19-2345; Rev 0; 02/02
MAX6675 Evaluation Kit
General Description
Features
The MAX6675 evaluation kit (EV kit) is an assembled
and tested PC board that demonstrates the MAX6675
thermocouple digital temperature sensor. It accepts the
input from a type-K thermocouple and converts the
temperature to 12-bit data.
ꢀ Digitizes and Displays Temperature from a
Type-K Thermocouple
ꢀ SPI™-Compatible Serial Interface
ꢀ Easy-to-Use Menu-Driven Software
ꢀ Available in an 8-Pin SO Package
ꢀ Assembled and Tested
The MAX6675 EV kit connects to a computer for acquir-
ing the data from the MAX6675. Windows® 95/98/2000-
compatible software provides a user-friendly interface
to display the 12-bit data and convert it to a tempera-
ture.
ꢀ Includes Windows 95/98/2000-Compatible
Software, Demo PC Board, and Type-K
Thermocouple
The EV kit includes a type-K thermocouple for evalua-
tion up to +80°C.
To evaluate the MAX6674, order a free sample of the
MAX6674ISA.
Ordering Information
Component List
PART
TEMP RANGE
IC PACKAGE
DESIGNATION QTY
DESCRIPTION
MAX6675EVKIT
0°C to +70°C
8 SO
0.1µF, 16V X7R ceramic capacitors
Taiyo Yuden EMK107BJ104KA
Murata GRM188R71C104KA01
TDK C1608X7R1C104K
C1–C4
4
1
Quick Start
Required Equipment
Before you begin, the following equipment is needed:
2.2µF, 16V X7R ceramic capacitor
Taiyo Yuden EMK316BJ225ML
Murata GRM42-6X7R225K016
TDK C3216X7R1C225M
C5
•
Computer running Windows 95, 98, or 2000 (Note:
Windows 2000 requires the installation of a driver;
refer to Win2000.pdf or Win2000.txt located on the
diskette.)
J1
J2
1
1
DB-25 male right-angle connector
Thermocouple connector, miniature
size, type K
Omega PCC-SMP-K
•
•
Parallel printer port (this is a 25-pin socket on the
back of the computer)
Standard 25-pin, straight-through, male-to-female
cable (printer extension cable) to connect the com-
puter’s parallel port to the MAX6675 EV kit
JU1–JU5
R1
0
1
1
Not installed
470k
5% resistor
•
DC power supply capable of supplying any voltage
between 7V and 20V at 100mA
U1
MAX6675ISA temperature sensor
MAX1840EUB/MAX1841EUB level
translator
U2
U3
1
1
Procedure
Do not turn on the power until all connections are
made.
MAX1615EUK linear voltage
regulator
1) Connect a cable from the computer’s parallel port
to the MAX6675 EV kit. Use a straight-through 25-
pin female-to-male cable. To avoid damaging the
EV kit or your computer, do not use a 25-pin SCSI
port or any other connector that is physically similar
to the 25-pin parallel printer port.
Thermocouple, epoxy-coated tip,
-10°C to +80°C, miniature-size
male connector, type K
None
1
Omega TC-PVC-K-24-180
Windows is a registered trademark of Microsoft Corp.
SPI is a trademark of Motorola, Inc.
________________________________________________________________ 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.