How to use MAX6675 thermocouple k type with Arduino
Temp Sensor Digital Serial (SPI) 8-Pin SOIC N T/R
This article will unlock more details about MAX6675, a cold-junction-compensated k-thermocouple to-digital converter.
MAX6675 Type-K Thermocouple Converter : Datasheet, Pinout, Comparison
emp Sensor Digital Serial (SPI) 8-Pin SOIC N T/R This article will unlock more details about MAX6675, a cold-junction-compensated k-thermocouple to-digital converter.
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Sep 7, 2021
Kevin Thorndike
MAX6675ISA T
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Min.: 1 Mult.: 1
| Quantity | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.82326 | $2.82 |
| 10+ | $2.66345 | $26.63 |
| 100+ | $2.51269 | $251.27 |
| 500+ | $2.37046 | $1185.23 |
| 1000+ | $2.23629 | $2236.29 |
Unit Price:$2.82326
Subtotal: $2.82
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MAX6675 Pinout
| Pin | Pin Name | Function |
| 1 | GND | Ground |
| 2 | T. | Alumel Lead of Type-K Thermocouple.Should be connected to the ground externally. |
| 3 | T+ | Chrome Lead of TypeK Thermocouple |
| 4 | Vcc | Positive Supply. Bypass with a 0.1μF capacitor to GND. |
| 5 | SCK | Serial Clock Input |
| 6 | Cs | Chip Select Set CS low to enable the serial interface. |
| 7 | SO | Serial Data Output |
| 8 | N.C. | No Connection |
Pin Description
MAX6675 CAD Model
Symbol
Symbol
Footprint
Footprint
3D Model
3D Model
Specifications
Maxim Integrated MAX6675ISA+T technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated MAX6675ISA+T.
MAX6675ISA T Tech Specifications
MAX6675ISA T Tech Specifications
Maxim Integrated MAX6675ISA T technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated MAX6675ISA T.
| Product Attribute | Attribute Value | |
|---|---|---|
| Factory Lead Time | 10 Weeks | |
| Contact Plating | Tin | |
| Mount | Surface Mount | |
| Mounting Type | Surface Mount | |
| Package / Case | 8-SOIC (0.154, 3.90mm Width) | |
| Number of Pins | 8Pins | |
| Operating Temperature | -20°C~85°C | |
| Packaging | Tape & Reel (TR) | |
| Published | 2002 | |
| JESD-609 Code | e3 | |
| Pbfree Code | yes | |
| Part Status | Active | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Attribute | Attribute Value | |
|---|---|---|
| Number of Terminations | 8Terminations | |
| ECCN Code | EAR99 | |
| Type | Thermocouple to Digital Converter | |
| Terminal Position | DUAL | |
| Terminal Form | GULL WING | |
| Peak Reflow Temperature (Cel) | 260 | |
| Number of Functions | 1Function | |
| Supply Voltage | 3.3V | |
| Terminal Pitch | 1.27mm | |
| Base Part Number | MAX6675 | |
| Pin Count | 8 | |
| Output Type | Digital | |
| Operating Supply Voltage | 5.5V |
| Product Attribute | Attribute Value | |
|---|---|---|
| Supply Voltage-Min (Vsup) | 3V | |
| Interface | SPI, Serial | |
| Operating Supply Current | 1.5mA | |
| Nominal Supply Current | 700μA | |
| Input Type | Thermocouple (K) | |
| Resolution | 1.5 B | |
| Height | 1.5mm | |
| Length | 5mm | |
| Width | 4mm | |
| Radiation Hardening | No | |
| RoHS Status | ROHS3 Compliant | |
| Lead Free | Lead Free |
MAX6675 Description
The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. The data is output in a 12-bit resolution, SPI™-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1024°C, and exhibits thermocouple accuracy of 8LSBs for temperatures ranging from 0°C to +700°C.
The MAX6675 is a sophisticated thermocouple-to-digital converter with a built-in 12-bit analog-to-digital converter (ADC). The MAX6675 also contains cold-junction compensation sensing and correction, a digital controller, an SPI-compatible interface, and associated control logic.
MAX6675 Features
● Direct Digital Conversion of Type -K Thermocouple Output
● Cold-Junction Compensation
● Simple SPI-Compatible Serial Interface
● 12-Bit, 0.25°C Resolution
● Open Thermocouple Detection
MAX6675 Block Diagram
MAX6675 Typical Application Circuit
The Typical Application Circuit shows the MAX6675 interfaced with a microcontroller. In this example, the MAX6675 processes the reading from the thermocouple and transmits the data through a serial interface. Force CS low and apply a clock signal at SCK to read the results at SO. Forcing CS low immediately stops any conversion process. Initiate a new conversion process by forcing CS high.
