19-2343; Rev 1; 3/07
MAX6683 Evaluation System/Evaluation Kit
Evaluate: MAX6652/MAX6683
General Description
The MAX6683 evaluation system (EV system) consists
of a MAX6683 evaluation kit (EV kit) and a companion
Maxim CMODUSB board.
The MAX6683 EV kit is an assembled and tested print-
ed circuit board (PCB) that demonstrates the MAX6683
temperature sensor and system monitor. The MAX6683
monitors temperature, supply voltage, and the voltage
of three external supplies. Temperature is converted to
11-bit serial data and voltage to 8-bit data.
The CMODUSB allows a PC to use its USB port to emu-
late an Intel SMBus. Windows
®
98SE/2000/XP-compati-
ble software provides a user-friendly interface to
exercise the features of the MAX6683. The program is
menu driven and offers a graphic interface with control
buttons and status display.
Order the EV system (MAX6683EVCMODU) for a com-
plete PC-based evaluation of the MAX6683. Order just the
EV kit (MAX6683EVKIT) if you already have an SMBus
interface.
To evaluate the MAX6652, order a free sample of the
MAX6652AUB.
Features
♦
Measure and Display the MAX6683 Temperature
♦
Monitor Four Voltage Channels
Three External (1.8V, 2.5V, and 5V Nominal)
V
CC
Pin (3.3V Nominal)
♦
Programmable Alarms and Configuration
♦
SMBus/I
2
C Compatible
♦
Easy-to-Use Menu-Driven Software
♦
Fully Assembled and Tested
♦
Include Windows 98SE/2000/XP-Compatible
Software and Demo PCB
♦
EV System Includes USB Connectivity
Ordering Information
PART
MAX6683EVKIT
MAX6683EVCMODU
TEMP
RANGE
0°C to +70°C
0°C to +70°C
INTERFACE
TYPE
Not included
CMODUSB
Note:
The MAX6683 EV kit software is provided with the
MAX6683EVKIT. However, the CMODUSB board is required to
interface the EV kit to the computer when using the software.
Component Lists
MAX6683 EV System
PART
MAX6683EVKIT
CMODUSB+
QTY
1
1
DESCRIPTION
MAX6683 evaluation kit
Serial interface board
C1, C2
2
DESIGNATION
QTY
MAX6683 EV Kit
DESCRIPTION
0.1µF, 16V X7R ceramic capacitors
Taiyo Yuden EMK107BJ104KA
Murata GRM188R71C104KA01
TDK C1608X7R1C104K
2.2µF, 16V X7R ceramic capacitor
Taiyo Yuden EMK316BJ225ML
Murata GRM42-6X7R225K016
TDK C3216X7R1C225M
2
✕
10 right-angle female
2
✕
4 straight header
Not installed
10kΩ ±5% resistors
470kΩ ±5% resistor
Slide switch
MAX6683AUB
MAX1615EUK
Shunt for JU1
PCB: MAX6683 Evaluation Kit
+Denotes
lead-free and RoHS compliance.
C3
1
J1
JU1
JU2
R1, R2, R3
R4
1
1
0
3
1
1
1
1
1
1
SMBus is a trademark of Intel Corp.
Windows is a registered trademark of Microsoft Corp.
SW1
U1
U2
—
—
________________________________________________________________
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.
MAX6683 Evaluation System/Evaluation Kit
Evaluate: MAX6652/MAX6683
Component Suppliers
SUPPLIER
Murata Mfg. Co., Ltd.
Taiyo Yuden
TDK Corp.
PHONE
770-436-1300
800-348-2496
847-803-6100
FAX
770-436-3030
847-925-0899
847-390-4405
WEBSITE
www.murata.com
www.t-yuden.com
www.component.tdk.com
Note:
Indicate that you are using the MAX6683 when contacting these component suppliers.
Quick Start
Recommended Equipment
• MAX6683 EV system
MAX6683 EV kit
Maxim CMODUSB interface board
USB cable (included with the CMODUSB)
• A user-supplied Windows 98SE/2000/XP PC with
spare USB port
• 3.3V power supply for VCC
• 1.8V power supply*
• 2.5V power supply*
• 5V power supply*
Note:
In the following sections, software-related items
are identified by bolding. Text in
bold
refers to items
directly from the EV kit software. Text in
bold and under-
lined
refers to items from the Windows 98SE/2000/XP
operating system.
Procedure
The MAX6683 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power supplies until all
connections are completed.
1) Visit the Maxim website (www.maxim-ic.com/evkit-
software) to download the latest version of the EV
kit software, 6683Rxx.ZIP.
2) Install the MAX6683 EV kit software on your com-
puter by running the INSTALL.EXE program. The
program files are copied and icons are created in
the Windows
Start
menu.
3) Carefully connect the boards by aligning the 20-pin
connector of the MAX6683 EV kit with the 20-pin
header of the CMODUSB interface board. Gently
press them together.
4) Ensure that a shunt is on pins 1-2 of jumper JU4.
Do not turn on the power until all connections are
made.
5) Connect the 3.3V power supply to the VCC and
GND pads.
6) Connect the 1.8V nominal power supply to the 1.8
VIN and GND pads.
7) Connect the 2.5V nominal power supply to the 2.5
VIN and GND pads.
8) Connect the 5V nominal power supply to the 5 VIN
and GND pads.
