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1 description ltc 6430 and ltc 2158 15db differential amplifier and 14-bit, 310msps dual adc demonstration circuit 1946 a supports the lt c ? 6430 and the ltc2158 high speed adc. it was specially designed for applications that include an LTC6430, a high speed amplifier with 15db of gain. the circuitry on the analog inputs is optimized for analog input frequencies from 50 mhz up to 1 ghz. refer to the l , lt, ltc, ltm, linear technology and the linear logo are registered trademarks and pscope is a trademark of linear technology corporation. all other trademarks are the property of their respective owners. data sheet for proper input networks for different input frequencies design files for this circuit board are available at http://www .linear.com/demo table 1. dc1946a demonstration circuit adc part number amplifier part number resolution maximum sample rate input frequency 1946a ltc2158-14 LTC6430-15 14-bit 310msps 50-1000mhz table 2. performance summary (t a = 25c) parameter condition min typ max unit supply voltage C adc (v + ) this supply must provide up to 800ma. 3.0 6 v supply voltage C amplifier (+5v) this supply must provide up to 500ma. this pin is unregulated 4.75 5 5.25 v analog input range 400 mv p-p logic input voltages minimum logic high 1.2 v maximum logic low 0.6 v logic output voltages (differential) nominal logic levels (100 load, 3.5ma mode, 1.25v common mode) 350 mv minimum logic levels (100 load, 3.5ma mode, 1.25v common mode) 247 mv sampling frequency (encode clock frequency) 10 310 mhz encode clock level (single-ended at j2) minimum logic levels (enc C tied to gnd) 0 v maximum logic level (enc C tied to gnd) 3.6 v encode clock level (differential at j2) minimum logic levels (enc C not tied to gnd, 1.2v common mode) 0.2 v dc1946af demo manual dc1946a
2 quick s tart p roce d ure demonstration circuit 1946 a is easy to set up to evaluate the performance of the ltc2158 a/d converter. refer to figure 1 for proper measurement equipment setup and follow the procedure below: setup the dc1371 usb demonstration circuit was supplied with the dc1946a global demonstration circuit, follow the dc1371 quick start guide to install the required software and for connecting the dc1371 to the dc1946 a and to a pc. figure 1. dc1946a setup (zoom for detail) 3.0v to 5v channel 1 +5v differential analog inputs channel 2 single-ended encode clock jumpers shown in their default positions the dc1946 connects to the dc1371 via an fmc connector dc1946af demo manual dc1946a
3 quick s tart p roce d ure h ard w are setup smas j4 & j5: channel 1 analog inputs: as a default the dc1946a is populated to accept a single-ended input. ap - ply a single-ended signal to j4. for use with a differential signal remove r3 and populate r11 with a 0 resistor. apply a differential signal to these sma connectors from a differential driver. these smas are positioned 0.8" apart to accommodate lt c differential driver boards. j6 & j7: channel 2 analog inputs. as a default the dc1946a is populated to accept a single-ended input. ap - ply a single-ended signal to j6. for use with a differential signal remove r7 and populate r13 with a 0 resistor. apply a differential signal to these sma connectors from a differential driver. these smas are positioned 0.8" apart to accommodate lt c differential driver boards. j2 clk+: positive encode clock input. as a default the demo board is populated to accept a single-ended clock input from a low jitter signal generator. for other popula - tion options see the encode clock section of this manual. j3 clkC: negative encode clock input. as a default this input port is grounded to accommodate the single-ended clock drive. for other population options see the encode clock section of this manual. turrets v + : positive input voltage for the adc and digital buffers. this voltage feeds a regulator that supplies the proper voltages for the adc and buffers. the voltage range for this turret is 3.3v to 5v. +5v: positive input voltage for the LTC6430. apply a 5v signal to this turret to power the LTC6430. this turret is connected to the amplifier directly and is not regulated. there is a resistor on the back of the board r14 that will connect the power pins of the two amplifiers. by removing this resistor each amplifier can be powered independently. sense: