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Description: MAXIM IC MAX6675 Cold Junction Compensated K-Type Thermocouple to Digital Converter. This simple 8-pin SOIC IC attaches directly to any K-Type Thermocouple and interfaces via a SPI read-only interface.
Works great with 8-pin SOIC to DIP adapters.
Based on 2 ratings:
2 of 2 found this helpful:
I’ve had good luck using this chip, particularly when I compare it to the AD595-AQ.
What I like:
What I don’t like:
ADC timing gotchas, :
I’ve used this successfully in a project which uses:
Not sure if I just got a bad part or if there’s a larger quality issue here, but I attempted to use one of these devices in an oven control with a standard type K thermocouple. Power was 3.3V.
The device worked perfectly for several hours including multiple power cycles for testing purposes. After those few hours (fortunately during a test cool-down cycle) suddenly the temperature readings went to zero, and on subsequent power cycle the chip literally exploded (!) destroying the attached ARM controller circuitry in the process (probably due to shorting out and applying either 0V or 3.3V at high current to the delicate SPI pins). I have no idea how this is possible besides a manufacturing defect; the 3.3V supply was rock stable throughout and the ARM device on the same supply didn’t blink until this chip exploded.
I have been in electrical engineering/embedded systems for well over a decade so I know all about ESD precautions, etc. This is the first time I have had a non-Chinese sensor chip do anything like this!