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general description the max7500 evaluation kit (ev kit) is a fully assembledand tested surface-mount pcb that evaluates the max7500 digital temperature sensor. the max7500 accurately measures temperature and provides an overtemperature alarm/interrupt/shutdown output. the ev kit is self-powered from the on-board usb inter- face and selects between the eight available i 2 c slave addresses of the max7500 ic. the max7500 ev kit canalso evaluate the max7501?ax7504 ics. request free ic samples from the factory when ordering the max7500 ev kit. the max7500 ev kit provides an on-board i 2 c/smbus interface and is connected to the comput- er through the universal serial bus (usb) port. the evkit includes windows 2000/xp and windows vista - compatible software that provides a graphical userinterface (gui) for control of the max7500? program- mable features. features ? self-powered from usb source ? optional 3v to 5.5v single power supply ? digital temperature sensor ? also evaluates max7501?ax7504 ? on-board i 2 c/smbus interface control through usb ? eight available i 2 c slave addresses ? windows 2000/xp and windows vista (32-bit)-compatible software ? lead(pb)-free and rohs compliant ? fully assembled and tested evaluates: max7500?ax7504 max7500 evaluation kit ________________________________________________________________ maxim integrated products 1 19-4548; rev 0; 4/09 component list for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information designation qty description c1, c41, c48?53, c57 9 0.1? ?0%, 50v x7r ceramiccapacitors (0603) murata grm188r71h104k tdk c1608x7r1h104k c2, c3, c11, c12, c36?39, c42, c44 10 1? ?0%, 16v x5r ceramiccapacitors (0603) murata grm188r71c105k tdk c1608x5r1c105k c40, c43, c45 3 10? ?0%, 16v x5r ceramiccapacitors (0805) kemet c0805c106k4pactu c46, c47 2 22pf ?%, 50v c0g ceramiccapacitors (0603) murata grm1885c1h220j or tdk c1608c0g1h220j c54, c55 2 10pf ?%, 50v c0g ceramiccapacitors (0603) murata grm1885c1h100j tdk c1608c0g1h100j designation qty description c56 1 0.033? ?0%, 16v x5r ceramiccapacitor (0603) murata grm188r71c333k taiyo yuden emk107bj333ka d1 1 10ma green led (0603) d2 1 10ma red led (0603) h1 0 not installed, 2 x 5-pin jtag header ju1, ju3, ju4, ju6, ju8, ju14 6 3-pin headers ju2 1 4-pin header ju5, ju11, ju12, ju13 0 not installed, 2-pin headers ju7, ju9, ju10 0 not installed, 2-pin headers?cbshort l2 1 ferrite bead (0603) tdk mmz1608r301a murata blm18sg700 tn1 part tpe MAX7500EVKIT+ ev kit smbus is a trademark of intel corp. windows and windows vista are registered trademarks of microsoft corp. + denotes lead(pb)-free and rohs compliant. downloaded from: http:///
evaluates: max7500?ax7504 max7500 evaluation kit 2 _______________________________________________________________________________________ component list (continued) designation qty description p1 1 usb type-b right-angle pc-mountreceptacle assmann electric au-y1007-r r1, r2, r3, r10 4 4.7k 5% resistors (0603) r4?9, r11, r12, r32, r33, r34 0 not installed, resistors (0603) r35 1 169k ?% resistor (0603) r36 1 100k ?% resistor (0603) r37, r38 2 27 ?% resistors (0603) r39 1 1.5k ?% resistor (0603) r40 1 2.2k ?% resistor (0603) r41 1 470 ?% resistor (0603) r42 1 10k ?% resistor (0603) r43?47 0 not installed, resistors?horted bypcb trace (0402) r48, r49 2 220 ?% resistors (0603) u1 1 d i g i tal tem p er atur e sensor ( 8 ? ax ? ) m axi m m ax 7500m u a+ designation qty description u2 1 microcontroller (68 qfn-ep*)maxim maxq2000-rax+ u3 1 2.5v ldo regulator (5 so70)maxim max8511exk25+ u4 1 adjustable output ldo regulator(5 so70) maxim max8512exk+ u5 1 uart-to-usb converter(32 tqfp, 7mm x 7mm) ftdi ft232bl u6 1 93c46 type (64k x 16) 3-wireeeprom (8 so) atmel at93c46en-sh-b u7?10 4 logic-level translators (10 ?ax)maxim max1840eub+ y1 1 16mhz crystal y2 1 6mhz crystal 7 shunts 1 pcb: max7500 evaluation kit+ ?ax is a registered trademark of maxim integrated products, inc. * ep = exposed pad. component suppliers supplier phone website kemet corp. 864-963-6300 www.kemet.com murata electronics north america, inc. 770-436-1300 www.murata-northamerica.com taio yuden 800-348-2496 www.t-uden.com tdk corp. 847-803-6100 www.component.tdk.com max7500 ev kit files file description install.exe installs the ev kit files on our computer max7500.exe application program ftd2xx.inf usb device driver file uninst.ini uninstalls the ev kit software troubleshooting_usb.pdf usb driver installation help file note: indicate that you are using the max7500 when contacting these component suppliers. downloaded from: http:///
