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general description the max31730 evaluation kit (ev kit) provides the hardware and software graphical user inter - face (gui) necessary to evaluate the max31730 3-channel remote temperature sensor in a max m or tdfn package. the ev kit includes a max31730 installed, as well as three external diode-connected tran - sistors and a usb-to-smbus/i 2 c interface. ev kit contents assembled circuit board including max31730 mini usb cable features easy evaluation of the max31730 three external diode-connected transistors ev kit hardware is usb powered (usb cable included) usb hid interface windows xp ? - and windows ? 7-compatible software rohs compliant proven pcb layout fully assembled and tested 19-6768; rev 1; 6/15 ordering information appears at end of data sheet. max is a registered trademark of maxim integrated products, inc. windows and windows xp are registered trademarks and registered service marks of microsoft corporation. max31730u ev kit photo evaluates: max31730 max31730 evaluation kit downloaded from: http:///
quick start required equipment max31730 ev kit hardware windows xp or windows 7 pc spare usb port mini usb cable (included) note: in the following sections, software-related items are identified by bolding. text in bold refers to items directly from the install or ev kit software. text in bold and under- lined refers to items from the windows operating system. procedure the ev kit is fully assembled and tested. follow the steps below to verify board operation: 1) ensure that jumpers/shunts (j22, j1Cj3) are installed. 2) set the ev kit hardware on a nonconductive surface to ensure that nothing on the pcb gets shorted together. 3) prior to starting the gui, connect the ev kit hardware to a pc using the supplied mini-usb cable, or equivalent. the power led (d20) should be green and the com led (d21) should be red and slowly lash orange. 4) windows should automatically begin installing the necessary device driver. the usb interface of the ev kit hardware is conigured as an hid device and therefore does not require a unique/custom device driver. once the driver installation is complete, a windows message appears near the system icon menu indicating that the hardware is ready to use. do not attempt to run the gui prior to this message. if you do, you must close the application and restart it once the driver installation is complete. on some versions of windows, administrator privileges may be required to install the usb device. 5) once the device driver installation is complete. visit www.maximintegrated.com/evkitsoftware to download the latest version of the ev kit software, max31730evkitsetup.zip. save the ev kit software to a temporary folder. 6) unzip the .zip ile and double-click the .exe ile to run the installer. a message box stating: the publisher could not be veriied. are you sure you want to run this software? may appear. if so, click yes . 7) follow the instructions on the installer and once complete, click finish . the default location of the gui is in the program iles directory. 8) when the gui appears, the text in the bottom right-hand corner should display ev kit hardware connected . the com led (d21) on the ev kit board should turn green. detailed description of software software startup if the max31730 ev kit is connected when the software is opened, the software first initializes the hardware to communicate. the software then searches for all slave addresses on the i 2 c bus and connects to the first valid slave address. the gui displays ev kit hardware connected in the bottom right-hand corner. if the ev kit is not connected on software startup, the gui populates with default ev kit values. once the ev kit is connected, the gui executes the sequence above. menu and status bar the file menu item contains save and load options. to save the current gui configuration, select save config or save config as . this saves all the configuration registers to an xml file. if a device is connected, this reads and saves data directly from the device; otherwise, it saves the configuration that is currently displayed on the gui. load config writes all the configuration data stored in the xml file to the device and then