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general description the MAX14921 evaluation kit (ev kit) demonstrates a high-accuracy 16-cell battery-management reference design. the MAX14921 is a high-accuracy 16-cell mea - surement analog front-end (afe) in an 80-pin tqfp surface-mount package. the ev kit features an adc and reference, and an isolated interface to a pc through a usb port to easily measure all cell voltages. cell stacks up to 16 cells or 65v can be monitored, whichever is lower. the ev kit circuit demonstrates all the features of the device through a gui application on a windows ? -based pc. benefts and features 16-cell/65v (max) stack operating voltage range built-in isolated usb interface to a windows- based pc plugh-and-play gui demonstrates all the major features of the MAX14921 c firmware in c available upon request screw terminal battery connector proven pcb layout fully assembled and tested 19-6668; rev 0; 4/13 ordering information appears at end of data sheet. MAX14921 ev kit photo component list windows is a registered trademark and a registered service mark of microsoft corporation. block diagram appears at end of data sheet. designation qty description c1Cc16 16 1.2f 10%, 16v x7r ceramic capacitors (0805) kemet c0805c125k4ractu c17 1 10f 10%, 10v x5r ceramic capacitor (0805) kemet c0805c106k8pac c18Cc22, c30, c107, c126Cc129, c135, c138 13 0.1f 10%, 16v x7r ceramic capacitors (0603) murata grm188r71c104k c23, c31, c108Cc111, c115, c130, c131, c136 10 1f 10%, 16v x7r ceramic capacitors (0603) murata grm188r71c105k c24 1 0.1f 10%, 100v x7r ceramic capacitor (0603) murata grm188r72a104ka35d c25, c29 2 100pf 10%, 16v x7r ceramic capacitors (0603) avx 0603yc101kat2a c27, c28 2 0.01f 5%, 16v x7r ceramic capacitors (0603) avx 0603yc103jat2a MAX14921 evaluation kit evaluates: MAX14921
maxim integrated 2 component list (continued) designation qty description c101, c103, c104, c132, c137 5 4.7f +80%/-20%, 10v y5v ceramic capacitors (0603) murata grm188f51a475ze20d c105, c106 2 18pf 5%, 50v np0 ceramic capacitors (0603) murata grm1885c1h180ja01d c112Cc114, c116Cc119 0 not installed, ceramic capacitors (0603) c133 1 4.7f 10%, 16v x7r ceramic capacitor (0603) murata grm21br71c475ka73l c134 1 0.47f 10%, 16v x5r ceramic capacitor (0603) tdk c1608x5r1c474k d1, d101, d102 3 100v, 200mw schottky diodes (sod123) diodes inc. bat46w-7-f d2 1 68v, 500mw zener diode (sod123) on semi mmsz5266bt1g d3 0 not installed, diode (sod123) l101 1 600?, 200ma ferrite chip (0805) murata blm21ag601sn1 led101, led103 2 red leds lite-on ltst-c150ckt led102 1 green led lite-on ltst-c150gkt p2 1 24-pin power connector weidmuller 1841850000 p101 0 not installed, 72-pin dual-row connector header, 0.1in centers sullins pec36daan p102, p105 2 usb micro-b connectors hirose zx62-b-5pa(11) p103 0 not installed, usb type-a connector mill-max 896-43-004-00-000000 p104 0 not installed, 9-pin header, 0.1in centers samtec tsw-150-07-t-s p106Cp113 0 not installed, test points designation qty description q1Cq16 16 30v n-channel fets (sot23) on semi ntr4170nt1g or nxp 2n7002bk,215 q101Cq103 3 40v npn bipolar transistors (sot23) on semi mmbt3904lt3g r1, r40Cr54 16 100? 5% resistors (0603) r2, r58 2 220? 1% resistors (0603) r3, r4, r101, r108, r131, r133, r135, r140 8 10k? 1% resistors (0603) r7Cr22 16 3.3k? 5% resistors (0603) r23Cr38 16 33? 5%, 1w resistors (2512) r39 1 100? 5% resistor (0805) r56, r57 2 1k? 1% resistors (0603) r59, r60, r126, r129 4 10k? 1% resistors (0603) r61, r106, r107, r109, r110, r116Cr128 0 not installed, resistors (0603) r102, r103 2 137? 1% resistors (0805) r111 1 332? 1% resistor (0603) r112 1 39.2k? 1% resistor (0603) r113 1 102k? 1% resistor (0603) r114 1 3.92k? 1% resistor (0603) r115 1 1.5k? 1% resistor (0603) r130 1 1k? 5% resistor (0805) r132 1 6.04k? 1% resistor (0603) r134 1 3.32k? 1% resistor (0603) r136, r137 2 301k? 1% resistors (0603) r138, r139 2 20k? 1% resistors (0603) r141 1 28k? 1% resistor (0603) s101, s102 2 momentary pushbutton switches omron b3fs-1000p s103Cs106 0 not installed, momentary pushbutton switches t101 1 1:1:2.6:2.6 1.5kv rms isolation module halo electronics tgm-h281nf MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 3 component list (continued) * ep = exposed pad. component suppliers note: indicate that you are using the MAX14921 when contacting these component suppliers. supplier phone website avx north america 864-967-2150 www.avx.com citizen america corp. 310-781-1460 www.citizencrystal.com diodes incorporated 