optional reference voltage. this pin is connected directly to the sense pin of the adc. connect sense to a 1.25v external reference and the external reference mode is automatically selected. the external reference must be 1.25v 25 mv for proper operation. if no external voltage is supplied, this pin will be pulled up to v dd through a weak pull-up resistor. gnd: ground connection. this demo board only has a single ground plane. this turret should be tied to the gnd terminal of the power supply being used. jumpers the dc1946a demonstration circuit should have the fol- lowing jumper settings as default positions ( per figure?1) which configure the adc in serial programming mode. in the default configuration jp1-jp2 should be left in the default locations. this will pull par /ser low putting the part in serial configuration mode. jp1- par /ser: selects parallel or serial programming mode ( default: serial). the dc1946 a will not work in parallel programming mode unless a custom fpga load is used. jp2-eeprom: eeprom write protect. for factory use only. should be left in the enable (prog) position. applying po w er and signals to t h e dc1946a demonstration circuit if a dc1371 is used to acquire data from the dc1946a, the dc1371 must first be connected to a powered usb port and provided an external 5 v before applying +3 v to +5.0 v across the pins marked v + and gnd on the dc1946 a. the 5 v for the LTC6430 should be applied after the adc is powered. dc1946a requires 3 v for proper operation. regulators on the board produce the voltages required for the adc. the power for the LTC6430 is unregulated. the dc1946a demonstration circuit requires up to 800 ma on v+ and 500 ma on +5v. the dc1946a should not be re- moved or connected to the dc1371 while power is applied. dc1946af demo manual dc1946a
4 quick s tart p roce d ure analog input net w ork the input network of the dc1946a can be modified to ac- commodate various applications. in the default setup j 4 and j6 are used as single-ended inputs. onboard transformers are used to do a single-ended-to-differential translation to drive the LTC6430 differentially. if differential drive is desired both of the inputs are brought out to sma connec - tors so the demo board can be driven with a differential sour ce. to drive the demo board with a differential source simply remove r3 and r7 and populate r11 and r13 with 0 resistors. then remove t1 and t2 and jump over the pads with 0 resistors. this will allow the board to be driven differentially from a differential source. the inputs sma connectors for the input signals are 0.8 " apart to accommodate lt c differential driver boards. in almost all cases, off board filters will be required on the analog input of the differential driver to produce data sheet snr. the off board filters should be located close to the inputs of the differential driver to avoid reflections from impedance discontinuities at the driven end of a long transmission line. most filters do not present 50 outside the passband. in some cases, 3 db to 10 db pads may be required to obtain low distortion. apply the analog input signal of interest to the sma con - nectors on the dc1946a marked j4 and j6. encode clock apply an encode clock to the sma connector on the dc1946a demonstration circuit board marked j2. as a default the dc1946a is populated to have a single-ended clock input. it is possible to modify the demo board. for the best noise performance, the encode input must be driven with a very low jitter signal source. the amplitude should be as large as possible up to 2v p-p or 10dbm. using bandpass filters on the clock and the analog input will improve the noise performance by reducing the wideband noise power of the signals. in the case of the dc1946a, a bandpass filter used for the clock should be used prior to the dc1075a. data sheet fft plots are taken with 10-pole lc filters made by tte ( los angeles, ca) to suppress signal generator harmonics, nonharmonically related spurs and broadband noise. low phase noise agilent 8644 b genera - tors are used with tt e bandpass filters for both the clock input and the analog input. when using a pecl or lvds clock you can drive the dc1946 a differentially through j 2 and j 3. from the default population, remove the resistors in the r33, r22 and r23 positions and populate 0 resistors in the r31, r32, r34, and