MAX6675 Typical Application Circuit
MAX6675 vs. MAX31855
| Parts | MAX6675 | MAX31855 |
| Pb-free Code | No | Yes |
| Rohs Code | No | Yes |
| Part Life Cycle Code | Obsolete | Active |
| Ihs Manufacturer | MAXIM INTEGRATED PRODUCTS INC | MAXIM INTEGRATED PRODUCTS INC |
| Part Package Code | SOIC | SOIC |
| Package Description | SOP, | SOP, SOP8,.25 |
| Pin Count | 8 | 8 |
| Reach Compliance Code | not_compliant | compliant |
| ECCN Code | EAR99 | EAR99 |
| HTS Code | 8542.39.00.01 | 8542.39.00.01 |
| Factory Lead Time | 1 Week | 7 Weeks |
| Samacsys Description | IC THERMOCOUPLE TO DGTL 8-SONIC | MAX31855KASA+, 14-bit Temperature Sensor ±2 °C SPI 3 → 3.6 V 8-Pin SOIC |
| Samacsys Manufacturer | Maxim Integrated | Maxim Integrated |
| Analog IC - Other Type | ANALOG CIRCUIT | ANALOG CIRCUIT |
| JESD-30 Code | R-PDSO-G8 | R-PDSO-G8 |
| JESD-609 Code | e0 | e3 |
| Length | 4.9 mm | 4.9 mm |
| Moisture Sensitivity Level | 1 | 1 |
| Number of Functions | 1 | 1 |
| Number of Terminals | 8 | 8 |
| Operating Temperature-Max | 85 °C | 125 °C |
| Operating Temperature-Min | -20 °C | -40 °C |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Code | SOP | SOP |
| Package Shape | RECTANGULAR | RECTANGULAR |
| Package Style | SMALL OUTLINE | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 245 | NOT SPECIFIED |
| Qualification Status | Not Qualified | Not Qualified |
| Seated Height-Max | 1.75 mm | 1.75 mm |
| Supply Voltage-Max (Vsup) | 5.5 V | 3.6 V |
| Supply Voltage-Min (Vsup) | 3 V | 3 V |
| Supply Voltage-Nom (Vsup) | 3.3 V | 3.3 V |
| Surface Mount | YES | YES |
| Technology | BICMOS | |
| Temperature Grade | OTHER | AUTOMOTIVE |
| Terminal Finish | Tin/Lead (Sn/Pb) | Matte Tin (Sn) |
| Terminal Form | GULLWING | GULLWING |
| Terminal Pitch | 1.27 mm | 1.27 mm |
| Terminal Position | DUAL | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED | NOT SPECIFIED |
| Width | 3.9 mm | 3.9 mm |
| Base Number Matches | 4 | 2 |
| Package Equivalence Code | SOP8,.25 | |
| Power Supplies | 3.3 V | |
| Supply Current-Max (Isup) | 1.5 mA |
MAX6675 Manufacturer
Maxim Integrated Products, Inc. designs, develops, manufactures, and markets linear and mixed-signal integrated circuits. The Company offers switching regulators, battery management, amplifiers, data converters, filters, opticals, and memory products.
Datasheet PDF
MAX6675ISA T Documents
MAX6675ISA T Documents
Download datasheets and manufacturer documentation for MAX6675ISA T
Application Notes
Circuit Digitizes Thermocouple Output Near Sensing Point
ConflictMineralStatement
Maxim-Integrated-company-65.pdf
Frequently Asked Questions
What difference is between MAX6675 and MAX31855?
The MAX6675 outputs 12 bits of data. The MAX31855 outputs 14 bits. That would indicate that the MAX31855 is more accurate. However, it has a wider range -250 to +1600 rather than 0 to 1024. So it has about 1 bit more resolution in practice. "1 bit" means it can see changes half the size of what the other can detect.
What is the max6675 designed to?
The MAX6675 is designed to work in conjunction with an external microcontroller (µC) or other intelligence in thermostatic, process-control, or monitoring applications.
How does the MAX6675 perform?
The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. The data is output in a 12-bit resolution, SPI™-compatible, read-only format.
What package is the MAX6675 available in?
The MAX6675 is available in a small, 8-pin SO package.
FAQ
What difference is between MAX6675 and MAX31855?
The MAX6675 outputs 12 bits of data. The MAX31855 outputs 14 bits. That would indicate that the MAX31855 is more accurate. However, it has a wider range -250 to +1600 rather than 0 to 1024. So it has about 1 bit more resolution in practice. "1 bit" means it can see changes half the size of what the other can detect.
What is the max6675 designed to?
The MAX6675 is designed to work in conjunction with an external microcontroller (µC) or other intelligence in thermostatic, process-control, or monitoring applications.
How does the MAX6675 perform?
The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. The data is output in a 12-bit resolution, SPI™-compatible, read-only format.
What package is the MAX6675 available in?
The MAX6675 is available in a small, 8-pin SO package.
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