a high-speed 4µs wake up.
  • As another option for the design, the RL78/I1B MCU can be used if various enhanced analog functions like a 24-bit Delta-Sigma (ΔΣ) A/D converter are required.
  • The ISL9205 battery charger operates as a pulse charger, where the charge current is determined by the current limit of the AC adapter during the constant current phase. The ISL9205 battery charger operates in a linear mode during the constant voltage phase in both adapter cases.



Winning Combinations Interactive Diagram

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4:3 ratio Sheet.1 Sheet.2 Sheet.3 Sheet.4 EU084 EU084 EU084 Battery Charger Iout, max = 840 mA Battery Charger IOUT, max = 840mA Battery Charger IOUT, max = 840mA Battery.27 Sheet.21 Sheet.22 Sheet.23 Haptics Touch Sheet.25 Sheet.26 Sheet.27 Sheet.28 Speaker speaker_8_ Sheet.31 Sheet.32 Sheet.33 Sheet.34 USB Plug Sheet.36 Sheet.37 Sheet.38 Sheet.39 Sheet.40 USB Sheet.48 Sheet.49 Sheet.50 Sheet.51 Sheet.52 Sheet.53 LCD Display Sheet.82 Sheet.83 Sheet.84 Sheet.85 Sheet.86 Sheet.87 Sheet.88 Sheet.89 Sheet.90 Sheet.91 Sheet.92 Sheet.93 Sheet.94 Sheet.95 Sheet.96 Sheet.97 Sheet.98 Sheet.99 Sheet.100 Sheet.101 Sheet.102 Sheet.103 Sheet.104 Sheet.105 Sheet.106 Sheet.107 Sheet.108 Sheet.109 Sheet.110 ON ON ON OFF OFF OFF Sheet.113 Sheet.114 Sheet.115 Sheet.116 Sheet.117 Sheet.118 Sheet.119 Sheet.183 Sheet.184 Sheet.186 Sheet.187 Shunt Sheet.65 Sheet.188 Sheet.189 Sheet.190 nFault nFault nFault nStatus nStatus nStatus Sheet.193 Sheet.55 Darlington.131 Sheet.58 Sheet.59 Darlington.254 Sheet.61 Sheet.62 Darlington.254 Shunt.194 Sheet.195 Sheet.198 Sheet.199 Darlington.131 Sheet.201 Sheet.202 Darlington.254 Sheet.204 Sheet.205 Darlington.254 USB Plug.41 Sheet.42 Sheet.43 Sheet.44 Sheet.45 Sheet.46 VIN 5V, 1A VIN 5V, 1A VIN 5V, 1A Connector 1 Connector 1.209 Sheet.210 Connector 1.211 Sheet.213 Sheet.214 Sheet.215 IR Thermopile Sensor IR Thermopile Sensor IR Thermopile Sensor Sheet.217 Sheet.220 Sheet.221 Sheet.223 1st Choice 1st Choice 1st Choice 2nd Choice PGA Optional 2nd Choice PGA Optional 2nd Choice PGA Optional IIN, max=7.2 mA IIN, max=7.2 mA IIN, max=7.2 mA 500mAh 3.6V Li-Ion 500mAh 3.6V Li-Ion 500mAh3.6V Li-Ion MCU MCU MCU MCU VDD 1.6V - 3.6V VDD 1.6V - 3.6V VDD 1.6V - 3.6V Buzzer Output Buzzer Output Buzzer Output GP/IO GP/IO GP/IO I1D GP/IO I1B LCD I1D GP/IO I1B LCD I1D GP/IOI1B LCD I1D Op Amp I1D Op Amp I1D Op Amp I1B PGA (x32) I1B PGA (x32) I1B PGA (x32) I1B 12 Bit ∆Σ I1B 12Bit ∆Σ I1B 12Bit Σ I1D 12 Bit ADC I1D 12Bit ADC I1D 12Bit ADC Sheet.222 Sheet.224 Sheet.225
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