performs a read to update the gui with the new values. if a device is not connected, load config writes to a virtual device and displays the data on the gui. the device menu item allows the user to connect to a desired device. find slave addresses searches for all slave addresses connected to the i 2 c bus. to select a device, click select slave address and all the slave addresses found are shown and are select - able. the options menu contains the polling rate option and the log polling data to file option. the polling rate sets the delay between reads. to save the polling data to a csv file, check the log polling data to file option and then click start polling to select a name for the file and begin reading. ev kit files file description max31730evkitsetup.exe application program note : the .exe is downloaded as a .zip file. maxim integrated 2 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
status logthe status log below the tabs displays all the actions the gui performs. whenever an smbus command is read or written, the action is confirmed by the log. the log can be cleared by pressing the clear button. status tab the status tab sheet ( figure 1 ) displays all the current temperatures and the fault status. all values in the temperature status group box are read when the tab is selected. to read the values again, press the read temp status button.the one shot read button is only enabled when the device is in standby mode by checking the stop option on the config tab ( figure 2 ). the over temp and under temp status is read from thermal status, high temperature (32h) and thermal status, low temperature (33h) registers. the diode fault status is read from diode fault status (36h) register. the temperature column is read from the temperature registers (00h to 07h) and the highest temperature is read from registers 10h to 11h. to graph the temperatures, start polling by clicking the start polling button in the menu bar. to stop polling, press the stop polling button. polling automatically stops if items in the file or connection menu are selected, or if the por button is pressed. to save the polling data to a csv file, check log polling data to file in the options menu before polling is started. figure 1. max31730 ev kit software gui (status tab) maxim integrated 3 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
coniguation tab the config tab sheet ( figure 2 ) contains all the configura - tion registers. all values are read when the tab is selected. in the tables, hold the mouse over the column header to see which register(s) the cells in the column read/write to. the beta value column is the only column where all the cells are read-only. if the extended range checkbox in the configuration register (13h) group box is checked, all the temperature values on the config and status tab are updated to reflect the extended range format. the hex values stored in these registers are not changed. registers tab the registers tab sheet ( figure 3 ) displays all the registers and their current data. to read the registers, press the read all button. to write to a register, enter the hex value in the cell and click another cell or press enter on the keyboard. figure 2. max31730 ev kit software gui (config tab) maxim integrated 4 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
figure 3. max31730 ev kit software gui (registers tab) maxim integrated 5 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
smbus controls tab the smbus controls tab sheet ( figure 4 ) allows the user to read and write to registers using hex values. the one and two byte operations (all hex values) group box contains controls to read/write 1 or 2 bytes at a time. to read or write a register, enter the register address desired in the addr or start addr edit box and press the read or write button. the bitwise read/write group box allows the user to read/write the data in binary format. to read or write a register, enter the register address in the address edit box and press the read or write button. the data bits can be flipped by pressing the bit buttons. the all 0s , all 1s , and invert buttons are useful shortcuts to change all the bits at one time. the page mode (all hex values) group box reads/writes one page (8 bytes) at a time. to read or write a page of memory, enter the starting register address in the starting address edit box and press the read or write button. figure 4. max31730 ev kit software gui (smbus controls tab) maxim integrated 6 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
