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general description the max1168 evaluation system (ev system) is a com- plete 8-channel, 16-bit data-acquisition system that is comprised of a max1168 evaluation kit (ev kit) and a maxim 68hc16module-dip microcontroller (?) module. order the complete ev system (max1168evc16) for a comprehensive evaluation of the max1168 using a per- sonal computer (pc). order the ev kit (max1168evkit) separately if the 68hc16module-dip module has been purchased with a previous maxim ev system, or for custom use in other c-based systems. features proven pc board layout windows 95/98/2000/xp-compatible evaluation software convenient on-board test points fully assembled and tested evaluates: max1068/max1168 max1168 evaluation kit/evaluation system ________________________________________________________________ maxim integrated products 1 19-2994; rev 0; 9/03 max1168evc16 system component list for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information max1168evkit component list windows is a registered trademark of microsoft corp. part ic package interface type max1168evkit 24 qsop user-supplied max1168evc16 24 qsop windows software component suppliers supplier phone website fairchild semiconductor 888-522-5372 www.fairchildsemi.com tdk 847-803-6100 www.component.tdk.com designation qty description c1?18, c21, c22 20 0.1? ? 10%, 16v x7r ceramic capacitors (0603) tdk c1608x7r1c104kt c19, c20 2 10? 20%, 16v x5r ceramic capacitors (1210) tdk c3225x5r1c106m c23 1 1? ? 20%, 10v x5r ceramic capacitor (0805) tdk c2012x5r1a105m c24?31 8 100pf ceramic capacitors (0603) tdk c1608c0g1h101j c32?39 8 0.22? ? 10%, 10v x7r ceramic capacitors (0603) tdk c1608x7r1a224k fb1, fb2 2 surface-mount ferrite beads (0603) tdk mmz1608b601c r1?8 8 100 ? ? 5% resistors (0603) designation qty description r9 r16 8 4.7k ? 5% resistors (0603) r17 r24 8 10 ? 5% resistors (0603) u1 1 16-bit adc (24-pin qsop) maxim max1168cceg u2 1 logic buffer (5-sot23) fairchild semiconductor nc7sz125 u3 u10 8 op amps (sot23-5) maxim max4430euk j1 1 2 x 20 right-angle female connector samtec ssw-120-02-s-d-ra tb0 1 2-circuit terminal block ju1 1 2-pin header ju2 1 3-pin header none 2 shunts none 1 pc board, max1168 ev kit none 1 max1168 ev kit software, cd-rom part qty description max1168evkit 1 max1168 ev kit 68hc16module-dip 1 68hc16 c module note: please indicate you are using the max1168 when con- tacting these component suppliers. note: the max1168 software is included with the max1168 ev kit but is designed for use with the complete ev system. the ev system includes a ? module and the ev kit. if the windows software is not required, the ev kit board can be purchased by itself, without the ? module. note: to evaluate the max1068, request a free sample of the max1068_ceg when ordering the max1168 ev kit.
evaluates: max1068/max1168 max1168 evaluation kit/evaluation system 2 _______________________________________________________________________________________ quick start recommended equipment max1168evc16 (max1168evkit board and 68hc16module-dip) three dc power supplies: +8v to +20v at 0.25a +5v at 0.2a -5v at 0.2a analog signal source: 0 to 4.096v windows 95/98/2000/xp-compatible computer with an available serial (com) port 9-pin i/o extension cable (straight-through female- to-male) procedure do not turn on the power until all connections are complete: 1) verify jumper ju1 is on, disabling dsp mode. 2) verify jumper ju2 is connected to pins 2 3, enabling an 8-bit-wide data-transfer mode. 3) carefully connect the boards by aligning the 40-pin connector of the max1168 ev kit with the 40-pin header of the 68hc16module-dip module. gently press them together. the two boards should be flush against one another. 4) ensure that the c module s sw1 switch is in the off position. 5) connect the +8v to +20v power supply to the c module s terminal block (j2), located next to the on/off switch (sw1) along the top edge of the c module. observe the polarity marked on the board. 6) connect the +5v power supply to the vdd pad (with respect to the gnd pad) on the max1168 ev kit board. 7) connect the -5v power supply to the vee pad (with respect to the gnd pad) on the max1168 ev kit board. 8) connect the 9-pin serial cable from the computer s serial port to the c module s db9 connector (j3). 9) install the max1168 ev kit software on your com- puter by running the install.exe program on the cd-rom. the program files are copied and icons are created in the programs section within the windows start menu. 10) turn on the +5v power supply. next, turn on the -5v power supply. finally, turn on the +8v to +20v power supply and turn on the c module s slide switch sw1 to the on position. 11) start the max1168 ev kit program by clicking on its icon in the programs section within the windows start menu. 12) the windows program will prompt you to click ok for automatic serial port selection. when you click ok , the windows program automatically downloads the file kit1168.c16 to the module. please wait approximately 25 seconds for the download to complete. 13) apply an input signal (0 to +4.096v) between ain0 and gnd. observe the ain0 label on the running windows program. detailed description of software the evaluation software s main window shown in figure 1 displays the voltage and code of the analog-input signals ain0 ain7. the software supports manual read or automatic read operations. separate comboboxes allow quick modifications to the max1168 s control byte. the spi serial clock frequency is adjustable from 4.19mhz to 33khz, and the software s reference value can be changed to match the applied external reference. the provided windows-compatible software supports spi mode (not dsp mode) and also only sup- ports the max1168 ev kit when configured in 8-bit- wide data-transfer mode. table 1 describes all the con- trols on the evaluation software s main window. max1168ev kit files file name function install.exe installs the ev kit files on your computer max1168.exe application program helpfile.htm max1168 ev kit help file uninst.ini uninstalls the ev kit software kit1168.c16 software loaded into the 68hc16 c spi is a trademark of motorola, inc
