Instant Quote

Home > Integrated Circuits ICs > MAX31855KASA+

MAX31855KASA+

Thermocouple-to-digital converter, Type K, 14-bit, SPI, SOIC-8

7213

Effective Inventory
Go to Inquiry

Image for reference only

Manufacturer Part：

MAX31855KASA+

Package：

SOIC-8 (5.0 x 3.9 mm)

Brand：
Product Categories：
Quality Commitment
Shipping & Payment
Service & Packaging
Product Manual
Other recommendations you may be interested in.

STM32F767ZIT6

NC7SZ32M5X

BQ76952PFBR

MCP4922-E/SL

FT230XS-R

BQ24192IRGER

TLV2211IDBVR

TLP185GB

Description

Product Overview

The MAX31855KASA+ is a cold-junction compensated thermocouple-to-digital converter from Analog Devices (formerly Maxim Integrated). It digitizes the signal from a Type K thermocouple with 14-bit resolution, measures the cold-junction temperature with 12-bit resolution, and outputs data via SPI interface in an 8-pin SOIC package.

Key Specifications

Thermocouple Type Type K
Thermocouple Range -270C to +1800C
Cold-Junction Range -40C to +125C
Thermocouple Resolution 14-bit (0.25C)
Cold-Junction Resolution 12-bit (0.0625C)
Accuracy (Type K) +/-2C (0C to +700C)
Interface SPI (read-only)
Supply Voltage 3.0V to 3.6V
Supply Current 900 uA typical
Package SOIC-8 (5.0 x 3.9 mm)

Features

  • Cold-junction compensation integrated on-chip
  • 14-bit thermocouple temperature data (0.25C resolution)
  • 12-bit cold-junction temperature data (0.0625C resolution)
  • SPI-compatible read-only interface
  • Open thermocouple detection bit
  • Fault detection: open, short to GND, short to VCC

Applications

  • Industrial temperature measurement and control
  • Oven and furnace monitoring
  • 3D printer hot-end temperature sensing
  • Appliance temperature monitoring

The MAX31855KASA+ from Analog Devices is a sophisticated cold-junction compensated thermocouple-to-digital converter designed specifically for Type K thermocouples. It integrates a low-noise amplifier, ADC, cold-junction temperature sensor, and SPI interface into a single 8-pin SOIC package. The device provides 14-bit (0.25C) resolution for thermocouple measurement and 12-bit (0.0625C) resolution for cold-junction compensation, delivering a fully digitized temperature output with no external signal conditioning required. Built-in fault detection identifies open thermocouple, short to GND, and short to VCC conditions.

The MAX31855KASA+ operates by simultaneously measuring the thermocouple voltage and the cold-junction (reference junction) temperature. A precision low-noise amplifier amplifies the small thermocouple Seebeck voltage, which is then digitized by a 14-bit sigma-delta ADC. The integrated cold-junction temperature sensor measures the reference junction at the connector point with 12-bit resolution. The device automatically performs cold-junction compensation in the digital domain, calculating the true thermocouple hot-junction temperature using the measured thermocouple voltage and cold-junction temperature. Temperature data is output through a read-only SPI interface as a 32-bit word containing thermocouple temperature, reference junction temperature, and fault status bits.

Pin Name Type Function
1 GND Ground Ground reference
2 T+ Analog Input Thermocouple non-inverting input
3 T- Analog Input Thermocouple inverting input
4 VCC Power Supply voltage 3.0-3.6V
5 SCK Input SPI clock input
6 CS# Input Chip select (active low)
7 SO Output SPI data output
8 NC – No connect
  • Industrial oven and furnace temperature monitoring
  • 3D printer hot-end and heated bed temperature control
  • HVAC and building automation temperature sensing
  • Appliance temperature measurement and safety cutoff
  • Laboratory and scientific temperature measurement
Manufacturer Part Number Package Notes
ADI MAX31855JASA+ SOIC-8 Type J thermocouple version
ADI MAX31855RASA+ SOIC-8 Type R thermocouple version
ADI MAX31855TASA+ SOIC-8 Type T thermocouple version
ADI MAX31856MUD+ TSSOP-14 Universal, supports all thermocouple types
Microchip MCP9600T-E/MX QFN-20 Universal thermocouple EMF to digital converter
Recommend Parts

ADE7953ACPZ-RL

Single-phase metering IC, 0.1% error, neutral current, SPI/I2C/UART, LFCSP-28

Brand:

Package:

LFCSP-28 (5 x 5 x 0.75 mm, with exposed pad)
In stock:
2986pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD826ARZ-REEL7

Dual high-speed op-amp, 50 MHz, 350 V/us, 50 mA output, SOIC-8

Brand:

Package:

SOIC-8 (5.0 x 3.9 mm)
In stock:
4517pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD5231BRUZ10-REEL7

1024-position nonvolatile digital potentiometer, 10kΩ, SPI, EEMEM, 16-TSSOP, REEL7 packaging

Brand:

Package:

16-TSSOP (5.0×4.4mm)
In stock:
9739pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD202JN

Transformer-coupled isolation amplifier, 750Vrms isolation, 2kHz bandwidth, 10-DIP, with integrated isolated power

Brand:

Package:

10-Pin DIP
In stock:
14100pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD7891AS1

8-ch 12-bit 454kSPS ADC DAS, bipolar inputs, parallel/serial, 44-MQFP, 5V supply

Brand:

Package:

MQFP-44 (10 x 10 mm)
In stock:
9131pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD7226KRZ

Quad 8-bit voltage output DAC, 4-channel, MPU-compatible, 20-SOIC, no external trims

Brand:

Package:

SOIC-20 (Wide) (7.5 x 12.8 mm)
In stock:
5393pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry
Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Company
insights
Industries
All Products
Integrated Circuits
C&I Devices
Discrete
Memory Chips
MPUs & MCUs