805-446-4800 www.diodes.com halo electronics, inc. 650-903-3800 www.haloelectronics.com hirose electric co., ltd. 81-3-3491-9741 www.hirose.com kemet corp. 864-963-6300 www.kemet.com lite-on, inc. 408-946-4873 www.us.liteon.com murata americas 800-241-6574 www.murataamericas.com omron corp. www.omron.com on semiconductor 602-244-6600 www.onsemi.com samtec, inc. 800-726-8329 www.samtec.com stmicroelectronics 408-452-8585 www.us.st.com sullins electronics corp. 760-744-0125 www.sullinselectronics.com tdk corp. 847-803-6100 www.component.tdk.com designation qty description u1 1 high-accuracy 16-cell measurement afes (80 tqfp) maxim MAX14921ecs+ u2 1 4.096v voltage reference (8 so) maxim max6126aasa41+ u3 1 16-bit analog-to-digital converter (10 msop) maxim max11163eub+ u4 1 op amp (5 sc70) maxim max9620axk+ u101 1 arm-based 32-bit microcontroller (64 lqfp) stmicro stm32f101ret6 u102 0 not installed, quad 6mbps level translator (12 tqfn) maxim max3395eetc+ u103, u105 0 not installed, 1.5a current-limit switches (8 tdfn-ep*) maxim max14523aata+ u104 0 not installed, usb peripheral/host controller with spi interface (32 tqfp) maxim max3421eetj+ designation qty description u107, u108 2 6-channel 600v rms digital isolators (16 so) maxim max14850ase+ u109, u110 2 12v adjustable ldos (6 tdfn-ep*) maxim max8880ett+ u111 1 3w primary-side transformer h-bridge driver (8 so) maxim max256asa+ u112 1 usb to serial uart (28 ssop) ftdi ft232rl-reel u113, u114 2 1.5a current-limit switches (8 tdfn-ep*) maxim max14523aata+ y101 1 8mhz, 18pf crystal (hc49/us) citizen hcm49-8.000mabj-ut y102 0 not installed, 12mhz 18pf crystal (4 smd) cts 406c35d12m00000 1 pcb: MAX14921 advanced eval pcb MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 4 figure 1. detachable battery connector figure 2. files required to run the application quick start required equipment MAX14921 ev kit the two files: the MAX14921 eval pcb applica - tion (MAX14921 eval pcb.exe) and the dll msvcr100.dll visit www.maximintegrated.com/evkitsoftware to download the latest version of the ev kit software pc running windows, with 1 spare usb port usb to micro-usb cable stack of batteries to test procedure step 1: attach battery note: total battery stack voltage cannot exceed 65v . you risk failure of the device if you exceed this voltage. look at the detachable battery connector, and see how it mates to the ev kit, see figure 1. connect the bottom cell of the battery stack (the lowest voltage) to the vc0 screw terminal and to the adjacent gnd screw terminal. be sure to use two separate wires for these connections. connect the top of that cell (also connected to the bottom of the second cell) to the vc1 screw terminal. continue in this fashion until you connect the top of the 16th cell of the battery stack (the highest voltage) to the vc16 screw terminal and the power screw terminal. be sure to use two separate wires for these connections. what if you have less than 16 cells in your battery stack? the device can handle 3C16 cells. for example, you have only 12 cells, in that case, connect the top of the 12th cell (the highest voltage) to all vc12Cvc16 and power screw terminals. why do i need to connect the top and the bottom of the battery stack twice? the device takes just a small amount of current from the battery stack to operate. this tiny power consumption is routed through the power and gnd terminals. providing a separate measurement trace to the top and the bottom of the battery stack ensures that even this tiny current does not affect cell measurement accuracy. plug the terminal strip portion of the connector into the mating plug on the ev kit. see figure 1. step 2: run the application visit www.maximintegrated.com/evkitsoftware to download the latest version of the ev kit software, MAX14921 evkit software.zip. save the ev kit software to a temporary folder. open the .zip file and extract the .exe file to your preferred location. the .exe file is the actual ev kit gui and not an install program. you can store the .exe file wherever you like and then uninstall it later by simply deleting the .exe file. MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 5 ensure that both files the application (MAX14921 eval pcb and the dll msvcr100.dll) are in the same folder. navigate to the folder with the files and select the MAX14921 eval pcb application. double-click on it to run the application. see figure 2. if i have the files on a separate drive, do i need to move these files to my pc? if you have the files on a usb