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1 description ltc 2000, ltc 2000a 16-, 14-, 11-bit, 2.5gsps to 2.7gsps dacs demonstration circuit 2085 supports the lt c ? 2000 and LTC2000a , a high speed, high dynamic range family of dacs. it was specially designed for applications that re - quire differential dc coupled outputs. dc2085 supports the complete family of the LTC2000 including 16, 14 and 11 bit parts. for all the variations see table 1. l , lt, ltc, ltm, linear technology and the linear logo are registered trademarks of analog devices, inc. all other trademarks are the property of their respective owners. performance summary the circuitry on the analog outputs is optimized for analog frequencies from dc-1.08ghz. design files for this circuit board are available at http://www .linear.com/demo/dc2085 specifications are at t a = 25c parameter conditions min typ max units supply voltage C dc2085 this supply must provide up to 800ma 4.8 5.0 5.2 v sampling frequency (sample clock frequency) 300 2500 or 2700 mhz sample clock level (single-ended) use a 50 source 0 15 dbm lvds inputs differential input voltage range common mode voltage range 0.2 0.4 0.6 1.8 v v table 1. dc2085 variants dc2085 variants part number resolution maximum sample rate output frequency dc2085a-a LTC2000-16 16-bit 2.5gsps dc-1000mhz dc2085a-b LTC2000-14 14-bit 2.5gsps dc-1000mhz dc2085a-c LTC2000-11 11-bit 2.5gsps dc-1000mhz dc2085a-d LTC2000a-16 16-bit 2.7gsps dc-1080mhz dc2085a-e LTC2000a-14 14-bit 2.7gsps dc-1080mhz dc2085a-f LTC2000a-11 11-bit 2.7gsps dc-1080mhz dc2085afb demo manual dc 2085
2 quick start procedure dc2085 is easy to set up to evaluate the performance of the LTC2000. refer to figure 1 for proper measurement equip - ment set - up and follow the procedure below: setup if the altera stratix iv gx fpga development kit was not supplied with the dc2085 demonstration circuit, follow the altera stratix iv demo manual to install the required software and for connecting the altera stratix iv to the dc2085 and to a pc. figure 1. dc2085 setup (zoom for details) single-ended sample clock input connect usb to pc running ltdacgen software jumpers shown in their default positions the dc2085 connects to the altera stratix iv evaluation board via hsmc connectors 5v differential outputs nominal outputs look like 50 per side to drive an external balun, or combiner + dc2085afb demo manual dc 2085
3 quick start procedure hardware setup smas j2 & j3: differential trigger input. apply a signal to j2 from a 50 driver. absorptive filters are required for data sheet performance. use j2 and j3 if the trigger is a differential signal. j4: sample clock input. apply a clock signal to this sma connector from a 50 driver. a 0 dbm clock source should be sufficient, but for best phase noise and jitter performance, use the highest possible amplitude and slew rate, up to 15dbm. j5 & j6: differential output signals. these smas provide access to the differential outputs of the dac. the output impedance is designed to be 50 at each sma, or 100 differential. connect an external balun or combiner to these pins to drive a single-ended spectrum analyzer. linear technology has various coupon boards for specific frequencies and applications. more information is available at www.linear.com. j8: sync. this sma is to provide access to the sync pin of the lt8614. it is not used in normal use. turrets +5 v: positive input voltage for the dac and digital circuits . this voltage feeds a series of regulators that supply the proper voltages for the dac. the voltage range for this turret is 4.8v to 5.2v . note : for close- in phase noise plots, driving this voltage is not ideal. there is a known 20khz noise hump in the spectrum that is generated by the regulators. for the best phase noise performance, back drive the onboard regulators with the provided turrets from a low noise supply. gnd: ground connection. this demo board has only a single ground plane. this turret should be tied to the gnd terminal of the power supply being used. svdd3v0: optional 3.0 v input. this pin is connected directly to the svdd pin of the dac. it requires a supply that can deliver up to 100 ma. driving this pin will shut down the onboard regulator. avdd3v3: optional 3.3 v input. this pin is connected directly to the avdd3v3 pin