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MAX6675

Cold-Junction-Compensated K-Thermocouple-to-Digital Converter (0°C to +1024°C)

Overview

Technical Documents

Ordering Info

Status

All versions are Not Recommended for New Designs. See Ordering Information for recommended replacements.

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 8 LSBs for temperatures ranging from 0°C to +700°C.

The MAX6675 is available in a small, 8-pin SO package.

Data Sheet

Download	Rev 1	(PDF, 144kB)
E-Mail

An evaluation kit is available: MAX6675EVKIT

Key Features

Cold-Junction Compensation
Simple SPI-Compatible Serial Interface
12-Bit, 0.25°C Resolution
Open Thermocouple Detection

Applications/Uses

Appliances
Automotive Electronics
HVAC
Industrial

Diagram

Typical Application Circuit

Application Notes

Application Note 687		Distributed Temperature Sensing Improves Reliability
Application Note 3229		Selecting Temperature Sensors for System Measurement and Protection
Application Note 4026		Implementing Cold-Junction Compensation in Thermocouple Applications
Application Note 4433		Circuit Digitizes Thermocouple Output near Sensing Point
Tutorial 4679		Thermal Management Handbook

Product Guides

Thermal Management (PDF)

Reliability Reports

Reliability Report:	MAX6675.pdf
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Software/Models

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Ordering Information

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Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6675ISA			NRND	MAX31855KASA+	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6675ISA+			NRND	MAX31855KASA+	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6675ISA+T			NRND	MAX31855KASA+	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6675ISA-T			NRND	MAX31855KASA+	N.SO;8 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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MAX6675EVKIT

MAX6675 Evaluation Kit

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