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evaluation board user guide ug - 138 one technology way ? p. o. box 9106 ? norwood, ma 02062 - 9106, u.s.a. ? tel: 781.329.4700 ? fax: 781.461.3113 ? www.analog.com evaluating the adt7320/adt7420 temperature sensors please see the last page fo r an important warning and legal terms and conditions . rev. 0 | page 1 of 16 features supports the adt7320 and adt7420 temperature sensors powered from usb port no additional power supply required pc s oftware for control of temperature sensors supported operating systems: windows 200 0 and higher additional external evaluation board for remote temperature measurements kit contents fully fitted printed circuit board (pcb) with usb interface additional external pcb evaluation s oftware cd usb c able documentation general description this user guide describes the adt7x20 evaluation board hardware and software and includes detailed schematics and pcb layout artwork. the ad t7x20 evaluation board is a compact, easy - to - use platform for evaluating all features of the adt7320 and adt7420 temperature sensors. the evaluation kit allows the user to evaluate the performance of the adt7320 and adt7420 temperature sensors using a pc. the kit consists of two boards; a main board connected to the pc th r ough the usb port and an external board. the external board is attached to the main board using wires that can withstand high temperatures , and can be used for remote temperature measurements in oil baths or ovens where the temperature exceeds the specifications of the usb cable. the evaluation software allows the user to select either the main board or t he external board , as well as the desired temperature sensor device. when using the adt7x20 evaluation board, in addition to this user guide , the user should also consult the adt7320 and adt7420 data sheets (available at the analog devices, inc., website , www.analog.com ). 09023-001 figure 1 . adt7x20 evaluation board main board 09023-002 figure 2. adt7x20 evaluation board external board
ug - 138 evaluation board user guide rev. 0 | page 2 of 16 table of contents features .............................................................................................. 1 kit contents ...................................................................................... 1 general description ......................................................................... 1 revision history ............................................................................... 2 evaluation board software .............................................................. 3 software installation .................................................................... 3 using the adt7x20 evaluation software ................................. 3 device selection ............................................................................3 board selection ..............................................................................3 device evaluation software .........................................................4 evaluation board schematics and ar twork ...................................7 ordering information .................................................................... 12 bill of materials ........................................................................... 12 related lin ks ................................................................................... 12 revision history 12 /12 revision 0: initial version
evaluation board user guide ug - 138 rev. 0 | page 3 of 16 evaluation board sof tware software installatio n the adt7x20 evaluation kit includes the evaluation software on a cd- rom. the software is compatible with windows? 2000/xp , vista, and windows 7 . the evalua tion software must be installed before connecting the evaluation board to the usb port of the pc to ensure that windows recognize s it and to ensure that the driver is installed correctly. to install the software , run the adt7x20 evaluation software install.exe file from the cd - rom . after the installation has completed, connect the ad t7x20 evaluation board to the pc usb port using the cable supplied. when the evaluation board is detected by the operating system , pro ceed through any dialog boxes that appear to finalize the installation . using the ad t7x2 0 evaluation softwar e during installation, a shortcut to the evaluation software is installed in the start menu. from the start menu, select all programs , then analog devices , and click adt7x20 evaluation software . you can l aunch the software using either this shortcut or by running the adt7x20 evaluation software.exe file from the installation directory. device s election when the evaluation software is launched, a wi ndow appear s prompting you to select the desired device , as shown in figure 3 . 09023-003 figure 3 . device selection window the adt7320 uses the spi interface whereas the ad t 7420 uses the i 2 c. other than the control interface, the two devices are identical in performance . board selection the device selected at the previous step in the device selection section can be located either on the main board or on the external board. after the desired device is selected, a window appear s prompting you to select the location of the device (see figure 4 ). 09023-004 figure 4 . on - board/ external device selection wi ndow
ug - 138 evaluation board user guide rev. 0 | page 4 of 16 device evaluation software after you complete the device and board selections , the evalua - tion software loads , allowing full control over the selected device. the software layout is the same for both the adt7320 and adt7420 . there are three tabs in t he evaluation software : ? configuration register ? temperature monitor ? adt7x20 registers the evaluation software also has easy setup and close options. configuration register this tab allows you full control over the configuration register of the selected de vice , as shown in figure 5 . at start up, the evaluation software initializes the configuration register to the default value of 0x90 (hex adecimal ). for more details on how to set the configuration register , consult the device data sheet. . 09023-005 figure 5 . configuration register tab