of the dac. it requires a supply that can deliver up to 200 ma. driving this pin will shut down the onboard regulator. dvdd3v3: optional 3.3 v input. this pin is connected directly to the dvdd3v3 pin of the dac. it requires a supply that can deliver up to 50 ma. driving this pin will shut down the onboard regulator. avdd1v8: optional 1.8 v input. this pin is connected directly to the avdd1v8 pin of the dac. it requires a supply that can deliver up to 1 a. driving this pin will shut down the onboard regulator. dvdd3v3: optional 1.8 v input. this pin is connected directly to the dvdd1v8 pin of the dac. it requires a supply that can deliver up to 500 ma. driving this pin will shut down the onboard regulator. vp1: this is a test point that is at the output of the on - board switching regulator. it is meant for test purposes. it can also be driven to 2.5 v to shut down the output of the switching regulator. tstp & tstn: these pins are tied directly to the tstp and tstn pins of the dac. they can be used to measure the internal temperature and timing of the lvds inputs. fsadj: this is an optional pin that is tied directly to the fsadj pin of the dac. it can be used to set the full-scale output current of the dac. in normal operation this pin is tied to gnd through 500 to set a current of 40 ma at the output. refio: this pin is tied directly to the refio pin of the dac and is used to set the reference voltage for the dac. normally it is internally set to 1.25 v but can be overdriven with an external voltage from 1.1v to 1.4v. jumpers the dc2085 demonstration circuit should have the fol - lowing jumper settings as default positions. jp1: pd. in the run position this pin results in normal operation of the dac. in the shdn position the dac is powered down. (default: run or up) jp2: spi and jtag. this jumper selects how the fpga is programmed. in the spi position the fpga is programmed from the onboard ftdi chip and the ltdacgen software. in dc2085afb demo manual dc 2085
4 the jtag position the j9 is used with a jtag programmer to program the fpga. (default: spi or down) connectors j1: dc590. this is an optional header that can be used to program the dac with the dc590. (default: removed) j9: jtag. this is an optional header that can be used to program the fpga through a jtag programmer . (default: removed) j7: usb. connect a usb cable from j7 to a computer with the ltdacgen software installed. j10 & j11: hsmc connectors. these connectors are designed to connect to the altera stratix iv development board. all of the communication between the fpga and the dac is routed through these connectors. applying power and signals to the dc2085 demonstration circuit if a stratix iv demo board is used to supply data to the dc2085, the two boards should first be bolted together and a proper connection should be made. if linear tech - nology provided the stratix iv board the proper bit file is already installed in flash memory and will begin to operate when the board is powered on. if an unprogrammed fpga board is used, refer to the appropriate documentation on how to program it. power should be applied to the system in this order: 1. connect the altera board to the provided power supply. 2. connect the usb cable to j7. 3. apply a clock to j4. 4. connect any optional output board to j5 and j6. 5. turn on the voltage to the altera board. 6. connect the 5 v from a bench supply to the +5 v turret on the dc2085. 7. open the l tdacgen software and hit connect. ltdacgen should report back that it is connected to the fpga. see figure 2: quick start procedure figure 2. ltdacgen connected to fpga dc2085afb demo manual dc 2085
5 quick start procedure analog output network the analog output network of the dc2085 has been designed to maximize the performance of the LTC2000. the LTC2000 drives two 50 resistors on each side to minimize the impedance it sees. this maximizes the sfdr the dac is able to produce. if a larger signal swing is required this impedance can be increased, but the sfdr might degrade. the output also has a pi network of 50 resistors to pad the output impedance of the board up to 50 per side. this allows the demo board to drive a 50 analyzer through a balun or other combiner. linear technology has various coupon boards for specific frequencies and applications. more