{"id":3095,"date":"2026-05-30T02:46:21","date_gmt":"2026-05-30T02:46:21","guid":{"rendered":"https:\/\/materialparts.com\/max31855kasa\/"},"modified":"2026-05-30T02:46:21","modified_gmt":"2026-05-30T02:46:21","slug":"max31855kasa","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/max31855kasa\/","title":{"rendered":"MAX31855KASA+"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The MAX31855KASA+ is a cold-junction compensated thermocouple-to-digital converter from Analog Devices (formerly Maxim Integrated). It digitizes the signal from a Type K thermocouple with 14-bit resolution, measures the cold-junction temperature with 12-bit resolution, and outputs data via SPI interface in an 8-pin SOIC package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Thermocouple Type<\/td>\nType K<\/td>\n<\/tr>\n
Thermocouple Range<\/td>\n-270C to +1800C<\/td>\n<\/tr>\n
Cold-Junction Range<\/td>\n-40C to +125C<\/td>\n<\/tr>\n
Thermocouple Resolution<\/td>\n14-bit (0.25C)<\/td>\n<\/tr>\n
Cold-Junction Resolution<\/td>\n12-bit (0.0625C)<\/td>\n<\/tr>\n
Accuracy (Type K)<\/td>\n+\/-2C (0C to +700C)<\/td>\n<\/tr>\n
Interface<\/td>\nSPI (read-only)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n3.0V to 3.6V<\/td>\n<\/tr>\n
Supply Current<\/td>\n900 uA typical<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-8 (5.0 x 3.9 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Cold-junction compensation integrated on-chip<\/li>\n
  • 14-bit thermocouple temperature data (0.25C resolution)<\/li>\n
  • 12-bit cold-junction temperature data (0.0625C resolution)<\/li>\n
  • SPI-compatible read-only interface<\/li>\n
  • Open thermocouple detection bit<\/li>\n
  • Fault detection: open, short to GND, short to VCC<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial temperature measurement and control<\/li>\n
    • Oven and furnace monitoring<\/li>\n
    • 3D printer hot-end temperature sensing<\/li>\n
    • Appliance temperature monitoring<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MAX31855KASA+ is a cold-junction compensated thermocouple-to-digital converter from Analog Devices (formerly Maxim Integrated). It digitizes the signal from a Type K thermocouple with 14-bit resolution, measures the cold-junction temperature with 12-bit resolution, and outputs data via SPI interface in an 8-pin SOIC package. Key Specifications Thermocouple Type Type K Thermocouple Range -270C […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,42],"tags":[],"chip_brand":[165],"class_list":["post-3095","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-sensors","chip_brand-adi"],"acf":{"brief_explanation":"Thermocouple-to-digital converter, Type K, 14-bit, SPI, SOIC-8","date_code":"","package_case":"SOIC-8 (5.0 x 3.9 mm)","in_stock":7213,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/MAX31855.pdf","price":"$3.67 @ 1ku","product_introduction":"The MAX31855KASA+ from Analog Devices is a sophisticated cold-junction compensated thermocouple-to-digital converter designed specifically for Type K thermocouples. It integrates a low-noise amplifier, ADC, cold-junction temperature sensor, and SPI interface into a single 8-pin SOIC package. The device provides 14-bit (0.25C) resolution for thermocouple measurement and 12-bit (0.0625C) resolution for cold-junction compensation, delivering a fully digitized temperature output with no external signal conditioning required. Built-in fault detection identifies open thermocouple, short to GND, and short to VCC conditions.","working_principle":"The MAX31855KASA+ operates by simultaneously measuring the thermocouple voltage and the cold-junction (reference junction) temperature. A precision low-noise amplifier amplifies the small thermocouple Seebeck voltage, which is then digitized by a 14-bit sigma-delta ADC. The integrated cold-junction temperature sensor measures the reference junction at the connector point with 12-bit resolution. The device automatically performs cold-junction compensation in the digital domain, calculating the true thermocouple hot-junction temperature using the measured thermocouple voltage and cold-junction temperature. Temperature data is output through a read-only SPI interface as a 32-bit word containing thermocouple temperature, reference junction temperature, and fault status bits.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND<\/td>Ground<\/td>Ground reference<\/td><\/tr>
      2<\/td>T+<\/td>Analog Input<\/td>Thermocouple non-inverting input<\/td><\/tr>
      3<\/td>T-<\/td>Analog Input<\/td>Thermocouple inverting input<\/td><\/tr>
      4<\/td>VCC<\/td>Power<\/td>Supply voltage 3.0-3.6V<\/td><\/tr>
      5<\/td>SCK<\/td>Input<\/td>SPI clock input<\/td><\/tr>
      6<\/td>CS#<\/td>Input<\/td>Chip select (active low)<\/td><\/tr>
      7<\/td>SO<\/td>Output<\/td>SPI data output<\/td><\/tr>
      8<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial oven and furnace temperature monitoring<\/li>
      • 3D printer hot-end and heated bed temperature control<\/li>
      • HVAC and building automation temperature sensing<\/li>
      • Appliance temperature measurement and safety cutoff<\/li>
      • Laboratory and scientific temperature measurement<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        ADI<\/td>MAX31855JASA+<\/td>SOIC-8<\/td>Type J thermocouple version<\/td><\/tr>
        ADI<\/td>MAX31855RASA+<\/td>SOIC-8<\/td>Type R thermocouple version<\/td><\/tr>
        ADI<\/td>MAX31855TASA+<\/td>SOIC-8<\/td>Type T thermocouple version<\/td><\/tr>
        ADI<\/td>MAX31856MUD+<\/td>TSSOP-14<\/td>Universal, supports all thermocouple types<\/td><\/tr>
        Microchip<\/td>MCP9600T-E\/MX<\/td>QFN-20<\/td>Universal thermocouple EMF to digital converter<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3095","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=3095"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3095\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3095"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3095"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3095"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}