MAX6675 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Cold-Junction-Compensated K-Thermocoupleto-Digital Converter (0°C to +1024°C)

19-2235; Rev 1; 3/02
Cold-Junction-Compensated K-Thermocouple-
to-Digital Converter (0°C to +1024°C)
General 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™-compati-
ble, read-only format.
This converter resolves temperatures to 0.25°C, allows
readings as high as +1024°C, and exhibits thermocou-
ple accuracy of 8LSBs for temperatures ranging from
0°C to +700°C.
The MAX6675 is available in a small, 8-pin SO package.
Industrial
Appliances
HVAC
Automotive
Applications
SPI is a trademark of Motorola, Inc.
Features
o Direct Digital Conversion of Type -K
Thermocouple Output
o Cold-Junction Compensation
o Simple SPI-Compatible Serial Interface
o 12-Bit, 0.25°C Resolution
o Open Thermocouple Detection
PART
MAX6675ISA
TOP VIEW
Ordering Information
TEMP RANGE
-20°C to +85°C
PIN-PACKAGE
8 SO
Pin Configuration
GND 1
T- 2
T+ 3
V_CC 4
MAX6675
8 N.C.
7 SO
6 CS
5 SCK
SO
Typical Application Circuit
Vcc
0.1µF
MAX6675
GND
SO
T+
SCK
T-
CS
MICROCONTROLLER
68HC11A8
MISO
SCK
SSB
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.