information is available at www.linear.com. sample clock the sample clock to the dc2085 demonstration circuit board is marked j4. as a default it is a single-ended 50 input port. there is an onboard balun that does a single- ended to differential translation. for the best noise performance, the sample input must be driven with a very low jitter signal generator source. the amplitude should be as large as possible up to 1.8 v or 9dbm. software the software for the dc2085, ltdacgen is available at www.linear.com free of charge. it simplifies the creation of complex waveforms and loading them into the fpga to test the dc2085. for more information about how to use the ltdacgen software, refer to the help files that come with the software. results after everything is set up and the software is con - nected to the dac demo system, a sine wave can be added to the output waveform. the default frequency is 399.932861328mhz (figure 3). by clicking update fpga, the data is sent to the fpga and is then used to program the dac. a spectrum analyzer can then be used to view the results (figure 4). figure 3. default frequency dc2085afb demo manual dc 2085
6 figure 4. dc2085 results. close-in ( top ) and wideband (bottom) quick start procedure dc2085afb demo manual dc 2085
7 parts list item qty reference part description manufacturer/ part number required circuit components 1 13 c1, c25, c26, c29, c31, c32, c33, c34, c35, c36, c37, c71, c72 cap., x7r, 0.1f, 16v 10% 0402 avx , 0402yc104 kat 2a 2 4 c2, c3, c8, c19 cap., npo, 0.01f, 25v 5% 0603 tdk, c1608c0g1h103j 3 9 c4, c6, c9, c11, c14, c18, c67, c68, c69 cap., x7r, 1f, 16v 10% 0603 avx , 0603yc105 kat 2a 4 5 c5, c7, c10, c12, c15 cap., tant., 47f, 16v 10% 7343 avx , tajd476k016rnj 5 4 c13, c16, c27, c28 cap., x5r, 4.7f, 16v 20% 1206 tdk, c3216x5r1c475m 6 2 c17, c40 cap., x5r, 10f, 10v 20% 0603 avx , 0603zd106ma2t 7 1 c20 cap., c0g, 4.7pf, 50v 0.25pf 0603 avx , 06035a4r7 cat 2a 8 2 c21, c24 cap., x7r, 0.1f, 16v 10% 0603 tdk, c1608x7r1c104k 9 1 c22 cap., x7r, 1f, 25v 10% 0603 tdk, c1608x7r1e105k 10 2 c23, c70 cap., x7r, 47f, 10v 10% 1210 murata, grm32er71a476ke15l 11 1 c30 cap., x5r, 3.3f, 16v 10% 0603 tdk, c1608x5r1c335k 12 2 c38, c39 cap., cog, 27pf, 50v 5% 0402 tdk, c1005c0g1h270j 13 2 c41, c42 cap., cog, 100pf, 25v 5% 0201 tdk, c0603c0g1e101j 14 1 c43 cap., x5r, 0.01f, 16v 10% 0402 mura t a, grm155r61c103ka01d 15 1 c44 cap., x7r, 47nf, 25v 10% 0402 murata, grm155r71e473ka88d 16 9 c45, c48, c49, c53, c54, c58, c61, c62, c64 cap., x5r, 100f, 6.3v 20% 1206 tdk, c3216x5r0j107m 17 10 c46, c50, c51, c52, c55, c56, c57, c59, c60, c63 cap., x7s, 2.2f, 4v 20% 0306 murata, lll185c70g225me01l 18 1 c47 cap., cog, 10pf, 25v 5% 0201 murata, grm0335c1e100ja01d 19 0 c65 cap., opt , 0402 option 20 1 c66 cap., np0, 1pf, 25v .25pf 0402 avx , 04023a1r0 cat 2a 21 2 c73, c74 cap., x7r, 4.7f, 50v 10% 1206 murata, grm31cr71h475ka12l 22 1 c75 cap., x7r, 10f, 50v 10% 1210 murata, grm32er71h106ka12l 23 2 c76, c77 cap., x5r, 1f, 50v 10% 0603 murata, grm188r61h105kaald 24 1 d1 diode, tvs , 70v,sma diodes inc./ zetex, smat70a-13-f 25 1 d2 diode, tvs , 24v,sma diodes inc./ zetex, smaj24a-13-f 26 1 d3 led, red, waterclear, 0805 w rth , 150080rs75000 27 10 e1, e2, e3, e5Ce11 test point, turret, .061, pbf mill-max, 2308-2-00-80-00-00-07-0 28 2 e4, e12 test point, turret, .094, pbf mill-max, 2501-2-00-80-00-00-07-0 29 2 jp1, jp2 header, 3 pin, .079 sullins, nrpn031paen-rc 30 1 j1 header, 27 dual row molex 87831-1420 31 3 j2, j3, j8 con., sma jack, straight, thru-hole amphenol connex, 132134 32 1 j4 con., sma pcb top mount aep, 9650-1113-005 33 2 j5, j6 con., sma 50 edge-launch emerson, 142-0701-851 34 1 j7 connector, usb type b, right angle pcb mount fci, 61729-0010blf 35 1 j9 header, 2x5, 0.100 samtec, tsw-105-07-l-d 36 2 j10, j11 connector, hsmc samtec, asp-122952-01 dc2085afb demo manual dc 2085
