MAX31855KASA+T is an Analog Devices (Maxim) cold-junction-compensated K-type thermocouple-to-digital converter in 8-pin SOIC, tape and reel — for industrial temperature sensing: HVAC, appliances and process monitoring. 14-bit conversion with 0.25 °C resolution and integrated cold-junction compensation is the selection point: direct thermocouple-to-digital in one chip, no calibration tables. Selection advice: the K in KASA+T denotes K-type (-200 °C to +1350 °C range); sibling variants cover J, N, T, S, R and E types — match the letter to your thermocouple, they are not interchangeable; the read-only SPI interface suits simple MCU polling; note it is designed for ungrounded thermocouples. 3.0 V to 3.6 V supply. ADI lists this part as Active. Parameters verified against the ADI official product page.
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From the verified technical profile: Thermocouple type: K-type; Converter resolution: 14 bit; Temperature resolution: 0.25°C. These are the catalog-recorded values for MAX31855KASA+T — always re-check them against the manufacturer datasheet revision quoted on your BOM before finalizing the design.