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DS18B20 temp sensor IC
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Author:  yamadanao [ 21 Jun 2017, 05:46 ]
Post subject:  DS18B20 temp sensor IC

DS18B20 temp sensor IC Dq pin is connected to PSEN of controller in my application.

Here is the date sheet of ds18b20

But in datasheet its mentioned that its connected to I/O port.

And second doubt is how I/O port senses temp? It should be connected to ADC pin of controller.

Author:  KevinA [ 22 Jun 2017, 12:45 ]
Post subject:  Re: DS18B20 temp sensor IC

The DS18B20 is a 1 wire device, this is a digital device. I use them to collect engine temperatures: Exhaust Gas Temperature, Cylinder Head Temperature, Air Intake Temperature, Oil Temperature. On a two cylinder engine it takes 6 probes, 4 cylinder engine 10 probes, with turbo charger 12 probes. All these devices run in parasite mode from one shielded pair of twisted 24 gauge wire using a I2C to 1-wire controller.
This design uses a DS18B20 as a redundant temperature check for the MAX31850 Cold-Junction Compensated, 1-Wire
Thermocouple-to-Digital Converters:

https://datasheets.maximintegrated.com/ ... S18B20.pdf
https://datasheets.maximintegrated.com/ ... X31851.pdf

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