r35 positions. add the appropriate termination for your clock signal. r27, r28, r29, r30 and r26 are avail - able to provide the proper termination for lvds, pecl, or cml signaling. blocking capacitors can be installed in the r44 and r45 positions if the common mode voltage of the clock is not compatible with the ltc2158. soft w are the dc1371 is controlled by the pscope? system soft - ware provided or downloaded from the linear technology website at http://www.linear.com/software/. if a dc1371 was provided, follow the dc1371 quick start guide and the instructions below. to start the data collection software if pscope.exe, is installed ( by default) in \ program files\ lt c \ pscope\, double click the pscope icon or bring up the run window under the start menu and browse to the pscope directory and select pscope. if the dc1946 a demonstration circuit is properly connected to the dc1371, pscope should automatically detect the dc1946a, and configure itself accordingly. if necessary the procedure below explains how to manually configure pscope. under the configure menu, go to adc configuration.... check the config manually box and use the following configuration options, see figure 2: manual configuration settings: bits: 14 alignment: 16 fpga ld: s2157 channs: 2 dc1946af demo manual dc1946a
5 quick s tart p roce d ure bipolar: unchecked positive-edge clk: unchecked if everything is hooked up properly, powered and a suit - able encode clock is present, clicking the collect button should result in time and frequency plots displayed in the pscope window. additional information and help for pscope is available in the dc1371 quick start guide and in the online help available within the pscope program itself. serial programming pscope has the ability to program the dc1946a board serially through the dc1371. there are several options available for the ltc2158 that are only available through serially programming. pscope allows all of these features to be tested. these options are available by first clicking on the set demo bd options icon on the pscope toolbar (figure 3). sleep mode C selects between normal operation, sleep modes: off (default): adc is powered and active on: adc is powered down nap mode C adc core powers down while references stay active: off (default): adc is powered and active on: adc is put into nap mode power down b C powers down channel 2 while references stay active: off (default): adc is powered and active on: channel 2 of adc is powered down figure 2: adc configuration figure 3: pscope toolbar this will bring up the menu shown in figure 4. this menu allows any of the options available for the ltc2158 to be programmed serially. the ltc2158 family has the following options: figure 4: demobd configuration options dc1946af demo manual dc1946a
6 quick s tart p roce d ure clock invert C selects the polarity of the clkout signal: disable (default): normal clkout polarity enable: clkout polarity is inverted clock delay C selects the phase delay of the clkout signal: none (default): no clkout delay 45 deg: clkout delayed by 45 degrees 90 deg: clkout delayed by 90 degrees 135 deg: clkout delayed by 135 degrees clock duty cycle C enables or disables duty cycle stabilizer: stabilizer off (default): duty cycle stabilizer disabled stabilizer on: duty cycle stabilizer enabled output current C selects the l vds output drive current: 1.75ma (default): l vds output driver current 2.1ma: l vds output driver current 2.5ma: l vds output driver current 3.0ma: l vds output driver current 3.5ma: l vds output driver current 4.0ma: l vds output driver current 4.5ma: l vds output driver current internal termination C enables lvds internal termination: off (default): disables internal termination on: enables internal termination outputs C enables digital outputs: enabled (default): enables digital outputs disabled: disables digital outputs test pattern C selects digital output test patterns: off (default): adc data presented at output all out = 1: all digital outputs are 1 all out = 0: all digital outputs are 0 checkerboard: of and d 13-d 0 alternate between 1 01 0101 1010 0101 and 0 10 1010 0101 1010 on alternating samples. alternating: digital outputs alternate between all 1s and all 0s on alternating samples. abp C alternate bit polarity (abp) mode off (default): disables alternate bit polarity on: enables alternate bit polarity ( before enabling abp, be sure the part is in offset binary mode) tp enable C enables test patterns disabled (default): disables test patterns, adc data presented at output enabled: enables the test pattern randomizer C enables data output randomizer off (default): disables data output randomizer on: enables data output randomizer tw o s complement C enables twos complement mode off (default): selects offset binary mode on: selects twos complement mode once the desired settings are selected hit ok and pscope will automatically update the register of the device on the dc1946a demo board. dc1946af demo manual dc1946a
