Library

MAX31855

Thermocouple-to-digital converter, SPI, SOIC-8

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Paste this into Claude Code (VS Code panel, Adom editor, or terminal) to install:

Search the Adom Wiki for the library component "MAX31855" (slug: max31855) at https://wiki-ufypy5dpx93o.adom.cloud/wiki/libraries/max31855. Pull down the KiCad symbol, footprint, and 3D model files from the wiki page's assets. Install them into my current KiCad project and register in sym-lib-table and fp-lib-table. If the page has a datasheet URL, save that too.
Manufacturer Maxim Integrated
Package SOIC-8
Pins 8 pins (SPI, Thermocouple, Power)
Range -200°C to +1350°C (K-type)
Resolution 14-bit (0.25°C)
Cold Junction ±2°C accuracy
Interface SPI (read-only)

Library View

Interactive symbol, footprint, and 3D model — hover pins for cross-highlighting.

SymbolGenerated Generated from pin data (KiCad symbol Sensor_Temperature/MAX31855KASA is multi-unit)
FootprintKiCad KiCad standard library: Package_SO/SOIC-8_3.9x4.9mm_P1.27mm
3DGenerated Generated pad visualization (Babylon.js)

Breakout Board

Auto-generated breakout molecule for MAX31855 — all pins brought to 2mm-pitch headers with 4 corner machine pins on 8mm grid.

Pricing & Availability

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DigiKey Not available
JLCPCB Not available

Specifications

Range-200°C to +1350°C (K-type)
Resolution14-bit (0.25°C)
Cold Junction±2°C accuracy
InterfaceSPI (read-only)
PackageSOIC-8

Pin Configuration

SPIThermocouplePower
PinNameGroupFunction
SPI — SPI read interface
5SCKSPISPI clock input
6CSSPIChip select (active low)
7SOSPISPI data output
Thermocouple — T+/T- input
2T-ThermocoupleThermocouple negative
3T+ThermocoupleThermocouple positive
Power — Supply and ground
1GNDPowerGround
4VCCPowerSupply voltage (3.0V-3.6V)
8NCPowerNo connection

AI Skill Technical Reference

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MAX31855 — Thermocouple-to-digital converter, SPI, SOIC-8

Manufacturer: Maxim Integrated Package: SOIC-8

Description

The MAX31855 is a cold-junction compensated thermocouple-to-digital converter from Maxim. Reads K, J, N, S, T, E, or R type thermocouples via SPI. 14-bit resolution covering -200C to +1800C.

Electrical Specifications

  • Range: -200°C to +1350°C (K-type)
  • Resolution: 14-bit (0.25°C)
  • Cold Junction: ±2°C accuracy
  • Interface: SPI (read-only)
  • Package: SOIC-8

Pin Configuration

Package: SOIC-8

  • Pin 1: GND — Ground
  • Pin 2: T- — Thermocouple negative
  • Pin 3: T+ — Thermocouple positive
  • Pin 4: VCC — Supply voltage (3.0V-3.6V)
  • Pin 5: SCK — SPI clock input
  • Pin 6: CS — Chip select (active low)
  • Pin 7: SO — SPI data output
  • Pin 8: NC — No connection

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0 revisions · Updated 2026-03-02 17:31:36