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There are temperature sensors with built-in reference and comparator, however you may not like the price and/or the package. Generally not-so-popular older parts subject to possible availability issues, since more modern parts will be configured via SMBUS or I2C or SPI. You could also consider using an NTC thermistor (for example, 100K at 25°C). They are ...


3

You can't reliably get a logic high or low from the LM35 alone, as it only produces an analog value. However, you can use a comparator to compare the voltage coming from the LM35 against some preset value corresponding to the 80 °C threshold you need. There are even chips like the TLV3012 with an exposed internal voltage reference, so you don't need to ...


1

For home temperature measurement projects it's hard to beat the DS18B20 sensor. They're in a TO-92 package and you can have several on a 3 conductor "1-wire" bus, connected to your Arduino or raspberry pi. Factory calibrated to under 1°C and resolution of 0.0625°. I've made stars and strings up to 7 devices but 10 or 20 should be fine. In your case ...


1

Can RF power (at HF frequencies in the range of 0 to 40 dBm into a 50 Ohm load) be measured by a thermometer or other temperature measurement device on the termination load? yes. Temperature measurement is one of the ways RF powers are measured – though that is an approach typically reserved to really large powers (or historically, very wide bandwidths, ...


1

HP aka Keysight use to make rf power meters using thermocouple heads. You might search their app notes and see what they may have to say about construction of the probes. Outfits now make power meter probes connected to a PC via USB to measure power.


1

First of all the FET will not be "consuming" any power but will be DISSIPATING 0.15W under these conditions. Next you need to refer to the THERMAL specs in the datasheet: Much of this depends on your ambient conditions and how you've mounted the device (read the notes!) but assuming you are using the "note 5" conditions it says that: ...


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