9) Connect the USB cable from the PC to the
CMODUSB board. A
Building Driver Database
window pops up in addition to a
New Hardware
Found
message. If you do not see a window that is
similar to the one described above after 30
seconds, remove the USB cable from the
CMODUSB and reconnect it. Administrator
privileges are required to install the USB device
driver on Windows 98SE/2000/XP. Refer to the
TROUBLESHOOTING_USB.PDF document in-
cluded with the software if you have any
problems during this step.
10) Follow the directions of the
Add New Hardware
Wizard
to install the USB device driver. Choose the
Search for the best driver for your device
option.
Specify the location of the device driver to be
C:\Program Files\MAX6683
(or the directory cho-
sen during installation) using the
Browse
button.
11) Turn on the power supplies.
12) Turn on the EV kit by moving SW1 to the ON posi-
tion.
13) Start the MAX6683 EV kit software by clicking on its
icon in the
Start
menu.
14) Wait until the program automatically detects the
address of the MAX6683 and displays the user-
interface panel (Figure 1).
15) Select the
Configuration
tab on the panel (Figure
2). Uncheck the
Interrupt Clear
checkbox.
16) Check the
START
checkbox.
17) Verify that the internal temperature displayed on the
user-interface panel is not 0.000°C.
*These
supplies are optional; however, if different nominal supplies are used, appropriate threshold values should be programmed.
2
_______________________________________________________________________________________
MAX6683 Evaluation System/Evaluation Kit
Evaluate: MAX6652/MAX6683
Figure 1. MAX6683 EV Kit User-Interface Panel
_______________________________________________________________________________________
3
MAX6683 Evaluation System/Evaluation Kit
Evaluate: MAX6652/MAX6683
Figure 2. MAX6683 EV Kit Configuration Display
4
_______________________________________________________________________________________
MAX6683 Evaluation System/Evaluation Kit
Detailed Description
User-Interface Panel
The user interface is easy to operate using the mouse,
or by using the tab key to navigate with the arrow keys.
The checkboxes, edit fields, and radio buttons corre-
spond to bits in the internal registers. By clicking on
them, the correct SMBus write operation is generated
to update the registers.
The program monitors for an alert interrupt and continu-
ally polls the device for new temperature, voltage, and
status data. To disable the continuous polling of data,
uncheck the
Automatic Read
checkbox. To change
the temperature or voltage threshold comparison regis-
ters, select the appropriate data field and type in the
new value. Pressing Enter, after typing in the new val-
ues, updates the internal registers.
The message
ALERT
appears whenever an interrupt
condition occurs. To clear the interrupt, first eliminate the
condition that caused it and then click on
Read Status.
Jumper and Switch Settings
Jumper 1 (JU1) sets the MAX6683 slave address. The
default address is 0010 101 (ADD = VCC); see Table 1
for a complete list of addresses. The slide switch, SW1,
provides a means to force a reset. This switch disables
power to the device.
Evaluate: MAX6652/MAX6683
Table 1. JU1 Shunt Settings for SMBus
Address
SHUNT
LOCATION
0x28
0x2A
0x2C
0x2E
ADD
CONNECTION
To GND
To VCC
To SDA
To SCL
MAX6683
ADDRESS
0010 100Y
0010 101Y
0010 110Y
0010 111Y
Note:
The first 7 bits shown are the address. Y (bit 0) is the
SMBus read/write bit. This bit is a 1 for a read operation and
zero for a write.
Simple SMBus Commands
There are two methods for communicating with the
MAX6683: through the normal user-interface panel or
through the SMBus commands available from pressing
the
MAXSMBus..
button. A display appears that allows
the SMBus protocols, such as Read Byte and Write
Byte, to be executed. To stop normal user-interface
execution so that it does not override the manually set
values, turn off the update timer that slaves the pro-
gram to the conversion rate by unchecking the
Automatic Read
checkbox.
The SMBus dialog boxes accept numeric data in bina-
ry, decimal, or hexadecimal. Hexadecimal numbers
should be prefixed by $ or 0x. Binary numbers must be
exactly eight digits.
Note:
In places where the slave address asks for an 8-
bit value, it must be the 7-bit slave address of the
MAX6683 as determined by the address pin (ADD) with
the last bit set to 1 for a read operation and 0 for a write.
Evaluating the MAX6652
The MAX6683 EV kit can also evaluate the MAX6652.
Remove the MAX6683 from the board and install the
MAX6652.
The MAX6652 and MAX6683 monitor different voltages.
See Table 2.
When evaluating the MAX6652 with the MAX6683 soft-
ware, the voltages displayed for the supply voltage (V
CC
),
the 1.8V nominal voltage, and the 5V nominal voltage are
incorrect. However, the ADC output code, shown in
parentheses next to the voltage, is correct. Use the equa-
tions shown below to calculate the actual voltages:
5V
×
ADC output code
192
12V
×
ADC output code
Voltage on pin 1
=
192
3.3V
×
ADC output code
Voltage on pin 3
=
192
V
CC
=
Data Logging
Check the
Data Logging
checkbox to activate data
logging. Data logging saves temperature, voltage, 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 2Hz; however, the data is logged to
the file only if the temperature, voltage, or status
change. This slows the growth of the data-logging file.
When
Automatic Read
is disabled, the data is logged
each time the
Read All
button is clicked. To stop data
logging, uncheck the
Data Logging
checkbox.
Table 2. Voltage Monitor Differences
Between MAX6652 and MAX6683
PIN
10 (V
CC
)
1
3
MAX6652 (V)
5
12
3.3
MAX6683 (V)
3.3
1.8
5
5
_______________________________________________________________________________________
____________________________________________________________________________________
5
医疗电子
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
