MAX31855
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MAX31855

Cold-Junction Compensated Thermocouple-to-Digital Converter

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Accurate Thermocouple-to-Digital Converter IC Simplifies Designs and Lowers System Cost

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Part Details
Part Models 14
1ku List Price Starting From $4.09
Features
  • Integration Reduces Design Time and Lowers System Cost
    • 14-Bit, 0.25°C Resolution Converter
    • Integrated Cold-Junction Compensation
    • Versions Available for Most Common Thermocouple Types: K-, J-, N-, T-, S-, R-, and E-Type
    • Detects Thermocouple Shorts to GND or VCC
    • Detects Open Thermocouple
  • Interfaces to Most Microcontrollers
    • Simple SPI-Compatible Interface (Read-Only)
Additional Details
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The MAX31855 performs cold-junction compensation and digitizes the signal from a K-, J-, N-, T-, S-, R-, or E-type thermocouple. The data is output in a signed 14-bit, SPI-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1800°C and as low as -270°C, and exhibits thermocouple accuracy of ±2°C for temperatures ranging from -200°C to +700°C for K-type thermocouples. For full range accuracies and other thermocouple types, see the Thermal Characteristics specifications in the full data sheet.

FAQs: MAX31855 FAQs: MAX31855

Applications

  • Appliances
  • Automotive
  • HVAC
  • Industrial
Part Models 14
1ku List Price Starting From $4.09

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX31855EASA+
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MAX31855EASA+T
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MAX31855JASA+
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MAX31855JASA+T
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MAX31855KASA+
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MAX31855KASA+T
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MAX31855NASA+
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MAX31855NASA+T
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MAX31855RASA+
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MAX31855RASA+T
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MAX31855SASA+
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MAX31855SASA+T
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MAX31855TASA+
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MAX31855TASA+T
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Product Lifecycle

PCN

May 22, 2018

- 1702N

ASSEMBLY

MAX31855EASA+

PRODUCTION

MAX31855EASA+T

PRODUCTION

MAX31855JASA+

PRODUCTION

MAX31855JASA+T

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MAX31855RASA+

PRODUCTION

MAX31855RASA+T

PRODUCTION

Oct 30, 2020

- 1702R2

ASSEMBLY

MAX31855KASA+

PRODUCTION

MAX31855KASA+T

PRODUCTION

MAX31855NASA+

PRODUCTION

MAX31855NASA+T

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MAX31855SASA+

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MAX31855SASA+T

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MAX31855TASA+

PRODUCTION

MAX31855TASA+T

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

May 22, 2018

- 1702N

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ASSEMBLY

MAX31855EASA+

PRODUCTION

MAX31855EASA+T

PRODUCTION

MAX31855JASA+

PRODUCTION

MAX31855JASA+T

PRODUCTION

MAX31855RASA+

PRODUCTION

MAX31855RASA+T

PRODUCTION

Oct 30, 2020

- 1702R2

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ASSEMBLY

MAX31855KASA+

PRODUCTION

MAX31855KASA+T

PRODUCTION

MAX31855NASA+

PRODUCTION

MAX31855NASA+T

PRODUCTION

MAX31855SASA+

PRODUCTION

MAX31855SASA+T

PRODUCTION

MAX31855TASA+

PRODUCTION

MAX31855TASA+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 3

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MAX31855PMB1

MAX31855PMB1 Peripheral Module

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MAX31855PMB1

MAX31855PMB1 Peripheral Module

MAX31855PMB1 Peripheral Module

Features and Benefits

  • Converts Output of a K-Type Thermocouple Directly to a Signed 14-Bit Digital Word
  • Cold-Junction Compensation
  • 14-Bit, 0.25°C Resolution
  • Detects Thermocouple Shorts to GND or VCC
  • Detects Open Thermocouple
  • 6-Pin Pmod-Compatible Connector (SPI)
  • Example Software Written in C for Portability
  • RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX31855PMB1 peripheral module provides the necessary hardware to interface the MAX31855 cold-junction compensated thermocouple-to-digital converter to any system that utilizes Pmod™-compatible expansion ports. The IC performs cold-junction compensation and digitizes the signal from a thermocouple. Versions of the IC are available that operate with a K-, J-, N-, T-, R-, or E-type thermocouple. This module is set up to operate with a K-type thermocouple. The data is output in a signed 14-bit, SPI-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1800°C and as low as -270°C, and exhibits thermocouple accuracy of ±2°C for temperatures ranging from -200°C to +700°C for K-type thermocouples.
For full range accuracies, other thermocouple types, and detailed information regarding operation of the IC, refer to the MAX31855 IC data sheet.
Note: K-type thermocouple is not included with Maxim Peripheral Module collections.

Applications

  • Appliances
  • Automotive
  • HVAC
  • Industrial Equipment

MAXPMBAE

Maxim Analog Essentials Collection of Peripheral Modules

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MAXPMBAE

Maxim Analog Essentials Collection of Peripheral Modules

Maxim Analog Essentials Collection of Peripheral Modules

Features and Benefits

  • Data Converter, Interface, Clock, Sensor, and Other Modules Included to Address Many Design Needs
  • Plug in Modules Enable Rapid Hardware Prototyping
  • Proven Software Drivers Reduce Development Time
  • FPGA Configuration Files Included to Simplify Design Effort

Product Detail

Maxim Analog Essentials is a collection of peripheral modules which can plug directly into any FPGA/CPU expansion port which follows the Pmod™ standard established by Digilent, Inc. The collection includes modules containing a wide variety of commonly used analog and mixed signal functions. The modules are supported by software which includes FPGA configuration files for three popular FPGA platforms: Avnet LX-9, Digilent Nexys 3 and Avnet ZEDBoard, as well as example programs to exercise and demonstrate each module. While the example programs demonstrate the module’s functionality, they are well partitioned and documented allowing the core routines to be easily cut and pasted into your own programs. The combination of plug-in simplicity and easy software integration allows for quick migration from idea to working prototype.

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MAX31855EVKIT

Evaluation Kit for the MAX31855

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MAX31855EVKIT

Evaluation Kit for the MAX31855

Evaluation Kit for the MAX31855

Features and Benefits

  • Includes Everything Needed to Evaluate a K-Type Thermocouple
  • EV Kit Hardware is USB Powered (USB Cable Included)
  • Windows XP®, Windows Vista®, and Windows® 7 Operating Systems-Compatible Software
  • USB HID Interface
  • Graphical User Interface (GUI) Consists of a Single .EXE File
  • Second Channel Allows Easy Evaluation of Other Thermocouple Types
  • RoHS Compliant

Product Detail

The MAX31855 evaluation kit (EV kit) provides the hardware and software (GUI) necessary to evaluate the MAX31855 cold-junction compensated thermocouple-to-digital converter.
The MAX31855 EV kit comes with a MAX31855KASA+ soldered to the PCB. This is the K-type thermocouple version of the MAX31855. Other thermocouple types can be evaluated by procuring the desired thermocouple, thermocouple socket, and corresponding MAX31855. Contact the factory for free samples of the MAX31855 to match your desired thermocouple type. See the Evaluating Other Thermocouple Types section in the full data sheet for part numbers and additional information regarding other thermocouple types.

Applications

  • Appliances
  • Automotive
  • HVAC
  • Industrial

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