memory device, there is no need to move them. as long as the two files remain in the same folder, the applica - tion runs anywhere, including from a usb memory device. does the application install a driver on my pc? no, it does not. the application needs no drivers other than those built into windows. once the application is running, you should see a window similar to the one in figure 3. most of the data items are blank and are automatically filled in when the application detects an ev kit attached to any usb port on the computer. step 3: attach the ev kit to the pc use the usb cable to attach the ev kit to the pc. the correct usb connector on the ev kit is labeled p102, and is near the top left of the pcb, under s101, reset. led103, to the left of the isolation transformer glows red when the ev kit is properly powered (see figure 4). also, led102, towards the middle of the pcb, blinks green when the microprocessor is running the firmware. once you have correctly attached the ev kit to the pc, the application automatically starts reporting cell voltage data. detailed description of hardware the MAX14921 ev kit is a fully assembled and tested cir - cuit board demonstrating the capabilities of the MAX14921 high-accuracy 16-cell battery management afe ic in an 80-pin surface-mount tqfp package. this ev kit works with a pc-based gui demonstrating all the major features of the device. the ev kit also features a max6126 preci - sion voltage reference and a max11163 16-bit, 500ksps serial adc. the MAX14921 and the analog portion of the adc are powered by the battery cell stack. all other ev kit circuits are powered from the usb interface. ensure that the total cell stack voltage does not exceed 65v. reduce the number of cells in the stack, if needed, to keep to 65v or lower. figure 3. MAX14921 ev kit gui figure 4. MAX14921 ev kit attachment attach to pc here MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 6 analog cell voltage acquisition the heart of the ev kit is the analog signal path. the MAX14921 (u1) operates in two major phases. in the first phase, cell voltages present at the cell stack connector (p2) are acquired onto the sampling capacitors c1Cc16 through 100 series resistors r1 and r40Cr54. these resistors limit the current during fault conditions. the default gui sampling time of 4ms is optimized to work with these resistors and capacitors. all cell voltages are captured simultaneously. in the second phase, captured cell voltages are level shift - ed down and presented to the adc (u3) for conversion. a small circuit (r2 and c25) filters the signal between the MAX14921 and the max11163 adc. to improve accu - racy, an external voltage reference, max6126 (u2), is used to provide a stable reference to the adc. auxiliary inputs (t1Ct3) the MAX14921 also includes three general-purpose analog inputs, ranging from 0 to 5v that can be multi - plexed to the adc for conversion. measuring temperature through inexpensive thermistors is one common use for these extra inputs. inputs t2 and t3 on the ev kit are preset to accept a 10k thermistor. the max9620 op amp (u4) buffers the reference voltage to 10k pullup resistors (r59 and r60), while filtering is done with r56, r57, c27, and c28. input t1 is uncommitted. the pullup resistor (r61) for this input is not installed, and different filter components (r58 and c29) are used, optimized for faster input signals. cell balancing the ev kit includes transistors q1Cq16 and 33 power resistors for cell-balancing applications. these transistors can be enabled or disabled, using the spi interface, in any combination at any time for passive cell-balancing purposes. power and isolation the ev kit accepts power from either usb con - nector, p102 or p105. to use the supplied gui, connect to p102. p105 is used only when reprogram - ming microprocessor u101. because a different protocol is used for reprogramming, the gui does not recognize the ev kit if the usb cable is plugged in to p105. two max14523a power switches (u113 and u114) auto - matically power the ev kit from either usb connector. a max8880 linear regulator (u109) provides a clean 3.3v supply for the microprocessor (u101) and related circuitry. the microprocessor uses the q101 and q102 circuit to switch in or out a 1.5k pullup resistor on the usb dp line, to implement usb suspend mode. to avoid any damage to the pc in the case of accidental miswiring, the cell voltage acquisition circuitry is elec - trically isolated from the microprocessor circuitry and usb