8 parts list item qty reference part description manufacturer/ part number 37 6 l1, l2, l3, l4, l6, l7 ferrite bead, 33 at 100mhz, 1206 murata, blm31pg330sn1l 38 1 l5 inductor, 2.2h, 20% high current, smt vishay, ihlp2020bzer2r2m11 39 1 l8 inductor, ceramic chip, 1nh, 5%, 0402 coilcraft, 0402cs-1n0xjlu 40 1 l9 ferrite bead, 30 at 100mhz, 0805 tdk, mpz2012s300a 41 1 l10 inductor, 6.8h, 20% high current, smt vishay, ihlp2020bzer6r8m11 42 2 mtg5, mtg6 standoff, nylon 0.5" keystone, 8833 (snap on) 43 2 q1, q2 transistor, n-ch. power mosfet, soic 8l fairchild, fds8870 44 6 r1, r2, r3, r13, r17, r30 res., chip, 1k, 1/16w, 5% 0402 vishay, crcw04021k00jned 45 1 r4 res., chip, 4.7k, 1/16w, 5% 0402 yageo, rc0402jr-074k7l 46 4 r5, r14Cr16 res., chip, 10k, 1/16w, 5% 0402 yageo, rc0402jr-0710kl 47 2 r6, r8 res., chip, 2k, 1/16w, 5% 0402 vishay, crcw04022k00jned 48 0 r7, r10, r23, r24, r25, r27, r28, r36, r37, r38, r39, r43, r62, r63 res., chip, opt , 0402 option 49 1 r9 res., chip, 39, 1/16w, 1% 0402 vishay, crcw040239r0fked 50 1 r11 res., chip, 0 jumper, 1/16w, 0402 vishay, crcw04020000z0ed 51 1 r12 res., chip, 12k, 1/16w, 5% 0402 vishay, crcw040212k0jned 52 1 r18 res., chip, 2.2k, 1/16w, 5% 0402 vishay, crcw04022k20jned 53 2 r19, r20 res., chip, 3.24k, 1/16w, 1% 0402 vishay, crcw04023k24fked 54 1 r21 res., chip, 1k , 1/16w, 1% 0402 y ageo, rc0402fr-071kl 55 1 r22 res., chip, 7.15k, 1/16w, 1% 0402 vishay, crcw04027k15fked 56 2 r26, r29 res., chip, 49.9, 1/6w, 1% 0201 vishay, crcw020149r9fned 57 7 r31-r35, r41, r42 res., chip, 10, 1/16w, 1% 0402 vishay, crcw040210r0fked 58 10 r40, r44, r46, r47, r48, r57, r58, r59, r60, r61 res., chip, 50, high freq., 1/20w, 0.1% 0402 vishay, fc0402e50r0bst1 59 1 r45 res., chip, 499, 1/16w, 1% 0402 vishay, crcw0402499rfked 60 1 r49 res., chip, 41.2k, 1/10w, 1% 0603 vishay, crcw060341k2fkea 61 1 r50 res., chip, 309k, 1/10w, 1% 0603 vishay, crcw0603309kfkea 62 1 r51 res., chip, 243k, 1/10w, 1% 0603 vishay, crcw0603243kfkea 63 1 r52 res., chip, 50, 1/8w, 5% 0603 vishay, fc0603e50r0jst1 64 1 r53 res., chip, 560, 1/10w, 5% 0603 vishay, crcw0603560rjnea 65 1 r54 res., chip, 10k, 1/10w, 1% 0603 vishay, crcw060310k0fkea 66 2 r55, r56 res., chip, 20, 1/16w, 1% 0402 vishay, crcw040220r0fked 67 1 t1 transformer, balun anaren, b0430j50100ahf 68 1 u2 ic, usb to multipurpose uart/fifo, tqfp ftdi, ft 2232hl 69 1 u3 ic, quad mux/demux, tssop-16 fairchild, fst3257mtcx 70 1 u4 ic, eeprom 1kbit 3mhz, 8tssop microchip, 93lc46c-i/st 71 1 u5 ic, micropower regulator, so-8 linear technology, lt1763cs8-3#pbf 72 2 u6, u7 ic, micropower regulator, so-8 linear technology, lt1763cs8-3.3#pbf 73 1 u8 ic, buck regulator, qfn linear technology, lt8614iudc#pbf 74 1 u9 ic , voltage reference, msop linear technology, ltc6655chms8-2.048#pbf dc2085afb demo manual dc 2085
9 parts list item qty reference part description manufacturer/ part number 75 2 u10, u11 i.c., low dropout regulator, 33mm, dfn linear technology, lt3080edd#pbf 76 1 u12 i.c., 80v ideal diode, dfn-6l linear technology, ltc4359hdcb-#trpbf 77 2 xjp1, xjp2 shunt, 2mm samtec, 2sn-bk-g 78 1 y1 crystal, 12.0 mhz, smt abracon, abmm2-12.000mhz-e2-t dc2085a-a required circuit components 1 1 general bom dc2085a 2 1 u1 ic, 16-bit 2.5gsps dac linear technology, LTC2000iy-16 dc2085a-b required circuit components 1 1 general bom dc2085a 2 1 u1 ic, 14-bit 2.5gsps dac linear technology, LTC2000iy-14 dc2085a-c required circuit components 1 1 general bom dc2085a 2 1 u1 ic, 11-bit 2.5gsps dac linear technology, LTC2000iy-11 dc2085a-d required circuit components 1 1 general bom dc2085a 2 1 u1 ic, 16-bit 2.7gsps dac linear technology, LTC2000aiy-16 dc2085a-e required circuit components 1 1 general bom dc2085a 2 1 u1 ic, 14-bit 2.7gsps dac linear technology, LTC2000aiy-14 dc2085a-f required circuit components 1 1 general bom dc2085a 2 1 u1 ic, 11-bit 2.7gsps dac linear technology, LTC2000aiy-11 dc2085afb demo manual dc 2085
10 information furnished by linear technology corporation is believed to be accurate and reliable. however, no responsibility is assumed for its use. linear technology corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. figure 5. dc2085 demo circuit schematic (sheet 1) schematic diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a 01/30/2014 01/30/2014 LTC2000 high speed dac demo circuit 2085a u1* tstn tstp (from page 4) (t0 page 4) to page 4 (to page 4) LTC2000-x family (t0 page 4) assy LTC2000iy-16 assembly table u1 LTC2000iy-14 LTC2000iy-11 * -b -c -a notes: 1. all resistors are size 0402, u.o.n. 2. refer to page 4 for LTC2000 power connections. digital inputs [da0..da15] and [db0..db15] from page 4 fsadj refio trig n trig p ioutpb ioutnb ck pd run shdn dc590 LTC2000aiy-16 LTC2000aiy-14 LTC2000aiy-11 -e -f -d svdd3v0 svdd3v0 svdd3v0 dckop dckon