evaluation board user guide ug - 138 rev. 0 | page 5 of 16 temperature monitor this tab displays the temperature reading from the selected device as well as the status of the alarms. this tab includes five control options (see figure 6 ): ? temperature threshold ? temperature value ? set temperature limits ? log data ? temperature va lu e s temperature threshold if the temperature goes above or below the h igh and l ow l imits defined in the s e t te mperature limits section or above the c ritical threshold, the temperature high limit threshold , temperature low limit threshold , and temperature critical threshold indicators appear green. temperature value this displays the actual adc temperature in twos complement and degrees celsius respectively. set temperature limits this section allows you to update the high, low, critical, and hysteresis limits. these adc values are loaded into the device. because the conversion format is twos complement, any value o ver 4095 is a negative number. to change the value, you can use the arrow keys or type a number in the box to update the limits. the graph labeled temperature conversion measurement displays the variation in time of the high and low temperature limits as w ell as the current temperature in twos complement format . at startup, the evaluation software initializes the tempera - ture limits registers (t high , t low , t crit , and t hyst ) to the default values shown in figure 6 . 09023-006 figure 6 . temperature monitor
ug - 138 evaluation board user guide rev. 0 | page 6 of 16 log data the software can save the acquired data in to an excel or t ext file by clicking the log data button , which opens the dialog box show n in figure 7 . from this window, you can choose to log the adc , the celsius value , or both , as well as set the logging interval ( see figure 7 ). 09023-007 figure 7 . data logging temperature va lu es this section gives you an update of all the t emperature limits and the t emperature reading of the part. these values are a replica of the adc values in the set temperature limits section, converted into degrees celsius. the graph labeled temperature in celsius displays the variation in time of the high and low temperature limits as well as the current tempera - ture in degrees celsius. register map this section displays all the r egister values for the part. yo u can read or write to any register by using the read and write b uttons (see figure 8 ). easy setup the easy setup button restores all registers with default values. close this button closes the current window and returns to the selection window (see figure 3 ). 09023-008 figure 8 . register map
evaluation board user guide ug - 138 rev. 0 | page 7 of 16 evaluation board sch ematics and artwork 09023-009 d2 figure 9. adt7x20 evaluation board schematic main board temperature sensor circuit
ug - 138 evaluation board user guide rev. 0 | page 8 of 16 09023-010 figure 10 . adt7x20 evaluation board schematic main board usb controller circuit
evaluation board user guide ug - 138 rev. 0 | page 9 of 16 09023-011 adt7420ucpz adt7320ucpz i 2 c address is set through software figure 11 . adt7x20 evaluation board schematic external board circuit
ug - 138 evaluation board user guide rev. 0 | page 10 of 16 09023-012 figure 12 . adt7x20 evaluation board main board comp onent side ( layer 1) 09023-013 figure 13 . adt7x20 evaluation board main board solder side ( layer 2) 09023-014 figure 14 . adt7x20 evaluation board main board silkscreen
evaluation board user guide ug - 138 rev. 0 | page 11 of 16 09023-015 09023-016 figure 15 . adt7x20 ev aluation board external board component side ( layer 1) figure 16 . adt7x20 evaluation board external board solder side ( layer 2) 09023-017 figure 17 . adt7x20 evaluation board external board silkscreen
ug - 138 evaluation board user guide rev. 0 | page 12 of 16 ordering in formation bill of materials table 1 .component listing main board qty . reference designator description value supplier/ordering no. 2 c1, c2 50 v npo smd c eramic c apacitor 22 pf farnell 722005 1 c3 10 v smd t antalum c apacitor 47 f farnell 1432591 1 c4 10 v smd t antalum c apacitor 2.2 f farnell 498646 14 c5, c6, c7, c8, c9, c10, c12, c13, c14, c15, c16, c18, c19, c20 16 v x7r m ultilayer c eramic c apacitor 0.1 f farnell 1216538 3 c11, c21, c22 10 v smd t antalum c apacitor 10 f f arnell 197130 1 c17 10 v dc y5v c eramic c apacitor 1 f farnell 3188840 1 d1 green led vlmp31g2j1 farnell 1328320 2 d2, d3 red led vlms31j1k2 farnell 1328350 1 j1 usb mini - b connector 54819 - 0579 digi - key wm17116ct - nd 1 j2 10- pin terminal block n/a farn ell 9632179 2 q1, q2 low power bipolar transistor bc807 farnell 1081222 1 r1 smd resistor 0 ? farnell 772227 1 r2 smd resistor 10 k? farnell 9330399 2 r3, r6 smd resistor 100 k? farnell 911471 2 r4, r5 smd resistor 2.2 k? farnell 196319 3 r7, r11, r1 3 smd resistor 270 ? farnell 9331964 6 r8, r9, r10, r12, r14, r15 smd resistor 10 k? farnell 911355 1 u1 temperature sensor ic adt7320upcz analog devices adt7320upcz 1 u2 temperature sensor ic adt7420upcz analog devices adt7420upcz 1 u3 64 kb i 2 c seria l eeprom 24lc64 digi - key 24lc64- i/sn -nd 1 u4 precision low dropout voltage regulator adp330 3 ar z -3.3 analog devices adp330 3ar z- 3.3 1 u5 dual spdt switch adg787brmz analog devices adg787brmz 1 u6 usb microcontroller cy7c6813-56lfc embassy cy7c68013 -56lfc 1 y1 smd crystal 24 mhz farnell 9509658 table 2 . component listing external board qty . reference designator description value supplier/ordering number 2 c1, c3 16 v x7r multilayer ceramic capacitor 0.1 f farnell 1216538 2 c2, c4 10 v smd tantalum capacitor 10 f farnell 197130 2 d1, d2 green led vlmp31g2j1 farnell 1328320 4 r1, r2, r4, r5 smd resistor 10 k? farnell 9330399 2 r3, r6 smd resistor 270 ? farnell 9331964 1 u1 temperature sensor ic adt7 320upcz analog devices adt7320upcz 1 u2 temperature sensor ic adt7420upcz analog devices adt7420upcz related links resource description adt7320 product page, 0.25c accurate, 16 - bit digital spi temperature sensor adt7420 product page, 0.25c accurate, 16 - bit digital i 2 c temperature sensor