control description the view menu makes the com port debug form visible the blocksample menu is an ev kit software feature that allows a single channel to be sampled and stored. the data block length is selectable and the data can be saved to a file. block sampling is limited to single-channel read modes only. scan[1:0] = 01 or 11 modes are not supported. for multiple-channel reads, use the read adc button or the autoread checkbox. the device menu allows the user to evaluate either the max1168 or max1068 the help menu allows the user to view the help file or the software s about box the control byte label shows the current control byte setting in hexadecimal the cs[2:0] combobox selects the channel below: 000 cs2 cs1 cs0 = channel 0 001 cs2 cs1 cs0 = channel 1 010 cs2 cs1 cs0 = channel 2 011 cs2 cs1 cs0 = channel 3 100 cs2 cs1 cs0 = channel 4 101 cs2 cs1 cs0 = channel 5 110 cs2 cs1 cs0 = channel 6 111 cs2 cs1 cs0 = channel 7 the scan[1:0] combobox selects the scan mode below: 00 scan1 scan0 = single channel, no scan 01 scan1 scan0 = sequentially scans channel 0 to cs[2:0] 10 scan1 scan0 = sequentially scans channel 4 to cs[2:0]; cs[2:0] 4 11 scan1 scan0 = scan channel cs[2:0] eight times the sel[1:0] combobox selects the reference mode below: 00 sel1 sel0 = internal reference mode 01 sel1 sel0 = ev kit software does not support this mode 10 sel1 sel0 = ev kit software does not support this mode 11 sel1 sel0 = external reference mode the clk combobox selects the clock mode below: 0 ext clk 1 int clk the spi sclk frequency combobox selections are: 02: 4.19mhz 04: 2.10mhz . . . ff: 33khz evaluates: max1068/max1168 max1168 evaluation kit/evaluation system _______________________________________________________________________________________ 3 table 1. software control descriptions
evaluates: max1068/max1168 max1168 evaluation kit/evaluation system 4 _______________________________________________________________________________________ detailed description of hardware max1168 ev system the max1168 ev system is a complete 8-channel, 16- bit data-acquisition system consisting of a max1168 ev kit and a maxim 68hc16module-dip c module. the max1168 ev system is used to evaluate the max1168 8-channel, 16-bit serial adc. see the quick start sec- tion for setup and operating instructions. see table 1 for more information on the provided windows software. max1168 ev kit the max1168 ev kit board provides a proven layout for evaluating the max1168 8-channel, 16-bit adc and can be obtained separately without the c module for use with an existing c. the max1168 ev kit contains two different types of buffers. u2 is a logic buffer to limit the load capacitance that is seen by the dout line of the max1168. u3 u10 are 16-bit accurate analog buffers connected in the unity-gain configuration. u1 is powered from v dd and u3 u10 are powered from v dd and v ee . u3 is powered from the c module (j1-7, j1-8). a termi- nal block (tb0) has also been provided on the max1168 ev kit board for evaluating external reference mode. refer to the max1167/max1168 or max1067/ max1068 data sheets to ensure all interface timing specifications are met. the max1168 and max1168 ev kit board support dsp and 16-bit-wide data-transfer mode. jumpers ju1 and ju2 can be configured for these modes; however, the supplied ev kit windows-compatible software does not support these two modes. please refer to the max1167/max1168 or max1067/max1068 data sheets for more information. table 1. software control descriptions (continued) control description the se t vr e f b utton al l ow s the user to sp eci fy the actual r efer ence vol tag e. the eval uati on softw ar e assum es a + 4.096v r efer ence vol tag e, unl ess other w i se sp eci fi ed . to over r i d e the d efaul t + 4.096v softw ar e r efer ence val ue, m easur e the actual r efer ence vol tag e at the ter m i nal b l ock ( tb0) on the m ax 1168 e v ki t b oar d and enter the new r efer ence vol tag e, w i thout the vol t uni t. fi nal l y, p r ess the se t vr e f b utton. the e v ki t softw ar e uses the val ue typ ed i n the v r ef fi el d to tr ansl ate the d i g i tal cod e to a vol tag e. pressing the read adc button performs the conversion(s) specified by the control byte and reads back the result(s). checking the autoread checkbox performs the conversion(s) specified by the control byte and reads back the result(s) every 500ms. a blinking asterisk indicates autoread is active. the exit button closes the program table 2. dsp frame sync receive input (dspr) jumper shunt position description on* dsp mode disable ju1 off dsp mode enable (the supplied windows software does not support this mode) table 3. data bit transfer select input (dsel) jumper shunt position description 1 2 16-bit-wide data-transfer mode (the supplied windows software does not support this mode) ju2 2 3* 8-bit-wide data-transfer mode caution: do not connect an external controller to the dsel pad while a shunt is on jumper ju2. * default configuration. * default configuration.