interface. two max14850 digital isolators (u107, u108) provide this isolation for the spi and other digital signals and a max256 transformer driver (u111), along with transformer t101 provide an isolated supply to a max8880 linear regulator (u110). the max8880 provides a clean 5v supply for all circuits in the analog capture path, with the exception of the internal supply of the MAX14921 and the analog supply of the max11163 adc, which power from the MAX14921s internal 5v regulator. detailed description of software the windows-based graphical-user interface (gui) application is simple to use and demonstrates all the important features of the device. the application auto - matically detects the presence of an ev kit. if the applica - tion is run before any ev kit is attached, the fields appear mostly blank, as seen in figure 3. once an ev kit is detected, fields are automatically filled in. status section figure 5 shows the status window, located at the bottom-right corner of the application window. it indicates the status of the ev kit connection to the pc. the text in the window indicates whether the application sees an ev kit or not. it indicates either evk attached, or evk detached. the third line details the real-time instructions to the ev kit from the application. table 1 includes a detailed explana - tion for each label. control section much of the control and status information for the ev kit is available in the top-right section of the application. figure 6 and table 2 detail the available controls and indicators. MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 7 figure 5. status section figure 6. control section table 1. ev kit status labels table 2. ev kit control section details (figure 6) label description idling the application has made one measurement, and continues measuring once the user has clicked either the measure or the measure once button. measuring the application is capturing data continuously and presenting it in the application window. offset cal the device is performing an offset calibration, as detailed in the max14920/MAX14921 ic data sheet. open chk the device is performing an opens check, as detailed in the max14920/MAX14921 ic data sheet. streaming the application is capturing data at speed from the device, and is writing it to a disc fle. waiting the application is waiting for an ev kit to be attached to the pc through a usb port. item label read/write description 1 number of cells write enter the number of cells in the battery stack here, from 3C16 cells. this affects how many cell voltages display in the application window, as well as how many cell voltages are recorded when streaming data to a fle. 2 sample time write sets the sample time, from 1ms to 1,000ms. this refers to the t sampl specifcation in the max14920/MAX14921 ic data sheet. this is the length of time that the device stays in sample phase. setting this too low affects how accurately the cell voltages are measured. setting it too high limits how often the cell voltages can be read. refer to figure 5 in the max14920/MAX14921 ic data sheet for more details. the default value of 4ms is optimized to work with the 1.2f sampling capacitors and the 100? series resistors. 3 settling time write sets the delay from when the device provides a cell voltage sample to when the adc starts conversion, from 1s to 10,000s. this refers to the t set specifcation in figure 5 in the max14920/MAX14921 ic data sheet. leave at the default of 50s. 1) cell selection entry 5) product id indicator 6) die rev indicator 7) ldo uv indicator 8) ready bit indicator 9) over temp indicator 10) MAX14921 enable 11) engage ow detect 12) perform offset cal 13) measure repeatedly 14) measure once 15) cell balance global 2) sample time entry 3) settling time entry 4) repeat time entry MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 8 table 2. ev kit control section details (figure 6) (continued) item label read/write description 4 repeat time write sets the delay between acquisitions of a set of cell voltages. for example, at the default 10ms, the device samples cell voltages 100 times per second. this entry is ignored by the application when it updates the cell voltages directly on the window. however, when streaming data to a fle, this parameter sets how often a new data set is written to the fle. the repeat time must be at least 1ms greater than the sample time. if not, the repeat time is about 1ms greater than the sample time. 5 product read this value is obtained from the device when the ev kit is attached to the pc. 6 die revision read this value is obtained from the device when the ev kit is attached to the pc. 7 va uv read this status indicator is updated regularly once the ev kit is attached to the pc. a red indicator means that the internal 5v ldo is unable to provide the correct voltage to the device or to the attached external circuitry. 