evaluates: max7500?ax7504 max7500 evaluation kit _______________________________________________________________________________________ 3 quick start recommended equipment user-supplied windows 2000/xp or windows vista- compatible pc with a spare usb port note: in the following sections, software-related items are identified by bolding. text in bold refers to itemsdirectly from the ev kit software. text in bold and under - lined refers to items from the windows operating system. procedure the max7500 ev kit is fully assembled and tested.follow the steps below to verify board operation. caution: do not turn on the power supply until all connections are completed. 1) verify that shunts are installed across pins 1-2 of jumpers ju1 and ju2. 2) verify that shunts are installed across pins 2-3 of jumpers ju3, ju4, ju6, and ju8. 3) visit www.maxim-ic.com/evkitsoftware to down- load the latest version of the max7500 ev kit soft-ware, max7500rxx.zip. save the ev kit software to a temporary folder and uncompress the zip file. 4) install the ev kit software on your computer by run- ning the install.exe program inside the temporaryfolder. the program files are copied and icons are created in the windows start | programs menu. 5) connect the usb cable from the pc to the ev kit board. a building driver database window pops up in addition to a new hardware found message when installing the usb driver for the first time. if youdo not see a window that is similar to the one described above after 30s, remove the usb cable from the board and reconnect it. administrator privi- leges are required to install the usb device driver on windows 2000/xp and windows vista. 6) 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 bec:\program files\max7500 (default installation directory) using the browse button. during device driver installation, windows may show a warningmessage 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 instal- lation. refer to the troubleshooting_usb.pdf document included with the software for additional information. 7) start the max7500 ev kit software by opening its icon in the start | programs menu. 8) normal device operation is verified when max7500 device connected is displayed in the bottom-left status bar on the max7500 ev kit main window(figure 1). figure 1. max7500 ev kit software main window downloaded from: http:///
evaluates: max7500?ax7504 detailed description of hardware the max7500 evaluation kit (ev kit) is a fully assem-bled and tested surface-mount pcb that evaluates the max7500 digital temperature sensor. the max7500 accurately measures temperature, provides an overtemperature alarm/interrupt/shutdown output, fea- tures three address select lines, and integrates a time- out feature that offers protection against i 2 c bus lockups.the ev kit is self-powered from the on-board usb inter- face and requires no external power. the max7500 ev kit can also evaluate the max7501?ax7504 ics. request free ic samples from the factory when order- ing the max7500 ev kit. the max7500 ev kit provides an on-board i 2 c/smbus interface and is connected to the computer through theusb port. the ev kit includes windows 2000/xp and windows vista-compatible software that provides a graphical user interface (gui) for control of the max7500? programmable features and selects between the eight available slave addresses of the max7500 ic. power-supply options jumper ju1 selects between the max7500 ev kit?power-up options; either on-board through the usb interface or through an external user-supplied dc power supply. the voltage from the usb interface is stepped down to +3.3v through the max8512 ldo. to configure these options, set ju1 as desired (see table 1). max7500 evaluation kit 4 _______________________________________________________________________________________ jumper shunt position description 1-2* connects the max7500 to the on-board +3.3v supply ju1 2-3 connects the max7500 to the user-supplied (3v to 3.6v) supply 1-2* connects pin a2 of the max7500 to gnd, logic-low 1-3 max7501?ax7504 only. connects reset input to either external signal or the on-board i 2 c/smbus interface. ju2 1-4 connects pin a2 of the max7500 to vs, logic-high 1-2 connects pin a1 of the max7500 to vs, logic-high ju3 2-3* connects pin a1 of the max7500 to gnd, logic-low 1-2 connects pin a0 of the max7500 to vs, logic-high ju4 2-3* connects pin a0 of the max7500 to gnd, logic-low 1-2 connects the max7500 to the user-supplied scl ju6 2-3* connects the max7500 to the on-board scl 1-2 connects the max7500 to the user-supplied sda ju8 2-3* connects the max7500 to the on-board sda 1-2 connects the max7501?ax7504 to the user-supplied reset ju14 2-3* connects the max7501?ax7504 to the on-board software-enabled reset table 1. max7500 ev kit jumper descriptions (ju1?u4, ju6, ju8, ju14) * default position. downloaded from: http:///
setting the i 2 c slave address (a2, a1, a0) the max7500 has eight available slave addresses thatcan be selected by setting the a2, a1, and a0 pins either high or low. the ev kit provides jumpers ju2, ju3, and ju4 to set a2, a1, and a0, respectively. ju2 also provides an additional option useful for evaluating the max7501?ax7504 that will be discussed in a later section. the default configuration of the ev kit sets a2, a1, and a0 low, resulting in a slave address of 0x90. user-supplied i 2 c/smbus interface to use the max7500 ev kit with a user-suppliedi 2 c/smbus interface, first move the shunts of ju6 and ju8 to the 1-2 position. then, connect the sda and sclsignals to the corresponding sda and scl pads on the max7500 ev kit board. r6 and r7 footprints are provid- ed for the option to add pullup resistors if needed. evaluating the max7501?ax7504 the max7500 ev kit can also be configured to acceptthe max7501?ax7504. to evaluate the max7501 max7504, replace the ic (u1) and set ju2 to pins 1-3 ( reset input). to utilize the reset input on the max7501?ax7504, ju14 must also be set