{"id":3728,"date":"2026-06-08T02:28:56","date_gmt":"2026-06-08T02:28:56","guid":{"rendered":"https:\/\/materialparts.com\/max31865aapt\/"},"modified":"2026-06-08T02:28:56","modified_gmt":"2026-06-08T02:28:56","slug":"max31865aapt","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/max31865aapt\/","title":{"rendered":"MAX31865AAP+T"},"content":{"rendered":"

Productos<\/h2>\n

The MAX31865AAP+T from Analog Devices is an easy-to-use RTD-to-digital converter optimized for platinum RTDs (PT100 to PT1000). It features 15-bit ADC resolution, 0.03125C temperature resolution, SPI interface, and +\/-45V input protection in a 20-pin SSOP package.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Funci\u00f3n<\/td>\nRTD-to-Digital Converter<\/td>\n<\/tr>\n
RTD Compatibility<\/td>\nPT100 to PT1000 (100 to 1000 ohm at 0C)<\/td>\n<\/tr>\n
Wire Configurations<\/td>\n2-wire, 3-wire, 4-wire<\/td>\n<\/tr>\n
ADC Resolution<\/td>\n15 bits<\/td>\n<\/tr>\n
Temperature Resolution<\/td>\n0.03125C (nominal)<\/td>\n<\/tr>\n
Total Accuracy<\/td>\n0.5C max (0.05% of FS)<\/td>\n<\/tr>\n
Conversion Time<\/td>\n21ms (max)<\/td>\n<\/tr>\n
Interface<\/td>\nSPI-compatible<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n3.0V to 3.6V<\/td>\n<\/tr>\n
Input Protection<\/td>\n+\/-45V<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40 to 125 C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Complete RTD measurement solution with fault detection<\/li>\n
  • 15-bit ADC resolution with 0.03125C temperature resolution<\/li>\n
  • Compatible with 2-, 3-, and 4-wire RTD connections<\/li>\n
  • Programmable fault detection for open\/short RTD conditions<\/li>\n
  • +\/-45V input protection on RTD inputs<\/li>\n
  • Fully differential VREF inputs<\/li>\n
  • SPI-compatible serial interface<\/li>\n
  • External reference resistor sets sensitivity<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Industrial temperature measurement<\/li>\n
    • Medical equipment temperature monitoring<\/li>\n
    • Instrumentation and calibration<\/li>\n
    • Process control systems<\/li>\n
    • HVAC temperature sensing<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MAX31865AAP+T from Analog Devices is an easy-to-use RTD-to-digital converter optimized for platinum RTDs (PT100 to PT1000). It features 15-bit ADC resolution, 0.03125C temperature resolution, SPI interface, and +\/-45V input protection in a 20-pin SSOP package. Key Specifications Function RTD-to-Digital Converter RTD Compatibility PT100 to PT1000 (100 to 1000 ohm at 0C) Wire […]<\/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-3728","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, 15-bit, 0.03125C res, SPI, +\/-45V prot, SSOP-20","date_code":"","package_case":"SSOP-20 (5.3mm body width)","in_stock":5893,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/MAX31865.pdf","price":"$3.37 @ 1ku","product_introduction":"The MAX31865AAP+T from Analog Devices is an easy-to-use resistance-to-digital converter optimized for platinum resistance temperature detectors (RTDs). An external precision resistor sets the sensitivity for the specific RTD being used, and a precision delta-sigma ADC converts the ratio of the RTD resistance to the reference resistance into digital form. The device supports PT100 to PT1000 RTDs (100 ohm to 1000 ohm at 0C) and is compatible with 2-wire, 3-wire, and 4-wire sensor connections. With 15-bit ADC resolution, the nominal temperature resolution is 0.03125C, and total accuracy is 0.5C (0.05% of full scale) over all operating conditions. The RTD inputs are protected against overvoltage faults as large as +\/-45V. Programmable detection of RTD and cable open and short conditions simplifies system diagnostics. The MAX31865 communicates via an SPI-compatible interface and is available in a 20-pin SSOP package rated for -40 to 125 C operation.","working_principle":"The MAX31865AAP+T operates as a precision resistance-to-digital converter optimized for RTD measurement. Key subsystems include: (1) Excitation Current Source - a precision current source drives the RTD and reference resistor in a ratiometric configuration; the ratio measurement cancels current source errors; (2) Delta-Sigma ADC - a 15-bit delta-sigma converter measures the ratio of RTD voltage to reference voltage, providing a direct resistance ratio output; (3) SPI Interface - a 4-wire SPI interface (SCLK, CS, SDI, SDO) provides read\/write access to configuration, fault, and data registers; (4) Fault Detection - programmable thresholds detect open RTD element, RTD shorted to out-of-range voltage, or short across RTD element; fault status is available in a register; (5) Input Protection - ESD and overvoltage clamps protect the RTD input pins against faults up to +\/-45V; (6) Reference Resistor - an external precision resistor (typically 0.1% tolerance or better) sets the measurement range and sensitivity.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VGND<\/td>Power<\/td>Ground<\/td><\/tr>
      2<\/td>RTDIN+<\/td>Input<\/td>RTD positive input<\/td><\/tr>
      3<\/td>RTDIN-<\/td>Input<\/td>RTD negative input<\/td><\/tr>
      4<\/td>REFIN+<\/td>Input<\/td>Reference resistor positive input<\/td><\/tr>
      5<\/td>REFIN-<\/td>Input<\/td>Reference resistor negative input<\/td><\/tr>
      6-8<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      9<\/td>RDY<\/td>Output<\/td>Conversion ready (active low)<\/td><\/tr>
      10<\/td>CS<\/td>Input<\/td>SPI chip select (active low)<\/td><\/tr>
      11<\/td>SDI<\/td>Input<\/td>SPI data input<\/td><\/tr>
      12<\/td>SDO<\/td>Output<\/td>SPI data output<\/td><\/tr>
      13<\/td>SCLK<\/td>Input<\/td>SPI clock<\/td><\/tr>
      14-16<\/td>BIAS\/DRDY\/NC<\/td>Mixed<\/td>Bias, data ready, no connect<\/td><\/tr>
      17-20<\/td>FORC+\/FORC-\/VDD\/NC<\/td>Mixed<\/td>Force inputs, supply, no connect<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial temperature measurement: high-accuracy PT100\/PT1000 RTD reading for process control<\/li>
      • Medical equipment: precision body temperature monitoring with 4-wire RTD configuration<\/li>
      • Instrumentation: laboratory-grade temperature measurement with 0.03125C resolution<\/li>
      • Process control: temperature monitoring in chemical and food processing<\/li>
      • HVAC: building automation temperature sensing with fault detection for sensor wiring<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LTC2983CLX#PBF<\/td>LQFP-48<\/td>Multi-sensor, universal temp measurement<\/td><\/tr>
        Maxim<\/td>MAX31865ATP+T<\/td>TQFN-20<\/td>Same device, LFCSP package<\/td><\/tr>
        TI<\/td>ADS1220IPWR<\/td>TSSOP-16<\/td>24-bit ADC for RTD, more flexible<\/td><\/tr>
        Analog Devices<\/td>AD7124-4BCPZ<\/td>LFCSP-24<\/td>24-bit, multi-channel RTD ADC<\/td><\/tr>
        Microchip<\/td>MCP3561R-E\/ST<\/td>TSSOP-20<\/td>24-bit delta-sigma for RTD<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/3728","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=3728"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/3728\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=3728"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=3728"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=3728"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=3728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}