dckin dckip sck_alt cs_alt cs_ftdi sck_ftdi sdi_alt sdo_alt pd_alt sdi_ftdi sdo_ftdi pd_alt dan15 dap15 dap14 dap13 dap12 dap11 dap10 dap9 dap8 dap7 dap6 dap5 dap4 dap3 dap2 dap1 dap0 dan14 dan13 dan12 dan11 dan10 dan9 dan8 dan7 dan6 dan5 dan4 dan3 dan2 dan1 dan0 dbn0 dbn1 dbn2 dbn3 dbn4 dbn5 dbn6 dbn7 dbn8 dbn9 dbn10 dbn11 dbn12 dbn13 dbn14 dbn15 dbp0 dbp1 dbp2 dbp3 dbp4 dbp5 dbp6 dbp7 dbp8 dbp9 dbp10 dbp11 dbp12 dbp13 dbp14 dbp15 trigger_n trigger_p size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 1 4 n/a m. hawkins c. mayott size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 1 4 n/a m. hawkins c. mayott size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 1 4 n/a m. hawkins c. mayott revision history description date approved eco rev c. mayott production 3 - revision history description date approved eco rev c. mayott production 3 - revision history description date approved eco rev c. mayott production 3 - r4110 r61 50 0402 r33 10 r31 10 c41 100pf cog 0201 r4210 c42 100pf cog 0201 r62 opt 0402 r46 50 0402 r48 50 0402 r59 50 0402 j2 1 r40 50 0402 j1 vunreg 1 gnd 3 miso 5 mosi/sda 7 eesda 9 eescl 11 gnd 13 vccio 2 sck/scl 4 cs 6 gnd 8 eevcc 10 eegnd 12 gpio 14 r23 opt 0402 j6 1 c40 10uf r24 opt 0402 c47 10pf 0201 cog gnd gnd in t1 anaren xinger 1 3 2 4 6 5 r38 opt r26 49.9 0201 1% r32 10 r35 10 e11 r37 opt r29 49.9 0201 1% c65 opt 0402 l8 1nh 1 2 r63 opt 0402 r60 50 0402 r28 opt 0402 r27 opt 0402 r47 50 0402 r58 50 0402 e9 r34 10 j3 1 r25 opt 0402 e10 c66 1pf np0 dap15 a8 dan15 a7 dap14 b8 dan14 b7 dap13 c8 dan13 c7 dap12 d8 dan12 d7 dap11 e8 dan11 e7 dap10 f8 dan10 f7 dap9 g8 dan9 g7 dap8 h8 dan8 h7 dap7 k8 dan7 k7 dap6 l8 dan6 l7 dap5 m8 dan5 m7 dap4 n8 dan4 n7 dap3 p8 dan3 p7 dap2 q8 dan2 q7 dap1 r8 dan1 r7 dap0 s8 dan0 s7 dbp15 a10 dbn15 a9 dbp14 b10 dbn14 b9 dbp13 c10 dbn13 c9 dbp12 d10 dbn12 d9 dbp11 e10 dbn11 e9 dbp10 f10 dbn10 f9 dbp9 g10 dbn9 g9 dbp8 h10 dbn8 h9 dbp7 k10 dbn7 k9 dbp6 l10 dbn6 l9 dbp5 m10 dbn5 m9 dbp4 n10 dbn4 n9 dbp3 p10 dbn3 p9 dbp2 q10 dbn2 q9 dbp1 r10 dbn1 r9 dbp0 s10 dbn0 s9 dckip j10 dckin j9 ckp a3 ckn a2 ioutp h1 ioutn j1 sck s5 sd0 s3 sdi s4 pd s1 cs s2 refio m1 fsadj m2 dckon j7 dckop j8 tstp r4 tstn r3 svdd s6 j4 1 j5 1 r43 opt 0402 jp1 1 3 2 r57 50 0402 r39 opt e8 c43 0.01uf 0402 x5r r44 50 0402 r36 opt r45 499 dc2085afb demo manual dc 2085
11 5 5 4 4 3 3 2 2 1 1 d d c c b b a a jtag spi LTC2000 high speed dac demo circuit 2085a 01/30/2014 sck_if sdi_if sdo_if cs_if jtag usb LTC2000-x family vbus vbus usbd- usbd+ tck tdo tdi tms tck tdo tms tdi svdd3v0 svdd3v0 svdd3v0 svdd3v0 svdd3v0 svdd3v0 svdd3v0 svdd3v0 ftdi_1v8 ftdi_1v8 ftdi_1v8 svdd3v0 svdd3v0 svdd3v0 fifo_data_in0 fifo_data_in1 fifo_data_in2 fifo_data_in3 fifo_data_in4 fifo_data_in5 fifo_data_in6 fifo_data_in7 bc0 bc1 bc2 bc3 bc4 bc5 bc6 rxen txen rdn wm siwua_ctrl sysclk ac7 sck_ftdi sdi_ftdi sdo_ftdi cs_ftdi bd4 bd5 bd6 bd7 oen_ctrl bd3 bd2 bd1 bd0 bc7 data pwrenn reset# suspend# clk cs size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 2 4 n/a m. hawkins c. mayott size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 2 4 n/a m. hawkins c. mayott size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 2 4 n/a m. hawkins c. mayott r12 12k r12 12k r18 2.2k r18 2.2k j7 j7 1 2 3 4 5 6 r3 1k r3 1k l7 ferrite bead, 33 ohms l7 ferrite bead, 33 ohms c26 0.1uf c26 0.1uf jp2 jp2 1 3 2 r16 10k r16 10k r5 10k r5 10k l6 ferrite bead, 33 ohms l6 ferrite bead, 33 ohms u2 ft2232hl u2 ft2232hl gnd 1 gnd 5 gnd 11 gnd 15 gnd 25 gnd 35 gnd 47 gnd 51 agnd 10 test 13 osco 3 osci 2 eedata 61 eeclk 62 eecs 63 reset# 14 ref 6 dp 8 dm 7 vregout 49 vregin 50 vphy 4 vpll 9 vcore 12 vcore 37 vcore 64 vccio 20 vccio 31 vccio 42 vccio 56 adbus0 16 adbus1 17 adbus2 18 adbus3 19 adbus4 21 adbus5 22 adbus6 23 adbus7 24 acbus0 26 acbus1 27 acbus2 28 acbus3 29 acbus4 30 acbus5 32 acbus6 33 acbus7 34 bdbus0 38 bdbus1 39 bdbus2 40 bdbus3 41 bdbus4 43 bdbus5 44 bdbus6 45 bdbus7 46 bcbus0 48 bcbus1 52 bcbus2 53 bcbus3 54 bcbus4 55 bcbus5 57 bcbus6 58 bcbus7 59 pwren# 60 suspend# 36 r9 39 r9 39 u3 fst3257mtcx u3 fst3257mtcx 1b1 2 1b2 3 1a 4 2a 7 2b1 5 2b2 6 3a 9 3b1 11 3b2 10 4b1 14 4b2 13 4a 12 s 1 gnd 8 vcc 16 oe 15 r15 10k r15 10k r13 1k r13 1k c28 4.7uf c28 4.7uf r1 1k r1 1k r6 2k r6 2k r8 2k r8 2k c29 0.1uf c29 0.1uf c1 0.1uf c1 0.1uf u4 93lc46c-i/st u4 93lc46c-i/st org 6 nc 7 clk 2 vss 5 di 3 cs 1 do 4 vcc 8 c38 27pf npo c38 27pf npo c30 3.3uf c30 3.3uf r17 1k r17 1k y1 12.0 mhz y1 12.0 mhz 1 3 2 4 c39 27pf npo c39 27pf npo c25 0.1uf c25 0.1uf r14 10k r14 10k c27 4.7uf c27 4.7uf c34 0.1uf c34 0.1uf r4 4.7k r4 4.7k r2 1k r2 1k c31 0.1uf c31 0.1uf c35 0.1uf c35 0.1uf c32 0.1uf c32 0.1uf c36 0.1uf c36 0.1uf r7 opt r7 opt r10 opt r10 opt c37 0.1uf c37 0.1uf j9 j9 1 3 5 6 4 2 7 9 8 10 r11 0 ohms r11 0 ohms c33 0.1uf c33 0.1uf figure 6. dc2085 demo circuit schematic (sheet 2) schematic diagram dc2085afb demo manual dc 2085
