# Adafruit MAX31865 RTD PT100 or PT1000 Amplifier ## Description Adafruit MAX31865 RTD PT100 or PT1000 Amplifier #MAX31865 #Adafruit #Amplifier #PT100 #PT1000 #referenceDesign #project ## Project Details - **Owner:** vasy_skral - **Created:** 11/8/2024 - **Last Updated:** 3/9/2026 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ - **Stars:** 2 - **Forks:** 2 - **Copies:** 3 ## Key Components ### D1 — [1N4148WS-7-F](https://www.flux.ai/adrian95/1n4148ws-7-f~jvm.md) - Datasheet URL: https://www.diodes.com/assets/Datasheets/1N4148WS_BAV16WS.pdf - Manufacturer Name: Diodes Incorporated - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - Manufacturer Part Number: 1N4148WS-7-F **Pins:** - A [pin 2] - K [pin 1] ### D2 — [1N4148WS-7-F](https://www.flux.ai/adrian95/1n4148ws-7-f~jvm.md) - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.diodes.com/assets/Datasheets/1N4148WS_BAV16WS.pdf - Manufacturer Name: Diodes Incorporated - Manufacturer Part Number: 1N4148WS-7-F **Pins:** - A [pin 2] - K [pin 1] ### D3 — [1N4148WS-7-F](https://www.flux.ai/adrian95/1n4148ws-7-f~jvm.md) - Manufacturer Part Number: 1N4148WS-7-F - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - Datasheet URL: https://www.diodes.com/assets/Datasheets/1N4148WS_BAV16WS.pdf - Manufacturer Name: Diodes Incorporated **Pins:** - A [pin 2] - K [pin 1] ### FB1 — [Ferrite Bead 0603](https://www.flux.ai/vasy_skral/ferrite-bead-0603~znt.md) - Part Type: Inductor **Pins:** - ~ [pin 1] - ~ [pin 2] ### J1 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100~q3l.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### U1 — [MAX31865ATP+](https://www.flux.ai/vasy_skral/max31865atpplus~k0o.md) - Symbol Style: Parametric - Manufacturer Name: Maxim Integrated - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX31865.pdf - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MAX31865ATP+ **Pins:** - ~CS [pin 13] - ~DRDY [pin 18] - BIAS [pin 1] - DGND [pin 15] - DVDD [pin 19] - FORCE- [pin 9] - FORCE+ [pin 5] - FORCE2 [pin 6] - GND [pin 10] - GND [pin 16] - ISENSOR [pin 4] - NC [pin 17] - PAD [pin 21] - REFIN- [pin 3] - REFIN+ [pin 2] - RTDIN- [pin 8] - RTDIN+ [pin 7] - SCLK [pin 12] - SDI [pin 11] - SDO [pin 14] - VDD [pin 20] ### U2 — [MIC5225-3.3YM5-TR](https://www.flux.ai/lcsc/mic5225-3p3ym5-tr~tq72.md) - Package or Case Code: SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BL - Manufacturer Part Number: MIC5225-3.3YM5-TR - Part Type: Linear Voltage Regulators (LDO) - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2004302108_Microchip-Tech-MIC5225-3-3YM5-TR_C512101.pdf - Manufacturer Name: MICROCHIP(美国微芯) - LCSC Part Number: C512101 - Product Info Url: https://lcsc.com/product-detail/Low-Dropout-Regulators-LDO_Microchip-Tech-MIC5225-3-3YM5-TR_C512101.html - JLCPCB Part Class: Extended Part **Pins:** - EN [pin 3] - GND [pin 2] - IN [pin 1] - NC [pin 4] - OUT [pin 5] ### X1 — [TerminalBlock-01x02P-3.50mm](https://www.flux.ai/vasy_skral/terminalblock-01x02p-350mm~mcc.md) - Part Type: Connector **Pins:** - P1 [pin 2] - P2 [pin 1] ### X2 — [TerminalBlock-01x02P-3.50mm](https://www.flux.ai/vasy_skral/terminalblock-01x02p-350mm~mcc.md) - Part Type: Connector **Pins:** - P1 [pin 2] - P2 [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/vasy_skral/adafruit-max31865-rtd-pt100-or-pt1000-amplifier~3do](https://www.flux.ai/vasy_skral/adafruit-max31865-rtd-pt100-or-pt1000-amplifier~3do).* --- *Generated from [https://www.flux.ai/vasy_skral/adafruit-max31865-rtd-pt100-or-pt1000-amplifier~3do](https://www.flux.ai/vasy_skral/adafruit-max31865-rtd-pt100-or-pt1000-amplifier~3do)*