detailed description of hardware user-supplied i 2 c interface to communicate with the max31730 using a user- supplied i 2 c interface, first remove all j22 jumpers to disconnect the on-board usb i 2 c interface. connect all pins on header h1 to the off-board i 2 c interface. changing the slave address the default slave address for the ic is 38h. this address can be changed to an address listed in table 1 by removing jumper j4 and populating resistor r3. user-supplied remote diode to connect a user-supplied external remote diode, first remove the channel jumper (j1, j2, or j3) to disconnect the on-board diode. then connect dxp1, dxp2, or dxp3 and dxn to the external diode. for the tdfn package, each diode has a separate dxn for each channel. troubleshooting the ev kit should work on the first try directly out of the box. in the rare occasion that a problem is suspected, see table 4 to help troubleshoot the issue. table 1. slave addresses slave address r3( ) 9eh open (> 12k) 9ch 9.31k 9ah 6.81k 98h 4.75k 3eh 3.01k 3ch 1.69k 3ah 750 38h 0 (short to gnd with j4 installed) table 2. description of leds led color description d1 red therm : a thermal fault has occured. d20 (power) red usb power fault: a fault oc- curred due to overvoltage limit, current limit, or thermal limit. green usb power: usb power supply is on. d21 (com) red communication: after the soft- ware has initialized the hard- ware, the led lashes red when an i 2 c command is received. green initialized: hardware has been initialized by software. table 3. description of jumpers (j1 C j4, j22) jumper jumper name description j1 enable q1 connects the remote diode-connected transistor q1 to dxp1. j2 enable q2 connects the remote diode-connected transistor q2 to dxp2. j3 enable q3 connects the remote diode-connected transistor q3 to dxp3. j4 add connects pin add to gnd. j22 vdut-3.3v supplies 3.3v from the usb i 2 c dongle to the ev kit board. scl-scl connects scl from the usb i 2 c dongle to the ic's scl. sda-sda connects sda from the usb i 2 c dongle to the ic's sda. maxim integrated 7 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
table 4. troubleshooting symptom check solution gui says hardware not found is the led labeled d20 red? if yes, then the electronic fuse is in a fault state. inspect for electrical shorts on the pcb and make sure that the pcb is not sitting on a conductive surface. does the led labeled d21 turn green when the gui is running? if not, then exit the gui and try running it again. if d20 still does not turn green, then exit the gui and try connecting the usb cable to a different usb port on the pc and wait for a windows message that states the hardware is ready to use. run the gui again. are any of the leds illuminated? if not, then the pcb may not be getting power from usb. try a different usb cable or a different usb port. no slave address found and read/writes fail jumper j22 make sure three jumpers on j22 are installed. gui always displays a diode fault on the status tab j1, j2, or j3 for the on-board diodes, jumpers j1Cj3 must be installed to connect the diode to dxp. maxim integrated 8 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
component list designation qty description c1, c212 2 0.1f, x7r ceramic capacitors (0805) c1aCc1c 3 100pf, x7r ceramic capacitors (0805) c2aCc2c, c215 0 do not populate, ceramic capacitors (0805) c201, c202, c204 3 10f, x5r ceramic capacitors (0805) c203, c214 2 0.01f, x7r ceramic capacitors (0805) c211 1 1f, x7r ceramic capacitor (0805) c213 1 0.22f, x7r ceramic capacitor (0805) d1 1 red led (1206) d20, d21 2 red/green dual leds d22 1 30v, 3a schottky diode (mini2) h1 1 4-pin header, 2.54mm pitch j1Cj4 4 2-pin headers, 2.54mm pitch j20 1 5-pin female mini-usb j21 0 do not populate, header j22 1 6-pin (2 x 3) header, 2.54mm pitch q1Cq3 3 bipolar bjt pnp (sot23) fairchild mmbt3906 r3 0 do not populate, resistor (0805) r4, r210, r215, r216 4 4.7k 1% resistors (0805) r5, r211, r212 