12 5 5 4 4 3 3 2 2 1 1 d d c c b b a a 01/30/2014 demo circuit 2085a LTC2000 high speed dac svdd3v0 avdd3v3 dvdd3v3 +5v avdd1v8 dvdd1v8 vp1 gnd sync LTC2000-x family 2.2v power fault vp1 svdd3v0 avdd3v3 dvdd3v3 +5v +5v +5v avdd1v8 dvdd1v8 svdd3v0 size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 3 4 n/a m. hawkins c. mayott size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 3 4 n/a m. hawkins c. mayott size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 3 4 n/a m. hawkins c. mayott c44 47nf 0402 25v c44 47nf 0402 25v r19 3.24k r19 3.24k r54 10k r54 10k + c5 47uf + c5 47uf c3 0.01uf c3 0.01uf l3 ferrite bead, 33 ohms l3 ferrite bead, 33 ohms c71 0.1uf c71 0.1uf c77 1.0uf c77 1.0uf q2 fds8870 q2 fds8870 2 1 3 4 5 6 7 8 u6 lt1763cs8-3.3 u6 lt1763cs8-3.3 out 1 sen 2 gnd 3 byp 4 shdn 5 gnd 6 gnd 7 in 8 + c7 47uf + c7 47uf c8 0.01uf c8 0.01uf c68 1.0uf c68 1.0uf c24 0.1uf c24 0.1uf c20 4.7pf c20 4.7pf u9 ltc6655chms8-2.048 u9 ltc6655chms8-2.048 vin 2 shdn 1 gnd 3 outf 7 gnd 8 gnd 4 outs 6 gnd 5 r22 7.15k r22 7.15k c73 4.7uf 1206 c73 4.7uf 1206 d2 smaj24a d2 smaj24a 2 1 u10 lt3080edd u10 lt3080edd vin 7 vctrl 5 vout 3 vin 8 vout 2 vout 1 pad 9 set 4 c75 10uf 1210 c75 10uf 1210 l2 ferrite bead, 33 ohms l2 ferrite bead, 33 ohms r30 1k 0402 r30 1k 0402 u7 lt1763cs8-3.3 u7 lt1763cs8-3.3 out 1 sen 2 gnd 3 byp 4 shdn 5 gnd 6 gnd 7 in 8 j8 j8 1 d1 smat70a d1 smat70a 2 1 + c10 47uf + c10 47uf u8 lt8614 u8 lt8614 vin1 4 gnd1 6 pg 19 sync/mode 17 tr/ss 16 intvcc 2 rt 15 gnd1 7 fb 20 bias 1 sw 22 sw 21 bst 3 gnd2 11 vin2 13 en/uv 14 gnd2 10 gnd 18 sw 9 sw 8 r53 560 r53 560 c67 1.0uf c67 1.0uf r20 3.24k r20 3.24k e6 e6 e7 e7 e2 e2 c72 0.1uf c72 0.1uf r55 20 r55 20 l5 2.2uh l5 2.2uh 1 2 e5 e5 e3 e3 + c15 47uf + c15 47uf e1 e1 c70 47uf 1210 c70 47uf 1210 c76 1.0uf c76 1.0uf c13 4.7uf c13 4.7uf c19 0.01uf c19 0.01uf r21 1k r21 1k q1 fds8870 q1 fds8870 2 1 3 4 5 6 7 8 c11 1.0uf c11 1.0uf r50 309k r50 309k c17 10uf c17 10uf l10 6.8uh l10 6.8uh 1 2 l1 ferrite bead, 33 ohms l1 ferrite bead, 33 ohms l4 ferrite bead, 33 ohms l4 ferrite bead, 33 ohms c6 1.0uf c6 1.0uf c18 1.0uf c18 1.0uf c14 1.0uf c14 1.0uf c21 0.1uf c21 0.1uf c4 1.0uf c4 1.0uf c74 4.7uf 1206 c74 4.7uf 1206 r51 243k r51 243k r56 20 r56 20 e12 e12 ltc4359hdcb u12 ltc4359hdcb u12 shdn 5 in 4 source 3 gate 2 out 1 vss 6 pad 7 c2 0.01uf c2 0.01uf r49 41.2k r49 41.2k l9 ferrite bead l9 ferrite bead d3 red d3 red 2 1 u11 lt3080edd u11 lt3080edd vin 7 vctrl 5 vout 3 vin 8 vout 2 vout 1 pad 9 set 4 e4 e4 c23 47uf 1210 c23 47uf 1210 + c12 47uf + c12 47uf c9 1.0uf c9 1.0uf c22 1.0uf c22 1.0uf u5 lt1763cs8-3 u5 lt1763cs8-3 out 1 sen 2 gnd 3 byp 4 shdn 5 gnd 6 gnd 7 in 8 r52 50 r52 50 c69 1.0uf c69 1.0uf c16 4.7uf c16 4.7uf figure 7. dc2085 demo circuit schematic (sheet 3) schematic diagram dc2085afb demo manual dc 2085
13 5 5 4 4 3 3 2 2 1 1 d d c c b b a a hsmc connectors - mezzanine side 01/30/2014 LTC2000 high speed dac demo circuit 2085a net connections for LTC2000 power pins to pcb power nets LTC2000 power connections u1 LTC2000 power bypass capacitors LTC2000-x family avdd33 dvdd18 dvdd33 avdd18 dvdd1v8 avdd3v3 dvdd3v3 avdd1v8 svdd3v0 avdd1v8 dvdd1v8 avdd3v3 dvdd3v3 dckop dckon dan15 dbn15 dbp15 dan14 dbn14 dbp14 dan13 dbn13 dbp13 dan12 dbn12 dbp12 dan11 dbp11 dbn11 dap10 dan10 dbp10 dbn10 dap9 dan9 dbp9 dbn9 dap8 dan8 dbp8 dbn8 sdi_alt sck_alt sdo_alt cs_alt bd0 bd1 dan7 dap7 dbn7 dbp7 dan6 dap6 dbn6 dbp6 dan5 dap5 dbn5 dbp5 dan4 dap4 dbn4 dbp4 dap3 dan3 dbp3 dbn3 dap2 dan2 dbp2 dbn2 dap1 dan1 dbp1 dbn1 dap0 dan0 pd_alt bd2 bd3 bd6 bd4 bc0 bd5 bc2 bd7 bc4 bc1 bc5 bc3 bc6 bc7 pwrenn data dckip dckin trigger_p trigger_n dbp0 dbn0 dap11 dap12 dap13 dap14 dap15 reset# fifo_data_in0 fifo_data_in2 fifo_data_in1 fifo_data_in3 fifo_data_in5 