accordingly: pins 1-2 for anexternal reset input or pins 2-3 for software control of the reset input. note: to apply an external reset signal, apply a low pulse with a duration of at least 1?at the reset pad. refer to the max7501?ax7504 ic data sheet for additional information. detailed description of software the max7500 ev kit software accurately reads temper-ature data with a 0.5 c resolution, sets the upper and lower temperature threshold limits, and configures thebehavior of the open-drain overtemperature shutdown (os) output. the max7500 supports eight different i 2 c slave addresses; configure ju2, ju3, and ju4 to selectbetween different addresses. check the shutdown checkbox (figure 1) to shut down the max7500 internalblocks. by pressing the defaults button, the device is restored to its power-on-reset (por) state. refer to themax7500?ax7504 ic data sheet for further details. reading temperature temperature data is displayed on the software mainwindow (figure 1). to read temperature, press the read button and the sensor temperature is displayed on the software interface with a 0.5 c resolution. the auto-read checkbox is provided to continuously read and display the temperature and limit registers?datawhen checked. the os fault indicator is displayed under the tempera- ture data on the software? main gui. the indicatorasserts (turns red) when the os is asserted. the indica- tor deasserts (turns green) when the os is deasserted. refer to the t os and t hyst registers section in the max7500?ax7504 ic data sheet for more information. setting t os and t hyst registers the t os and t hyst registers can be set by writing the appropriate values in the tos and thyst edit boxes and pressing their respective write button. the current contents of the t os and t hyst registers can be read by pressing on the read button. configuration register the configuration group box sets the fault queue, os polarity, shutdown control, and whether the os outputfunctions in comparator or interrupt mode. the fault queue drop-down list determines the number of faults necessary to trigger an os condition. the os polarity drop-down list forces the os polarity to either active-low or active-high. the shutdown checkbox, when checked, shuts down the internal blocks and drops thesupply current to 3?. the mode drop-down list selects between running the os output in comparator or interrupt modes. in com-parator mode, os is asserted when the temperature rises above the t os value and is deasserted when the temperature drops below the t hyst value. in interrupt mode, os is asserted when the temperature risesabove the t os value or falls below the t hyst value and os is deasserted only after performing a readoperation. evaluates: max7500?ax7504 max7500 evaluation kit _______________________________________________________________________________________ 5 downloaded from: http:///
evaluates: max7500?ax7504 max7501?ax7504 software reset when using the optional max7501?ax7504, the evkit software gives the capability to send a reset pulse to the reset pin on the ic. to reset the max7501 max7504, select the options | reset i2c (7501-7504 only) menu item from the menu bar. ju14 must be set to pins 2-3 and jumper ju2 must be set to pins 1-3. simple smbus commands there are two methods for communicating with themax7500, through the max7500 ev kit software main window (figure 1), or through the interface window available by selecting the options | interface diagnostic window menu item from the menu bar. the maxim command module interface window (figure 2)includes a 2-wire interface tab that allows for execu- tion of the frequently used commands. max7500 evaluation kit 6 _______________________________________________________________________________________ figure 2. command module interface window downloaded from: http:///
evaluates: max7500?ax7504 max7500 evaluation kit _______________________________________________________________________________________ 7 figure 3a. max7500 ev kit schematic (sheet 1 of 3) downloaded from: http:///
evaluates: max7500?ax7504 max7500 evaluation kit 8 _______________________________________________________________________________________ figure 3b. max7500 ev kit schematic (sheet 2 of 3) downloaded from: http:///
evaluates: max7500?ax7504 max7500 evaluation kit _______________________________________________________________________________________ 9 figure 3c. max7500 ev kit schematic (sheet 3 of 3) downloaded from: http:///
evaluates: max7500?ax7504 max7500 evaluation kit 10 ______________________________________________________________________________________ figure 4. max7500 ev kit component placement guide?omponent side downloaded from: http:///
evaluates: max7500?ax7504 max7500 evaluation kit ______________________________________________________________________________________ 11 figure 5. max7500 ev kit pcb layout?omponent side downloaded from: http:///
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. 12 __________________ maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2009 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. evaluates: max7500?ax7504 max7500 evaluation kit figure 6. max7500 ev kit pcb layout?older side downloaded from: http:///

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