Maxim MAX6652 Evaluation system/evaluation kit Datasheet

19-2343; Rev 1; 3/07
MAX6683 Evaluation System/Evaluation Kit
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 printed 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 emulate an Intel SMBus. Windows® 98SE/2000/XP-compatible 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 complete 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)
VCC Pin (3.3V Nominal)
♦ Programmable Alarms and Configuration
♦ SMBus/I2C 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
TEMP
RANGE
INTERFACE
TYPE
MAX6683EVKIT
0°C to +70°C
Not included
MAX6683EVCMODU
0°C to +70°C
CMODUSB
PART
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 Kit
MAX6683 EV System
PART
QTY
MAX6683EVKIT
1
MAX6683 evaluation kit
DESCRIPTION
CMODUSB+
1
Serial interface board
DESIGNATION
C1, C2
QTY
2
+Denotes lead-free and RoHS compliance.
SMBus is a trademark of Intel Corp.
Windows is a registered trademark of Microsoft Corp.
DESCRIPTION
0.1µF, 16V X7R ceramic capacitors
Taiyo Yuden EMK107BJ104KA
Murata GRM188R71C104KA01
TDK C1608X7R1C104K
J1
1
2.2µF, 16V X7R ceramic capacitor
Taiyo Yuden EMK316BJ225ML
Murata GRM42-6X7R225K016
TDK C3216X7R1C225M
2 ✕ 10 right-angle female
JU1
1
2 ✕ 4 straight header
JU2
0
Not installed
R1, R2, R3
3
10kΩ ±5% resistors
R4
1
470kΩ ±5% resistor
SW1
1
Slide switch
U1
1
MAX6683AUB
U2
1
MAX1615EUK
—
1
Shunt for JU1
—
1
PCB: MAX6683 Evaluation Kit
C3
1
________________________________________________________________ Maxim Integrated Products
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.
1
Evaluate: MAX6652/MAX6683
General Description
Evaluate: MAX6652/MAX6683
MAX6683 Evaluation System/Evaluation Kit
Component Suppliers
PHONE
FAX
Murata Mfg. Co., Ltd.
SUPPLIER
770-436-1300
770-436-3030
www.murata.com
WEBSITE
Taiyo Yuden
800-348-2496
847-925-0899
www.t-yuden.com
TDK Corp.
847-803-6100
847-390-4405
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 underlined 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/evkitsoftware) to download the latest version of the EV
kit software, 6683Rxx.ZIP.
2) Install the MAX6683 EV kit software on your computer 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 included 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 chosen during installation) using the Browse button.
11) Turn on the power supplies.
12) Turn on the EV kit by moving SW1 to the ON position.
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 userinterface 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
Evaluate: MAX6652/MAX6683
MAX6683 Evaluation System/Evaluation Kit
Figure 2. MAX6683 EV Kit Configuration Display
4
_______________________________________________________________________________________
MAX6683 Evaluation System/Evaluation Kit
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 correspond 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 continually 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 registers, select the appropriate data field and type in the
new value. Pressing Enter, after typing in the new values, 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.
Table 1. JU1 Shunt Settings for SMBus
Address
SHUNT
LOCATION
ADD
CONNECTION
0x28
To GND
0010 100Y
0x2A
To VCC
0010 101Y
0x2C
To SDA
0010 110Y
0x2E
To SCL
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 program to the conversion rate by unchecking the
Automatic Read checkbox.
The SMBus dialog boxes accept numeric data in binary, 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 8bit 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.
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.
MAX6683
ADDRESS
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 software, the voltages displayed for the supply voltage (VCC),
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 equations 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
VCC =
Table 2. Voltage Monitor Differences
Between MAX6652 and MAX6683
PIN
MAX6652 (V)
MAX6683 (V)
10 (VCC)
5
3.3
1
12
1.8
3
3.3
5
5_______________________________________________________________________________________
____________________________________________________________________________________
5
Evaluate: MAX6652/MAX6683
Detailed Description
Evaluate: MAX6652/MAX6683
MAX6683 Evaluation System/Evaluation Kit
VCC
HEADER–20 PIN
J1-3
SDA
VCC
3
J1-2
2
1
J1-4
J1-7
SCL
J1-11
J1-1
ALERT
N.C.
J1-13
N.C.
N.C.
J1-8
R3
10kΩ
J1-10
ALERT
J1-17
N.C.
N.C.
6
J1-14
JU1 8
6
SDA
4
2
J1-16
J1-18
J1-15
GND
5V
J1-6
J1-12
J1-9
7
5
3
1
VCC
7
J1-5
J1-19
1
SHDN
IN
5
8
3
C3
2.2µF
4
5 VIN
3
SDA
5V
MAX1615
OUT
5/3
(FB)
SCL
4
R1
10kΩ
SCL
8
2.5 VIN
2
2.5 VIN
SCL
VCC
10
VCC
1.8 VIN
1
C1
0.1µF
Figure 3. MAX6683 EV Kit Schematic
6
5 VIN
GND
5V
JU2
CUT HERE
5
MAX6683
R2
10kΩ
SDA
N.C.
U1
U2
C2
0.1µF
2
GND
ADD
5V
J1-20
R4
470kΩ
ALERT
SCL
SDA
5V
SW1
_______________________________________________________________________________________
1.8 VIN
GND
MAX6683 Evaluation System/Evaluation Kit
Evaluate: MAX6652/MAX6683
Figure 4. MAX6683 EV Kit Component Placement Guide—
Component Side
Figure 5. MAX6683 EV Kit PCB Layout—Component Side
_______________________________________________________________________________________
7
Evaluate: MAX6652/MAX6683
MAX6683 Evaluation System/Evaluation Kit
Figure 6. MAX6683 EV Kit PCB Layout—Solder Side
Revision History
Pages changed at Rev 1: 1–5, 7, 8
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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