MAX6581 Evaluation Kit
Evaluates: MAX6581
General Description
The MAX6581 evaluation kit (EV kit) is an assembled
and tested PCB used to evaluate the MAX6581 8-chan-
nel temperature sensor. The device monitors its own
die temperature and the temperatures of up to seven
external diode-connected transistors. It converts the
temperature to 8-bit or 11-bit 2-wire serial data that can
be accessed over a 2-wire serial bus.
The EV kit also includes Windows
®
2000-, Windows
XP
®
-, and Windows Vista
®
-compatible software, which
provides a simple user interface for exercising the fea-
tures of the device. The program is menu driven and
offers a graphical user interface (GUI) complete with
control buttons and status display.
S
Seven Remote Temperature Sensors
S
Local Temperature Sensor
S
Programmable Undertemperature and
Features
Overtemperature Alerts
S
Two Open-Drain Alarm Outputs (ALERT and
OVERT)
S
On-Board Microcontroller to Generate
SMBus™/I²C Commands
S
Easy-to-Use, Menu-Driven Software
S
Fully Assembled and Tested
Ordering Information
PART
MAX6581EVKIT+
TYPE
EV Kit
+Denotes
lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION
C1, C4–C8,
C12, C17, C19
QTY
DESCRIPTION
0.1FF
Q10%,
16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104K
Murata GRM188R71C104K
10FF
Q20%,
16V X5R ceramic
capacitors (1206)
Murata GRM31CR61C106M or
TDK C3216X5R1C106M
4.7FF
Q10%,
6.3V X5R ceramic
capacitor (0603)
TDK C1608X5R0J475K
Murata GRM188R60J475K
0.033FF
Q10%,
16V X5R ceramic
capacitor (0603)
Murata GRM188R71E333K
TDK C1608X7R1E333K
22pF
Q5%,
50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J
TDK C1608C0G1H220J
DESIGNATION
QTY
DESCRIPTION
1FF
Q10%,
16V X5R ceramic
capacitor (0603)
TDK C1608X5R1C105K
Murata GRM188R61C105K
10pF
Q5%,
50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J
TDK C1608C0G1H100J
100pF
Q5%,
50V C0G ceramic
capacitors (0603)
Murata GRM1885C2A101J
TDK C1608C0G1H101J
Red LEDs (0805)
Green LED (0805)
70I, 4A ferrite bead (0603)
TDK MMZ1608R301A
Murata BLM18SG700 TN1
Not installed, 2 x 5-pin JTAG
header
2-pin headers
3-pin header
9
C14
1
C2, C13, C15
3
C16, C18
2
C3
1
C20–C26
7
D1, D2
D3
FB1
2
1
1
C9
1
C10, C11
2
H1
JU1–JU8
JU9
0
8
1
Windows, Windows XP, and Windows Vista are registered
trademarks of Microsoft Corp.
SMBus is a trademark of Intel Corp.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5498; Rev 0; 9/10
MAX6581 Evaluation Kit
Evaluates: MAX6581
Component List (continued)
DESIGNATION
P1
QTY
1
DESCRIPTION
USB type-B right-angle PC-mount
receptacle
2N3906-type pnp transistors
(SOT23)
Central Semi CMPT3906
Diodes Inc. MMBT3906
27I
Q5%
resistors (0603)
1.5kI
Q5%
resistors (0603)
470I
Q5%
resistors (0603)
2.2kI
Q5%
resistor (0603)
10kI
Q5%
resistors (0603)
0I resistor (0603)
Not installed, resistors (0603)
R9, R10, R11 are open;
R12–R16 are short PC trace
8-channel temp sensor
(24 TQFN)
Maxim MAX6581TG9A+
Y2
—
—
*EP
= Exposed pad.