fifo_data_in4 fifo_data_in7 fifo_data_in6 txen oen_ctrl wm siwua_ctrl rxen rdn suspend# sysclk ac7 clk cs size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering f or assistance. th is circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 4 4 n/a m. hawkins c. mayott size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering f or assistance. th is circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 4 4 n/a m. hawkins c. mayott size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering f or assistance. th is circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 3 4 4 n/a m. hawkins c. mayott c64 100uf c64 100uf c55 2.2uf c55 2.2uf c48 100uf c48 100uf c56 2.2uf c56 2.2uf c58 100uf c58 100uf gnd gnd gnd gnd bank 2 j10b asp-122952-01 gnd gnd gnd gnd bank 2 j10b asp-122952-01 d0 41 d1 42 d2 43 d3 44 3v3 45 12v 46 lvds_txp0 47 lvds_rxp0 48 lvds_txn0 49 lvds_rxn0 50 3v3 51 12v 52 lvds_txp1 53 lvds_rxp1 54 lvds_txn1 55 lvds_rxn1 56 3v3 57 12v 58 lvds_txp2 59 lvds_rxp2 60 lvds_txn2 61 lvds_rxn2 62 3v3 63 12v 64 lvds_txp3 65 lvds_rxp3 66 lvds_txn3 67 lvds_rxn3 68 3v3 69 12v 70 lvds_txp4 71 lvds_rxp4 72 lvds_txn4 73 lvds_rxn4 74 3v3 75 12v 76 lvds_txp5 77 lvds_rxp5 78 lvds_txn5 79 lvds_rxn5 80 3v3 81 12v 82 lvds_txp6 83 lvds_rxp6 84 lvds_txn6 85 lvds_rxn6 86 3v3 87 12v 88 lvds_txp7 89 lvds_rxp7 90 lvds_txn7 91 lvds_rxn7 92 3v3 93 12v 94 clkout1p 95 clkin1p 96 clkout1n 97 clkin1n 98 3v3 99 gnd 165 gnd 166 gnd 167 gnd 168 12v 100 c50 2.2uf c50 2.2uf gnd gnd gnd gnd bank 3 j10c asp-122952-01 gnd gnd gnd gnd bank 3 j10c asp-122952-01 lvds_txp8 101 gnd 169 lvds_rxp8 102 lvds_txn8 103 lvds_rxn8 104 3v3 105 12v 106 lvds_txp9 107 lvds_rxp9 108 lvds_txn9 109 lvds_rxn9 110 3v3 111 12v 112 lvds_txp10 113 lvds_rxp10 114 lvds_txn10 115 lvds_rxn10 116 3v3 117 12v 118 lvds_txp11 119 lvds_rxp11 120 lvds_txn11 121 lvds_rxn11 122 3v3 123 12v 124 lvds_txp12 125 lvds_rxp12 126 lvds_txn12 127 lvds_rxn12 128 3v3 129 12v 130 lvds_txp13 131 lvds_rxp13 132 lvds_txn13 133 lvds_rxn13 134 3v3 135 12v 136 lvds_txp14 137 lvds_rxp14 138 lvds_txn14 139 lvds_rxn14 140 3v3 141 12v 142 lvds_txp15 143 lvds_rxp15 144 lvds_txn15 145 lvds_rxn15 146 3v3 147 12v 148 lvds_txp16 149 lvds_rxp16 150 lvds_txn16 151 lvds_rxn16 152 3v3 153 12v 154 clkout2p 155 clkin2p 156 clkout2n 157 clkin2n 158 3v3 159 12v 160 gnd 170 gnd 171 gnd 172 c57 2.2uf c57 2.2uf c51 2.2uf c51 2.2uf c52 2.2uf c52 2.2uf c59 2.2uf c59 2.2uf gnd gnd gnd gnd bank 1 j11a asp-122952-01 gnd gnd gnd gnd bank 1 j11a asp-122952-01 xcvr_txp7 1 xcvr_rxp7 2 xcvr_txn7 3 xcvr_rxn7 4 xcvr_txp6 5 xcvr_rxp6 6 xcvr_txn6 7 xcvr_rxn6 8 xcvr_txp5 9 xcvr_rxp5 10 xcvr_txn5 11 xcvr_rxn5 12 xcvr_txp4 13 xcvr_rxp4 14 xcvr_txn4 15 xcvr_rxn4 16 xcvr_txp3 17 xcvr_rxp3 18 xcvr_txn3 19 xcvr_rxn3 20 xcvr_txp2 21 xcvr_rxp2 22 xcvr_txn2 23 xcvr_rxn2 24 xcvr_txp1 25 xcvr_rxp1 26 xcvr_txn1 27 xcvr_rxn1 28 xcvr_txp0 29 xcvr_rxpo 30 xcvr_txn0 31 xcvr_rxn0 32 sda 33 scl 34 jtag_tck 35 jtag_tms 36 jtag_tdo 37 jtag_tdi 38 clkout0 39 clkin0 40 gnd 161 gnd 162 gnd 163 gnd 164 c60 2.2uf c60 2.2uf c45 100uf c45 100uf c61 100uf c61 100uf gnd a1 gnd a4 gnd a6 gnd b1 gnd b2 gnd b3 gnd b4 gnd b6 gnd c6 gnd d6 gnd e6 gnd f1 gnd f2 gnd f3 gnd f4 gnd f5 gnd f6 gnd g1 gnd g2 gnd g3 gnd g4 gnd g5 gnd g6 gnd h2 gnd h3 gnd h4 gnd h5 gnd h6 gnd k1 gnd k2 gnd k3 gnd k4 gnd k5 gnd k6 gnd l1 gnd l2 gnd l3 gnd l4 gnd l5 gnd l6 gnd m3 gnd m6 gnd n1 gnd n2 gnd n3 gnd n6 gnd p6 gnd q6 gnd r1 gnd r2 gnd r5 gnd r6 dvdd18 a5 dvdd18 b5 avdd18 c1 avdd18 c2 avdd18 c3 avdd18 c4 dvdd18 c5 avdd18 d1 avdd18 d2 avdd18 d3 dvdd18 d4 dvdd18 d5 avdd18 e1 avdd18 e2 dvdd18 e3 dvdd18 e4 dvdd18 e5 avdd33 m4 dvdd33 m5 dvdd33 n5 dvdd33 p5 dvdd33 q5 avdd33 n4 avdd33 p1 avdd33 p2 avdd33 p3 avdd33 p4 avdd33 q1 avdd33 q2 avdd33 q3 avdd33 q4 gnd j2 gnd j3 gnd j4 gnd j5 gnd j6 c49 100uf c49 100uf gnd gnd gnd gnd bank 2 j11b asp-122952-01 gnd gnd gnd gnd bank 2 j11b asp-122952-01 d0 41 d1 42 d2 43 d3 44 3v3 45 12v 46 lvds_txp0 47 lvds_rxp0 48 lvds_txn0 49 lvds_rxn0 50 3v3 51 12v 52 lvds_txp1 53 lvds_rxp1 54 lvds_txn1 55 lvds_rxn1 56 3v3 57 12v 58 lvds_txp2 59 lvds_rxp2 60 lvds_txn2 61 lvds_rxn2 62 3v3 63 12v 64 lvds_txp3 65 lvds_rxp3 66 lvds_txn3 67 lvds_rxn3 68 3v3 69 12v 70 lvds_txp4 71 lvds_rxp4 72 lvds_txn4 73 lvds_rxn4 74 3v3 75 12v 76 lvds_txp5 77 lvds_rxp5 78 lvds_txn5 79 lvds_rxn5 80 3v3 81 12v 