MAX6675EVKIT Maxim Integrated Products, MAX6675EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX6675EVKIT
• Description: EVAL KIT FOR MAX6675
• Manufacturer: Maxim Integrated Products

Specifications of MAX6675EVKIT

• Sensor Type: Temperature, Thermocouple
• Interface: SPI
• Sensitivity: ±0.25°C
• Voltage - Supply: 3 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: MAX6675
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensing Range: -

2) Visit the Maxim website (www.maxim-ic.com/
3) Connect the 7V to 20V supply to the pads labeled
4) Turn on the power supply.
5) Start the MAX6675 program by opening its icon in
6) Observe as the program automatically detects the
The user interface is easy to operate. Use either the
mouse or the Tab key to navigate.
Note: Words in boldface are user-selectable features in
the software.
The program continually polls the device for new tem-
perature data. To disable the continuous polling of
data, uncheck the Automatic Read checkbox. Press
Read Temp to get the current temperature.
Check the Data Logging checkbox to activate data log-
ging. Data logging saves temperature and status data
to a text file that includes a time/date stamp next to
each data point. If Automatic Read is enabled, data is
sampled at 1Hz; however, the data is logged to the file
MAX6675 Evaluation Kit
Note: Indicate that you are using the MAX6675 when contacting these component suppliers.
2
Murata Mfg. Co., Ltd.
Omega Engineering
Taiyo Yuden
TDK Corp.
evkitsoftware) to download the latest version of the
EV kit software, 6675Rxx.ZIP. Install the MAX6675
evaluation software on your computer by running the
INSTALL.EXE program. The program files are
copied and icons are created in the Windows Start
menu. When you see the self-extracting DLPortIO
driver install window appear on the screen, press
the Yes button. This automatically unpacks the com-
pressed files and runs the DLPortIO driver installer.
If using Windows 2000 or XP, you must have admin-
istrator privileges on your PC. If you do not, contact
your system administrator to allow installation. You
need to restart your PC after installing the DLPortIO
driver.
VIN and GND.
the Start menu.
MAX6675 and starts the main program (Figure 1).
_______________________________________________________________________________________
SUPPLIER
Detailed Description
User-Interface Panel
770-436-1300
888-826-6342
800-348-2496
847-803-6100
Data Logging
PHONE
only if the temperature changes. This slows the growth
of the data-logging file. When Automatic Read is dis-
abled, the data is logged each time the Read Temp
button is clicked. To stop data logging, uncheck the
Data Logging checkbox.
There are two methods for communicating with the
MAX6675: through the user-interface panel or through
the general-purpose SPI utility. This utility (Figure 2)
configures SPI parameters such as clock polarity
(CPOL), clock phase (CPHA), and chip-select (CS)
polarity.
The fields where pin numbers are required apply to the
pins of the parallel port connector.
The utility handles the data only in byte (8-bit) format.
Data longer than 1 byte must be handled as multiple
bytes. For example, a 16-bit word should be broken
into two 8-bit bytes.
To write data to the slave device, enter the data into the
field labeled: Data bytes to be written. Each data byte
should be hexadecimal, prefixed by 0x, and separated
with a comma. Press the Send Now button to write the
data to the slave. Note: The MAX6675 is a read-only
device and cannot be written to.
To read data from the slave device, the field: Data
bytes to be written: must contain hexadecimal values,
includes the same number of bytes as to be read from
the slave. For example, to read 16-bit data from the
MAX6675, 2 bytes must be written, each prefixed by 0x
and separated by a comma (default is 0x00, 0x00).
Note: When using the SPI utility, uncheck the
Automatic Read checkbox in the main display.
The MAX6675 EV kit is configured for operating at 5V.
To evaluate the MAX6675 at a lower supply voltage, cut
the traces shorting the pins of JU1. Apply the desired
voltage (between 3V and 5V) to the VCC pad. Note: A
7V to 20V supply must be connected to VIN to power
the MAX1840 level translator.
Evaluating with a Lower Supply Voltage
770-436-3030
847-925-0899
847-390-4405
FAX
—
General-Purpose SPI Utility
Component Suppliers
www.murata.com
www.omega.com
www.t-yuden.com
www.component.tdk.com
WEBSITE