8 ready to operate read this status bit is updated regularly from the device when the ev kit is attached to the pc. a red indicator means that there is something wrong with the device. 9 thermal shutdown read this status bit is updated continuously from the device when the ev kit is attached to the pc. a red indicator means that the device is too hot. 10 power down action click this control button to toggle the en pin on the device and enable or disable the ic. 11 detect open wires action click this control button to implement open-wire detection as detailed in the first method of open-wire detection section in the max14920/MAX14921 ic data sheet. this detection is not continuous and happens once each time this control is pushed. it updates the open-wire (ow) indicators in the cell voltage readout section of the application window. indicators are dimmed green or red when this information is considered stale. 12 offset cal action click this control button to implement the offset calibration feature, as detailed in the buffer amplifer offset calibration section in the max14920/MAX14921 ic data sheet. the output buffer offset is minimized once calibration is complete. 13 measure action click this control button to enable continuous reading of the cell voltages, the cell u/ov bits, and the t1Ct3 voltages. the application updates 6 to 7 times per second unless the sample time is set too high. 14 measure once action click this control button to disable continuous reading. only one set of data is measured and presented in the application window when this button is pushed. 15 balance enable/disable selection this global control either disables or enables cell balancing for all cells whose balance checkboxes are checked. cell balancing can be individually enabled with the balance checkboxes. MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 9 cell readout section the top-left section is where cell voltages are reported. overvoltage, undervoltage, and open-wire detection are also indicated here. cell balancing for individidual cells can be enabled/disabled in this section as well. (figure 7) figure 7. cell readout section table 3. ev kit cell readout section details (figure 7) item label read/write description 1 voltage read these are the cell voltages. cell voltages are reported individually with 0.1mv resolution. 2 u/ov read these indicators are updated each time cell voltages are reported. a red indicator means that the cell voltage is either too high (> 5v) or too low (< 1.5v). 3 ow read these indicators report the result of the most recent open-wire detection. gray boxes indicate no open-wire detection has yet been requested. refer to the max14920/MAX14921 ic data sheet for details regarding how to use the status indicators to determine open-wire conditions. 4 balance write check these boxes to enable/disable cell balancing for individual cells. when the global cell-balance control is enabled, each checked box activates the cell- balancing switch for that corresponding cell. see the detailed description of hardware section for more details. 5 pack read this feld reports the mathematical sum of the individual cell voltages. it is the voltage of the entire cell stack. 1) cell voltage readout 2) uv/ov indicator 5) total voltage readout 3) last ow detect status 4) individual cell balance check boxes MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 10 auxiliary input section the device also has three general-purpose analog inputs (t1Ct3) whose voltages can also be presented to the adc. unlike the cell voltage inputs, the t_ inputs are neither level shifted nor sampled. the auxiliary input section provides a way to see these t inputs in action. figure 8 and table 4 detail the available control and actions. streaming data to a file the ev kit can collect cell and t_ input data and stream it to a file. this is when the repeat time parameter is used. at the default setting of 10ms, data is logged at 100 data sets per second. to stream cell data, push the stream to file control. a save as dialog box opens to select a file to write the data to. once a file is selected, click the save button. streaming continues