3 330 1% resistors (0805) component supplier supplier phone website fairchild semiconductor 408-822-2000 www.fairchildsemi.com designation qty description r201, r202, r214 3 0 1% resistors (0805) r203, r205 2 560 1% resistors (0805) r204 1 100k 1% resistor (0805) r206 1 45.3k 1% resistor (0805) r207 1 10k 1% resistor (0805) r213 1 2.2k 1% resistor (0805) tp1, tp9, tp10 3 red test points tp1aCtp1c, tp2, tp2aCtp2c, tp3Ctp5 10 white test points tp6Ctp8 3 black test points u1 1 3-channel remote temperature sensor maxim max31730aub+ (10 max) or max31730atc+ (12 tdfn) u20 1 microcontroller (28 so)microchip pic18lf2550-i/so u21 1 50ma to 600ma current-limit switch (6 sot23) maxim max4995aaut+ u22 7 500ma ldo regulator (8 tdfn-ep*) maxim max8902bata+ x1 1 48mhz, 3.3v oscillator (smd) 7 jumpers/shunts 1 mini-usb cable 1 pcb: max31730 ev kit * ep = exposed pad. note: indicate that you are using the max31730 when contacting this component supplier. maxim integrated 9 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
figure 5a. max31730u ev kit schematic (max) (sheet 1 of 2) 1 1 2 2 3 3 4 4 d d c c b b a a r3 dnp r5330 d1 l ed c10.1uf r44.7k tp 1 vdut tp 6 gnd tp 7 gnd tp 8 gnd tp 5 therm tp 4 add tp 3 sda tp 2 scl gnd gnd gnd vdut c2c dnp c1c100pf 1 2 3 q3 mmbt3906 1 2 j3 enable q3 tp 1c dxp 3 tp 2c dxn c2b dnp c1b100pf 1 2 3 q2 mmbt3906 1 2 j2 enable q2 tp 1b dxp 2 tp 2b dxn c2a dnp c1a100pf 1 2 3 q1 mmbt3906 1 2 j1 enable q1 tp 1a dxp 1 tp 2a dxn sclsda external tem p sensor 1 external tem p sensor 2 external tem p sensor 3 ______ 1 2 j4add gnd vdd 1 dxp 1 2 dxn 3 dxp 2 4 dxp 3 5 gnd 6 therm 7 add 8 sda 9 scl 10 u1 max31730 - umax 2 3 4 1 h1 i 2c dongl e sclsda gnd vdut vdut maxim integrated 10 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
figure 5b. max31730t ev kit schematic (tdfn) (sheet 1 of 2) maxim integrated 11 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
figure 5c. max31730 ev kit schematic (max or tdfn) (sheet 2 of 2) 1 1 2 2 3 3 4 4 d d c c b b a a mcl r 1 p 3,hb 2 com_l ed,boot 3 p1 4 p2 5 rcv 6 p 6, cs 7 gnd 8 osc1 9 osc2 10 p4 11 uoe 12 p s_var 13 vusb 14 d- ,vm 15 d+,vp 16 enum 17 p 9,sdo 18 gnd 19 vdd 20 p 11,sdi ,sda 21 p 10,sck ,scl 22 vmo 23 vp o 24 usb_det 25 p5 26 p 7,1w_dq 27 p 8,1w_p u 28 u20 pi cfor ds3900 vbus 1 d- 2 d+ 3 i .d. 4 gnd 5 j20usb_5p in r203 560 r201 0 r202 0 r211330 r212330 r2132.2k r215 4.7k r216 4.7k r214 0 c204 10uf c2120.1uf c211 1uf c202 10uf c201 10uf c213 0.22uf c214 0.01uf d-d+ vbus 5v 3.3v 1 2 d22 3.3v 3.3v d+d- 3.3v tp 9 5v tp 10 3.3v scl ' sda' r2104.7k c215 dnp 1 2 j21 dnp vp p osc1 hbcom green d21b red d21acom i nh 1 gnd 2 out 3 vcc 4 x1 osc_cmos_4pin 3.3v cl k 3.3v r204100k r ed d20a green d20b r205 560 c203 0.01uf r20710k r20645.3k out 1 gnd 2 seti 3 on 4 in 5 fl ag 6 u21max4995a in 1 gnd 2 en 3 gs 4 p ok 5 fb 6 byp 7 out 8 u22max8902b maxim *maxi m_l ogo gnd gnd gnd gnd gnd scl sda 1 2 3 4 5 6 j22hdr_6p in vdut maxim integrated 12 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
figure 6. max31730u ev kit pcb layouttop (max) maxim integrated 13 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
figure 7. max31730u ev kit pcb layoutbottom (max) maxim integrated 14 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
figure 8. max31730t ev kit pcb layouttop (tdfn) maxim integrated 15 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
ordering information part ic package type MAX31730UEVKIT# 10 max ev kit max31730tevkit# 12 tdfn ev kit #denotes rohs compliant. figure 9. max31730t ev kit pcb layoutbottom (tdfn) maxim integrated 16 www.maximintegrated.com evaluates: max31730 max31730 evaluation kit downloaded from: http:///
revision history revision number revision date description pages changed 0 8/13 initial release 1 6/15 added tdfn package version of the ev kit and revised user-supplied remote diode section and component list. 1, 2, 7, 9, 11, 15, 16 maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and speciications without n otice at any time. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. ? 2015 maxim integrated products, inc. 17 evaluates: max31730 max31730 evaluation kit for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:///

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