component
MAX31865 RTD-to-Digital Converter
Public Made by Adomby adom
Resistance-to-digital converter for PT100/PT1000 RTD temperature sensors, SPI.
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page.json+195−8@@ -1,8 +1,11 @@ {+ "schema_version": 1,+ "type": "component", "slug": "max31865",+ "title": "MAX31865 RTD-to-Digital Converter",+ "brief": "Resistance-to-digital converter for PT100/PT1000 RTD temperature sensors, SPI.", "version": "0.1.0",- "type": "component",- "description": "Resistance-to-digital converter for PT100/PT1000 RTD temperature sensors, SPI.",+ "license": "CC-BY-SA-4.0", "tags": [ "rtd", "pt100",@@ -12,6 +15,195 @@ "adi", "tssop-20" ],+ "component": {+ "mpn": "MAX31865",+ "manufacturer": "Analog Devices",+ "package": "TSSOP-20",+ "pin_count": 20,+ "category": "Sensor",+ "subcategory": "RTD Interface",+ "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/MAX31865.pdf",+ "parts": {+ "symbol": "max31865.kicad_sym",+ "footprint": "max31865.kicad_mod",+ "model_3d": "max31865.glb",+ "model_3d_step": "max31865.step"+ },+ "distributor_links": {},+ "pins": [+ {+ "number": "1",+ "name": "DRDY",+ "type": "output",+ "description": "Active-low, push-pull data-ready output. DRDY goes low when a new conversion result is available in the RTD data register; it returns high after that register is read."+ },+ {+ "number": "2",+ "name": "DVDD",+ "type": "power_in",+ "description": "Digital supply voltage input, 3.0V-3.6V (nominally 3.3V). Bypass to DGND with a 0.1\u00b5F capacitor."+ },+ {+ "number": "3",+ "name": "VDD",+ "type": "power_in",+ "description": "Analog supply voltage input, 3.0V-3.6V (nominally 3.3V). Bypass to GND1 with a 0.1\u00b5F capacitor."+ },+ {+ "number": "4",+ "name": "BIAS",+ "type": "output",+ "description": "Bias voltage output (VBIAS \u2248 2.0V). Provides the bias for the reference and RTD networks; drives up to 5.75mA."+ },+ {+ "number": "5",+ "name": "REFIN+",+ "type": "input",+ "description": "Positive reference-voltage input. Connect to BIAS. Reference resistor (RREF, 350\u03a9-10k\u03a9) is placed between REFIN+ and REFIN-."+ },+ {+ "number": "6",+ "name": "REFIN-",+ "type": "input",+ "description": "Negative reference-voltage input. Reference resistor is connected between REFIN+ and REFIN-."+ },+ {+ "number": "7",+ "name": "ISENSOR",+ "type": "passive",+ "description": "Low side of RREF; connect to REFIN-. Carries the RTD bias current returning through the reference resistor."+ },+ {+ "number": "8",+ "name": "FORCE+",+ "type": "output",+ "description": "High-side RTD drive. Connect to FORCE2 when using the 3-wire connection configuration. Protected to \u00b145V."+ },+ {+ "number": "9",+ "name": "FORCE2",+ "type": "bidirectional",+ "description": "Positive input used in 3-wire configuration only. Tie to FORCE+ for 3-wire RTDs; ground for 2-wire and 4-wire configurations. Protected to \u00b145V."+ },+ {+ "number": "10",+ "name": "RTDIN+",+ "type": "input",+ "description": "Positive RTD sense input. Protected to \u00b145V."+ },+ {+ "number": "11",+ "name": "RTDIN-",+ "type": "input",+ "description": "Negative RTD sense input. Protected to \u00b145V."+ },+ {+ "number": "12",+ "name": "FORCE-",+ "type": "passive",+ "description": "Low-side RTD return. Protected to \u00b145V."+ },+ {+ "number": "13",+ "name": "GND2",+ "type": "power_in",+ "description": "Analog ground. Connect to GND1."+ },+ {+ "number": "14",+ "name": "SDI",+ "type": "input",+ "description": "SPI serial-data input (MOSI). Sampled on the rising edge of SCLK."+ },+ {+ "number": "15",+ "name": "SCLK",+ "type": "input",+ "description": "SPI serial-data clock input."+ },+ {+ "number": "16",+ "name": "CS",+ "type": "input",+ "description": "Active-low chip select. Drive CS low to enable the SPI interface."+ },+ {+ "number": "17",+ "name": "SDO",+ "type": "output",+ "description": "SPI serial-data output (MISO)."+ },+ {+ "number": "18",+ "name": "DGND",+ "type": "power_in",+ "description": "Digital ground."+ },+ {+ "number": "19",+ "name": "GND1",+ "type": "power_in",+ "description": "Analog ground. Connect to GND2."+ },+ {+ "number": "20",+ "name": "N.C.",+ "type": "unconnected",+ "description": "No internal connection. Do not connect."+ }+ ],+ "provenance": {+ "extractor": "ds2sf",+ "datasheet": {+ "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/MAX31865.pdf",+ "pages": 26,+ "sha256": "88f540410eb8c2ac",+ "source_tier": "mfr"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 20,+ "described": 20,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "metadata": {+ "specs": {+ "Type": "RTD-to-digital converter",+ "Sensors": "PT100 / PT1000 (2/3/4-wire)",+ "ADC": "15-bit",+ "Accuracy": "0.5% of full scale (max)",+ "Interface": "SPI",+ "Fault detection": "Open, short, overvoltage",+ "Supply voltage": "3.0 V to 3.6 V",+ "Operating temperature": "-40 C to 85 C"+ }+ },+ "sections": [+ "hero",+ "viewers",+ "readme",+ "breadcrumbs",+ "info"+ ],+ "discovery_triggers": [+ "RTD to digital",+ "PT100 amplifier",+ "PT1000 interface",+ "precision temperature",+ "platinum RTD"+ ],+ "discovery_pitch": "Turn a PT100 or PT1000 platinum RTD into a precise digital temperature reading over SPI, with fault detection built in.",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }, "dependencies": {}, "hero": { "type": "image",@@ -28,10 +220,5 @@ "docs/max31865-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ],- "visibility": "public",- "author": {- "name": "Ray",- "email": "[email protected]"- }+ ] }