until the stop streaming control is pushed. note that you can quickly end up with large files. stream data file format the data is stored in the streaming file as text. the first line indicates what range of cell data is captured, up to 16 cells, and whether each t_ input is also captured or not. each subsequent line or pair of lines represents one captured data set. actual data starts with the second line. this line records up to 16 cell voltages, starting with the highest numbered cell down to the first cell (cell 1). if any of the t_ inputs are enabled, the next line is up to 3 t_ input voltages. if no t_ input is enabled, the third line is instead the next set of cell voltages, captured one repeat time later. for example, in figure 10, the first line of the file indicates that all 16 cell voltages are captured, as well as all three auxiliary inputs. the second line shows that cell 16 read 0.0392v and cell 15 read 0.0160v. the third line shows that t1 read 1.1506v, t2 read 4.0587v, and t3 read 4.0950v. this occurred at one time instant. the fourth and fifth line would report the cell and auxiliary inputs, like lines 2 and 3, only one repeat time later. note that at the default 100 samples per second (10ms repeat time), the data file can quickly grow quite large. table 4. ev kit auxiliary input section details (figure 8) item label read/write description 1 voltage read these are the voltages read from the corresponding t_ input. each t_ input must be enabled for its voltage to be acquired and displayed. 2 enable write check the box to enable or disable the corresponding t_ input. when enabled, the t_ input voltage is read and converted at the same repetition rate as the cell voltages. 3 buffer write check the box to enable or disable the optional buffer for each t_ input. when unchecked, the corresponding t_ input connects directly to the adc. use this setting for high-drive analog sources. when checked, the t_ input is unity-gain buffered to the adc. use this for low-drive analog signals. 4 settling delay write this is the delay time, in microseconds, from when the device presents a t_ signal to when the adc conversion begins. MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 11 figure 8. auxiliary input section figure 9. example streaming data output 4) settling delay entry 3) buffer control 2) enable control 1) auxiliary voltage readout MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 12 figure 10a. MAX14921 ev kit schematic (sheet 1 of 5) MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 13 figure 10b. MAX14921 ev kit schematic (sheet 2 of 5) MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 14 figure 10c. MAX14921 ev kit schematic (sheet 3 of 5) MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 15 figure 10d. MAX14921 ev kit schematic (sheet 4 of 5) MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 16 figure 10e. MAX14921 ev kit schematic (sheet 5 of 5) MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 17 figure 11. MAX14921 ev kit component placement guidecomponent side MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 18 figure 12. MAX14921 ev kit component placement guidesolder side MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 19 figure 13. MAX14921 ev kit pcb layouttop copper MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 20 figure 14. MAX14921 ev kit pcb layoutlayer 2 (ground) MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 21 figure 15. MAX14921 ev kit pcb layoutlayer 3 (power) MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 22 figure 16. MAX14921 ev kit pcb layoutbottom copper MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 23 block diagram max 256 transfo r mer max 14850 isolator max 14850 isolator arm microcontroller rectifier max 8880 ldo max 6126 ref max 9620 max 11163 adc v a v out spi max 14921 connector max 8880 ldo usb spi 3 . 3 v 4 . 096 v 4 . 096 v 5 v 5 v MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
maxim integrated 24 # denotes rohs compliant. ordering information part type MAX14921evkit# ev kit MAX14921 evaluation kit evaluates: MAX14921 www.maximintegrated.com
? 2013 maxim integrated products, inc. 25 revision history revision number revision date description pages changed 0 4/13 initial release 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 specifcations without notice at any time. MAX14921 evaluation kit evaluates: MAX14921 maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.

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