1
9
1
Y1
1
DESIGNATION
U2
U3
U4
U5
U6
QTY
1
1
1
1
1
DESCRIPTION
LDO regulator (5 SC70)
Maxim MAX8511EXK33+
Microcontroller (68 QFN-EP*)
Maxim MAXQ2000-RAX+
LDO regulator (5 SC70)
Maxim MAX8511EXK25+
USB-to-UART converter
(32 TQFP)
93C46-type 3-wire EEPROM
(8 SO)
16MHz crystal (HCM49)
Hong Kong X’tals
SSM1600000E18FAF
6MHz crystal (HCM49)
Hong Kong X’tals
SSL600000E18FAF
Shunts (JU1–JU9)
PCB: MAX6581 EVALUATION
KIT+
Q1–Q7
7
R1, R2
R3, R17, R18
R4, R7, R19,
R20
R5
R6, R21
R8
R9, R10,
R11–R16
2
3
4
1
2
1
0
U1
1
Component Suppliers
SUPPLIER
Central Semiconductor Corp.
Diodes Incorporated
Hong Kong X’tals Ltd.
Murata Electronics North America, Inc.
TDK Corp.
PHONE
631-435-1110
805-446-4800
852-35112388
770-436-1300
847-803-6100
www.diodes.com
www.hongkongcrystal.com
www.murata-northamerica.com
www.component.tdk.com
WEBSITE
www.centralsemi.com
Note:
Indicate that you are using the MAX6581 when contacting these component suppliers.
MAX6581 EV Kit Files
FILE
INSTALL.EXE
MAX6581.EXE
FTD2XX.INF
UNINST.INI
USB_Driver_Help.PDF
Application program
USB driver file
Uninstalls the EV kit software
USB driver installation help file
DESCRIPTION
Installs the EV kit files on your computer
2
Maxim Integrated
MAX6581 Evaluation Kit
Evaluates: MAX6581
Quick Start
•
•
MAX6581 EV kit (USB cable included)
option. Specify the location of the device driver to be
C:\Program Files\MAX6581
(default installation
directory) using the
Browse
button. During device
driver installation, Windows may show a warning
message indicating that the device driver Maxim
uses does not contain a digital signature. This is
not an error condition and it is safe to proceed
with installation. Refer to the USB_Driver_Help.PDF
document included with the software for additional
information.
6)
Start the EV kit software by opening its icon in the
Start | Programs
menu. The EV kit software main
window appears, as shown in Figure 1. Observe as
the program automatically detects the address of
the device and starts the main program.
Recommended Equipment
User-supplied Windows 2000, Windows XP, or
Windows Vista PC with a spare USB port
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 operating system.
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation.
Caution: Do not turn
on power supply until all connections are completed.
1)
Procedure
Visit
www.maximintegrated.com/evkitsoftware
to
download the latest version of the EV kit software,
6581Rxx.ZIP. Save the EV kit software to a tempo-
rary folder and uncompress the ZIP file.
Install the EV kit software on your computer by run-
ning the INSTALL.EXE program inside the tempo-
rary folder. The program files are copied and icons
are created in the Windows
Start | Programs
menu.
Verify all jumpers (JU1–JU9) are in their default
positions, as shown in Table 1.
Connect the USB cable from the PC to the EV kit
board. A
New Hardware Found
window pops up
when installing the USB driver for the first time. If a
window that is similar to the one described above
is not seen after 30s, remove the USB cable from
the board and reconnect it. Administrator privileges
are required to install the USB device driver on
Windows.
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
Detailed Description of Software
The MAX6581 EV kit user interface is easy to operate.
Each button corresponds to bits in the command and
configuration byte. By pressing them, the correct I
2
C-
compatible write operation is generated to update the
internal registers of the MAX6581.
The program polls the device for the new temperature
and status data a maximum of two times per second
(2Hz). To disable the polling of data, uncheck the
Auto
Read
checkbox located at the top of the program.
