How do I measure one or more PT100/1000 (PTC Resistor) with a Arduino/ATmega328 over I2C? Are there any ready microchips? Do I need to construct my own circuit? If so, are there any ready schematics?
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I've seen some ADC's from Analog specifically for RTD sensors with I2C interface - check their parametric table. Other manufacturers probably also have these.
Also, you can use any I2C ADC with differential input for that.
Schematics will be in datasheet :-)
answered Mar 11, 2011 at 9:56
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2\$\begingroup\$ This not answer the question. \$\endgroup\$ Commented Oct 11, 2013 at 15:32
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1\$\begingroup\$ @DanielGrillo Actually, it is. An I2C ADC is practically the only way to read an analog thermistor via I2C. (aside from programming an mcu to act like an I2C ADC). \$\endgroup\$– PasserbyCommented Oct 11, 2013 at 16:38
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3\$\begingroup\$ Answer or not, two years out is a funny time to be bringing it up \$\endgroup\$ Commented Oct 11, 2013 at 18:37
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\$\begingroup\$ @ScottSeidman Standards change. The bar raises. \$\endgroup\$ Commented Jan 2, 2016 at 6:09
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\$\begingroup\$ @NickAlexeev, apparently every two years! \$\endgroup\$ Commented Jan 2, 2016 at 19:11