evaluates: max1068/max1168 max1168 evaluation kit/evaluation system _______________________________________________________________________________________ 5 figure 1. max1168 evaluation software? main window
evaluates: max1068/max1168 max1168 evaluation kit/evaluation system 6 _______________________________________________________________________________________ avdd c1 0.1 f c2 0.1 f u3 5 4 3 1 max4430 7 r1 100 ? c24 100pf c32 0.22 f r9 4.7k ? r17 10 ? ain0 avdd c3 0.1 f c4 0.1 f u4 5 4 3 1 max4430 8 r2 100 ? c25 100pf c33 0.22 f r10 4.7k ? r18 10 ? ain1 vee vee max1168 avdd c5 0.1 f c6 0.1 f u5 5 4 3 1 max4430 9 r3 100 ? c26 100pf c34 0.22 f r11 4.7k ? r19 10 ? ain2 avdd c7 0.1 f c8 0.1 f u6 5 4 3 1 max4430 10 r4 100 ? c27 100pf c35 0.22 f r12 4.7k ? r20 10 ? ain3 vee vee avdd c9 0.1 f c10 0.1 f u7 5 4 3 1 max4430 11 r5 100 ? c28 100pf c36 0.22 f r13 4.7k ? r21 10 ? ain4 avdd c11 0.1 f c12 0.1 f u8 5 4 3 1 max4430 12 r6 100 ? c29 100pf c37 0.22 f r14 4.7k ? r22 10 ? ain5 vee vee avdd c13 0.1 f c14 0.1 f u9 5 4 3 1 max4430 13 r7 100 ? c30 100pf c38 0.22 f r15 4.7k ? r23 10 ? ain6 avdd c15 0.1 f c16 0.1 f u10 5 4 3 1 max4430 14 r8 100 ? c31 100pf c39 0.22 f r16 4.7k ? r24 10 ? ain7 vee vee 18 17 21 fb2 24 16 15 20 gnd vee c21 0.1 f c23 1 f tb0? tb0? terminal block j1?8 5 din 3 dout j1?6 j1?5 4 23 sclk j1?7 cs 2 5 4 1 3 a gnd y v cc de ucvdd c22 0.1 f tp1? tp1? tp1? tp1? sclk tp1? din tp1? dout cs dvdd tb1 dspx 2 desl 6 eoc 1 2 3 ju2 1 dspr ju1 avdd c20 10 f c19 10 f c18 0.1 f c17 0.1 f avdd dvdd 19 22 j1? j1? j1? j1? j1? j1? j1? j1?0 j1?9 j1?4 j1?3 j1?2 j1?1 j1?0 j1?9 j1?8 j1?7 j1?6 j1?5 j1?4 j1?3 j1?2 j1?1 j1?0 j1?9 j1?8 j1?0 j1?1 j1?2 j1?3 j1?4 j1?5 j1?6 j1?7 j1? j1? ucvdd tb0 2 x 20 right angle female connector ain0 av dd dv dd ain1 ain2 ain3 ain4 ain5 ain6 ain7 agnd agnd dgnd n.c. refcap ref dout din sclk dspx dsel dspr cs eoc u1 u2 nc7sz125 vee fb1 j1 figure 2. max1168 ev kit schematic
evaluates: max1068/max1168 max1168 evaluation kit/evaluation system _______________________________________________________________________________________ 7 figure 3. max1168 ev kit component placement guide?omponent side
evaluates: max1068/max1168 max1168 evaluation kit/evaluation system 8 _______________________________________________________________________________________ figure 4. max1168 ev kit pc board layout?omponent side
evaluates: max1068/max1168 max1168 evaluation kit/evaluation system _______________________________________________________________________________________ 9 figure 5. max1168 ev kit pc board layout?nner layer 2 (gnd)
evaluates: max1068/max1168 max1168 evaluation kit/evaluation system 10 ______________________________________________________________________________________ figure 6. max1168 ev kit pc board layout?nner layer 3 (vdd)
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 11 ? 2003 maxim integrated products printed usa is a registered trademark of maxim integrated products. evaluates: max1068/max1168 max1168 evaluation kit/evaluation system figure 7. max1168 ev kit pc board layout?older side

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