Check the
Data Logging
checkbox located at the top
of the program to activate data logging. Data logging
saves temperature and status data to a text file that
includes a time/date stamp next to each data point. If
the
Auto Read
checkbox is checked, data is sampled
at 2Hz; however, the data is logged to the file only if the
temperature or status has changed. This slows the
User Interface
2)
3)
4)
Automatic Read
Data Logging
5)
Table 1. Jumper Description (JU1–JU9)
JUMPER
JU1–JU7
JU8
JU9
*Default
position.
Maxim Integrated
3
SHUNT
POSITION
Installed*
Not installed
Installed
Not installed*
1-2*
2-3
DESCRIPTION
The EV kit uses the 2N3906 transistors as the external diode-connected transistors.
The EV kit uses user-supplied external diode-connected transistors.
STBY
logic-low places the device in standby mode.
STBY
logic-high places the device in normal mode.
Connects the device to the on-board 3.3V supply.
Connects the device to the user-supplied (3V to 3.6V) supply.
MAX6581 Evaluation Kit
Evaluates: MAX6581
growth of the data-logging file. When the
Auto Read
checkbox is unchecked, the data is logged each time
Read All
is selected from the
Options
menu bar. To stop
data logging, uncheck the
Data Logging
checkbox.
The remote-diode-measurement channels can provide
11 bits of data (1 LSB = +0.125°C). The 8 most signifi-
cant bits (MSBs) can be read from the local temperature
and remote temperature registers. The remaining 3 bits
for remote can be read from the extended temperature
register. Extended resolution is enabled by checking the
Enable Extended Resolution (0x57)
checkbox within
the
Temperature
tab sheet (Figure 1).
Read a temperature by pressing the
Read
button. The
temperature (in Celsius) reading is shown to the right of
the GUI.
All temperature channels have programmable alert
(ALERT) and overtemperature (OVERT) thresholds. Both
alert and overtemperature limits can be set in the
ALERT
Temperature Limit (0x17)
and
OVERT Temperature
Limit (0x20)
group boxes within the
Temperature
tab
sheet (Figure 1).
Temperature
ALERT
and
OVERT
Temperature Limits
Read a limit by pressing the
Read
button. The value
(in Celsius) is shown in the edit field. Change a limit by
entering the value (in Celsius) into the appropriate edit
field and pressing the
Write
button.
Figure 1. MAX6581 EV Kit Software Main Window (Temperature Tab)
4
Maxim Integrated
MAX6581 Evaluation Kit
Evaluates: MAX6581
Configuration,
ALERT
Mask, and
OVERT
Mask Registers
The
Alert High Status (0x44), OVERT Status (0x45),
Diode Fault Status (0x46),
and
Alert Low Status
(0x47)
group boxes monitor the four status registers and
display the critical and fault conditions that occur. See
Tables 5–8 for a list of the status conditions.
Read the status of each register by pressing the
Read
Status
button within each group box.
The
Alert High Status (0x44)
group box indicates
whether a measured local or remote temperature has
exceeded the associated threshold limit set in an
ALERT
High Limit register.
The
OVERT Status (0x45)
group box indicates whether
a measured temperature has exceeded the associated
threshold limit set in an
OVERT
High Limit register.
Status Register Functions
The configuration register controls the standby-mode bit,
the power-on-reset bit, the SMBus timeout enable bit,
and the extended-range enable bit. The
ALERT
mask
register enables or disables the
ALERT
interrupt out-
put. The
OVERT
mask register enables or disables the
OVERT
interrupt output.
Figure 2 shows the checkboxes for the configuration reg-
ister. Each checkbox corresponds to a bit in the register.
Tables 2, 3, and 4 describe the function for each check-
box in the
Configuration
tab's group boxes.
Read the register by pressing the
Read
button. Change
the register by selecting or deselecting the desired func-
tions and pressing the
Write
button.
Figure 2. MAX6581 EV Kit Software Main Window (Configuration Tab)
Maxim Integrated
5
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