82 lvds_txp6 83 lvds_rxp6 84 lvds_txn6 85 lvds_rxn6 86 3v3 87 12v 88 lvds_txp7 89 lvds_rxp7 90 lvds_txn7 91 lvds_rxn7 92 3v3 93 12v 94 clkout1p 95 clkin1p 96 clkout1n 97 clkin1n 98 3v3 99 gnd 165 gnd 166 gnd 167 gnd 168 12v 100 c62 100uf c62 100uf c53 100uf c53 100uf c46 2.2uf c46 2.2uf gnd gnd gnd gnd bank 3 j11c asp-122952-01 gnd gnd gnd gnd bank 3 j11c asp-122952-01 lvds_txp8 101 gnd 169 lvds_rxp8 102 lvds_txn8 103 lvds_rxn8 104 3v3 105 12v 106 lvds_txp9 107 lvds_rxp9 108 lvds_txn9 109 lvds_rxn9 110 3v3 111 12v 112 lvds_txp10 113 lvds_rxp10 114 lvds_txn10 115 lvds_rxn10 116 3v3 117 12v 118 lvds_txp11 119 lvds_rxp11 120 lvds_txn11 121 lvds_rxn11 122 3v3 123 12v 124 lvds_txp12 125 lvds_rxp12 126 lvds_txn12 127 lvds_rxn12 128 3v3 129 12v 130 lvds_txp13 131 lvds_rxp13 132 lvds_txn13 133 lvds_rxn13 134 3v3 135 12v 136 lvds_txp14 137 lvds_rxp14 138 lvds_txn14 139 lvds_rxn14 140 3v3 141 12v 142 lvds_txp15 143 lvds_rxp15 144 lvds_txn15 145 lvds_rxn15 146 3v3 147 12v 148 lvds_txp16 149 lvds_rxp16 150 lvds_txn16 151 lvds_rxn16 152 3v3 153 12v 154 clkout2p 155 clkin2p 156 clkout2n 157 clkin2n 158 3v3 159 12v 160 gnd 170 gnd 171 gnd 172 c63 2.2uf c63 2.2uf gnd gnd gnd gnd bank 1 j10a asp-122952-01 gnd gnd gnd gnd bank 1 j10a asp-122952-01 xcvr_txp7 1 xcvr_rxp7 2 xcvr_txn7 3 xcvr_rxn7 4 xcvr_txp6 5 xcvr_rxp6 6 xcvr_txn6 7 xcvr_rxn6 8 xcvr_txp5 9 xcvr_rxp5 10 xcvr_txn5 11 xcvr_rxn5 12 xcvr_txp4 13 xcvr_rxp4 14 xcvr_txn4 15 xcvr_rxn4 16 xcvr_txp3 17 xcvr_rxp3 18 xcvr_txn3 19 xcvr_rxn3 20 xcvr_txp2 21 xcvr_rxp2 22 xcvr_txn2 23 xcvr_rxn2 24 xcvr_txp1 25 xcvr_rxp1 26 xcvr_txn1 27 xcvr_rxn1 28 xcvr_txp0 29 xcvr_rxpo 30 xcvr_txn0 31 xcvr_rxn0 32 sda 33 scl 34 jtag_tck 35 jtag_tms 36 jtag_tdo 37 jtag_tdi 38 clkout0 39 clkin0 40 gnd 161 gnd 162 gnd 163 gnd 164 c54 100uf c54 100uf figure 8. dc2085 demo circuit schematic (sheet 4) schematic diagram dc2085afb demo manual dc 2085
14 ? linear technology corporation 2014 lt 0317 rev b ? printed in usa demonstration board important notice linear technology corporation ( lt c ) provides the enclosed product(s) under the following as is conditions: this demonstration board ( demo board) kit being sold or provided by linear technology is intended for use for engineering development or evaluation purposes only and is not provided by lt c for commercial use. as such, the demo board herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. as a prototype, this product does not fall within the scope of the european union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. if this evaluation kit does not meet the specifications recited in the demo board manual the kit may be returned within 30 days from the date of delivery for a full refund. the foregoing warranty is the exclusive warranty made by the seller to buyer and is in lieu of all other warranties, expressed, implied, or statutory, including any warranty of merchantability or fitness for any particular purpose. except to the extent of this indemnity, neither party shall be liable to the other for any indirect , special, incidental, or consequential damages. the user assumes all responsibility and liability for proper and safe handling of the goods. further, the user releases lt c from all claims arising from the handling or use of the goods. due to the open construction of the product, it is the users responsibility to take any and all appropriate precautions with regard to electrostatic discharge. also be aware that the products herein may not be regulatory compliant or agency certified (fcc, ul, ce, etc.). no license is granted under any patent right or other intellectual property whatsoever. lt c assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. lt c currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. please read the demo board manual prior to handling the product . persons handling this product must have electronics training and observe good laboratory practice standards. common sense is encouraged. this notice contains important safety information about temperatures and voltages. for further safety concerns, please contact a lt c applica- tion engineer. mailing address: linear t echnology 1630 mccarthy blvd. milpitas, ca 95035 copyright ? 2004, linear technology corporation dc2085afb demo manual dc 2085

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