The MAX31865ATP+T from Analog Devices is an RTD-to-digital converter supporting PT100-PT1000 sensors, 15-bit resolution, 2\/3\/4-wire configuration, and SPI interface in TQFN-20.<\/p>\n
| Paquete<\/td>\n | TQFN-20 (5x5mm)<\/td>\n<\/tr>\n<\/table>\nCaracter\u00edsticas<\/h2>\nAplicaciones<\/h2>\nProduct Overview The MAX31865ATP+T from Analog Devices is an RTD-to-digital converter supporting PT100-PT1000 sensors, 15-bit resolution, 2\/3\/4-wire configuration, and SPI interface in TQFN-20. Key Specifications Package TQFN-20 (5x5mm) Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Power management<\/p>","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-5663","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-sensors","chip_brand-adi"],"acf":{"brief_explanation":"RTD-to-digital converter, PT100\/PT1000, SPI, TQFN-20","date_code":"","package_case":"TQFN-20 (5x5mm)","in_stock":14915,"datasheet":"https:\/\/www.analog.com\/en\/products\/max31865.html","price":"$6.50 @ 1ku","product_introduction":"The MAX31865ATP+T from Analog Devices is an RTD-to-digital converter supporting PT100-PT1000 sensors, 15-bit resolution, 2\/3\/4-wire configuration, and SPI interface in TQFN-20.","working_principle":"The MAX31865ATP+T is an RTD-to-digital converter from Maxim Integrated (now Analog Devices) in TQFN-20, designed to measure PT100 and PT1000 resistance temperature detectors (RTDs) with 15-bit resolution. The device uses a ratiometric measurement technique: a precision current (400uA for PT100, 400uA\/10 for PT1000) flows through the RTD, and the voltage across the RTD is measured relative to a reference resistor (RREF) connected across REFIN+ and REFIN-. The ADC output code = (RTD \/ RREF) x 2^15, so the measurement is ratiometric and independent of the current source accuracy. For a PT100 sensor at 0C (100 ohms) with RREF = 430 ohms: code = (100\/430) x 32768 = 7620. The fault detection circuitry monitors for: RTD open (infinite resistance), RTD short (near-zero resistance), reference resistor out of range, and overvoltage\/undervoltage on the RTD inputs. The FAULT pin goes LOW when any fault is detected, and the fault type is readable via SPI. The DRDY pin goes LOW when a new conversion is complete, enabling interrupt-driven reads. The device supports 1-shot and continuous conversion modes. The conversion time is 21ms at 60Hz filter (50\/60Hz rejection) or 10.5ms at 50Hz filter. The SPI interface operates at up to 5MHz. The internal oscillator eliminates external timing components. The ATP+T suffix specifies TQFN-20, tape-and-reel. Applications include industrial temperature measurement, medical thermometry, and HVAC control.","pin_description":"
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