MAX6674 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Cold-Junction-Compensated K-Thermocouple to-Digital Converter (0°C to +128°C)

19-2241; Rev 1; 8/02
Cold-Junction-Compensated K-Thermocouple-
to-Digital Converter (0°C to +128°C)
General Description
The MAX6674 cold-junction-compensation thermocou-
ple-to-digital converter performs cold-junction compen-
sation and digitizes the signal from a type-K
thermocouple. The data is output in a 10-bit resolution,
SPI™-compatible, read-only format.
This converter resolves temperatures to 0.125°C, allows
readings as high as +128°C, and exhibits thermocouple
accuracy of ±2°C for temperatures ranging from 0°C to
+125°C.
The MAX6674 is available in a small, 8-pin SO package.
o Cold-Junction Compensation
Features
o Simple SPI-Compatible Serial Interface
o 10 Bit, 0.125°C
o Open Thermocouple Detection
PART
MAX6674ISA
Ordering Information
TEMP RANGE
-20°C to +85°C
PIN-PACKAGE
8 SO
Industrial
Appliances
HVAC
Automotive
Applications
SPI is a trademark of Motorola, Inc.
TOP VIEW
Pin Configuration
GND 1
T- 2
T+ 3
V_CC 4
MAX6674
8 N.C.
7 SO
6 CS
5 SCK
SO
Vcc
0.1µF
MAX6674
GND
SO
T+
SCK
T-
CS
Typical Application Circuit
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.