evaluation board user guide ug - 138 rev. 0 | page 13 of 16 notes
ug - 138 evaluation board user guide rev. 0 | page 14 of 16 notes
evaluation board user guide ug - 138 rev. 0 | page 15 of 16 notes
ug - 138 evaluation board user guide rev. 0 | page 16 of 16 notes esd caution esd (electrostatic discharge) sensitive device . charged devices and circuit boar ds can discharge without detection. although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy esd. therefore, proper esd precautions should be taken to avo id performance degradation or loss of functionality. legal terms and conditions by using the evaluation board discussed herein (together with any tools, components documentation or support materials, the evaluation board), you are agreeing to be bound by the terms and conditions s et forth below (agreement) unless you have purchased the evaluation board, in which case the analog devices standard terms and conditions of sale shall govern. do not use the evaluation board until you have read and agreed to the agreement. your use of the evaluation board shall signify your acceptance of the agreement. this agreement is made by and between you (customer) a nd analog devices, inc. (adi), with its principal place of business at one technology way, norwood, ma 02062, usa. subject to the terms and conditions of the agreement, adi hereby grants to customer a free, limited, personal, temporary, non - exclusive, non - sublicensable, non - transferable license to use the evaluation board for evaluation purposes only. customer understands and agrees that the evaluation board is provided for the sole and exclusive purpose referenced above, and agrees not to use the evaluation board for any other purpose. furthe rmore, the license granted is expressly made subject to the following additional limitations : customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the evaluation board; and (i i) permit any third party to access the evaluation board. as used herein, the term third party includes any entity other than adi , customer, their employees, affiliates and in - house consultants. the evaluation board is not sold to customer; all rights not expressly granted herein, including ownership of the evaluation board, are reserved by adi. confidentiality. this agreement and t he evaluation board shall all be considered the confidential and proprietary information of adi. customer may not disclose or transfer any portion of the evaluation board to any other party for any reason. upon discontinuation of use o f the evaluation boar d or termination of this agreement, customer agrees to promptly return the evaluation board to adi. additional restrictions. customer may not disassemble, decompile or reverse engineer chips on the evaluation board. customer shall inform adi of any occurre d damages or any modifications or alterations it makes to the evaluation board, including but not limited to soldering or any other activity that affects the material content of the evaluation board. modifications to the evaluation board must comply with a pplicable law, including but not limited to the rohs directive. termination. adi may terminate this agreement at any time upo n giving written notice to customer. customer agrees to return to adi the evaluation board at that time. limitation of liability. t he evaluation board provided hereunder is provided as is and adi makes no warranties or representations of any kind with respect to it. adi specifically disclaims any representations, endorsements, guarantees, or warranties, express or implied, related t o the evaluation board including, but not limited to, the implied warranty of merchantability, title, fitness for a particula r purpose or noninfringement of intellectual property rights. in no event will adi and its licensors be liable for any incidental, special, indirect, or consequential damages resulting from customers possession or use of the evaluation board, including but not limited to lost profits, delay costs, labor costs or loss of goodwill. adis total li ability from any and all causes shall be limited to the amount of one hundred us dollars ($100.00). export. customer agrees that it will not directly or indirectly export the evaluation board to another country, and that it will comply with all applicable united states federal laws and regulations relating to exports. governing law. this agreement shall be governed by and construed in accordance with the substantive laws of the commonwealth of massachusetts (excluding conflict of law rules). any legal action regarding this agreement will be hear d in the state or federal courts having jurisdiction in suffolk county, massachusetts, and customer hereby submits to the personal jurisdiction and venue of such courts . the united nations convention on contracts for the international sale of goods shall not apply to this agreement and is exp ressly disclaimed. ? 2012 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. ug09023 -0- 12 /12(0)

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