7 p arts list item qty reference part description manufacturer/ part number 1 14 c1, c3, c6, c8, c10, c16, c18, c20, c22, c24, c32, c41, c42, c53 cap., npo, 1000pf, 50v 5% 0402 murata, grm1555c1h102ja01d 2 16 c2, c5, c11, c13, c14, c21, c25, c29, c34, c40, c50, c51, c52, c54, c55, c56 cap., x5r, 0.1f, 10v 10% 0402 avx , 0402zd104 kat 2a 3 3 c4, c17, c30 cap., x5r, 2.2f, 10v 20% 0402 taiyo yuden, lmk105bj225mv-f 4 4 c7, c12, c46, c47 cap., x5r, 0.47f, 10v 10% 0402 tdk, c1005x5r1a474k 5 4 c9, c23, c26, c28 cap., npo, 68pf, 16v 5% 0402 tdk, c1005c0g1h680j 6 2 c15, c39 cap., x5r, 1.0f, 10v 10% 0402 avx , 0402zd105 kat 2a 7 0 c19, c27, c48, c57, c58, c59, c60 cap., opt , 0402 option 8 1 c31 cap., tant., 100f 16v 10% 6032 kemet, t491c107k016zt 9 1 c33 cap., x5r, 47f, 16v 20% 1210 taiyo yuden, emk325bj476mm-t 10 4 c35, c36, c37, c38 cap., x7r, 47pf, 16v 10% 0402 avx , 0402yc470 kat 2a 11 4 c43, c44, c45, c49 cap., x5r, 0.01f, 16v 10% 0402 avx , 0402yc103 kat 2a 12 2 e1, e2 test point, turret, 0.094, pbf mill-max, 2501-2-00-80-00-00-07-0 13 3 e3, e4, e5 test point, turret, 0.061, pbf mill-max, 2308-2-00-80-00-00-07-0 14 2 jp1, jp2 header, 3 pin, 0.079 sullins, nrpn031paen-rc 15 1 j1 bga connector, 40x10 samtec, seam-40-02.0-s-10-2-a-k-tr 16 2 j2, j3 con., sma jack, straight, thru-hole amphenol connex, 132134 17 4 j4, j5, j6, j7 con., sma 50 edge-launch emerson, 142-0701-851 18 4 l1, l2, l3, l4 inductor, cer. chip, 560nh, 2%, 0603 coilcraft, 0603ls-561xglb 19 1 l5 ferrite bead, 33 @ 100mhz, 1206 murata, blm31pg330sn1l 20 1 l6 res., chip, 0, 1/10w, 0603 vishay, crcw06030000z0ea 21 0 l7 ( opt ) inductor, option, 0603 option 22 2 l8, l9 inductor, cer. chip, 120nh, 2%, 0402 coilcraft, 0402cs-r12xglu 23 8 r1, r2, r16, r17, r20, r21, r38, r39 res., chip, 49.9, 1/16w, 1% 0402 vishay, crcw040249r9fked 24 7 r3, r7, r12, r33, r44, r45, r50 res., chip, 0, 1/16w, 0402 vishay, crcw04020000z0ed 25 0 r4, r6, r11, r13, r27, r28, r29, r30, r31, r32, r34, r35, r46, r47, r48, r49, r51, r52 res., chip, opt , 0402 option 26 4 r5, r8, r10, r15 res., chip, 348, 1/16w, 1% 0402 vishay, crcw0402348rfked 27 2 r9, r37 res., chip, 3k, 1/16w, 1% 0402 vishay, crcw04023k00fked 28 1 r14 res., chip, 0, 1/8w, 0805 vishay, crcw08050000z0ea 29 3 r18, r24, r25 res., chip, 4.99k, 1/16w, 1% 0402 vishay, crcw04024k99fked 30 5 r19, r40, r41, r42, r43 res., chip, 1k, 1/16w, 1% 0402 vishay, crcw04021k00fked 31 2 r22, r23 res., chip, 5.1, 1/16w, 1% 0402 vishay, crcw04025r10fked 32 1 r26 res., chip, 100, 1/16w, 1% 0402 vishay, crcw0402100rfked 33 1 r36 res., chip, 182k, 1/16w, 1% 0402 vishay, crcw0402182kfked 34 4 r53, r54, r55, r56 res., chip, 150, 1/16w, 1%, 0402 vishay, crcw0402150rfked dc1946af demo manual dc1946a
8 p arts list item qty reference part description manufacturer/ part number 35 3 t1, t2, t3 transformer, rf,smt, 1:1balun macom, maba-007159-000000 36 0 t4, t5 ( opt ) option: transformer, rf,smt, 1:1balun mini-circuts, adtl2-18+ 37 1 u1 ic, dual 14-bit adc, qfn64 linear tech., ltc2158cup-14#pbf 38 2 u2, u3 ic, 50 if amplifier, qfn linear tech., LTC6430aiuf-15#pbf 39 1 u4 i.c., low dropout regulator, 3x3mm, dfn linear tech., lt3080edd-1#pbf 40 1 u5 ic, serial eeprom, tssop microchip tech., 24lc32a-i/st 41 2 xjp1, xjp2 shunt, 2mm samtec, 2sn-bk-g dc1946af demo manual dc1946a
9 s chematic diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a clk+ par/ser par ser sense clk- 1. all resistors and capacitors are 0402 note: unless otherwise specified gnd v+ 3v-6v 10/18/2013 10/18/2013 vdd vdd vdd vdd ovdd vdd ovdd ovdd vdd vdd v+ vdd ovdd db0_1- db10_11+ db12_13- db4_5- db6_7- db2_3+ db8_9+ db10_11- db6_7+ db2_3- db8_9- db0_1+ db4_5+ db12_13+ of- of+ da2_3+ da10_11+ da8_9+ da0_1+ da4_5+ da6_7+ cs sck sdi sdo clkout- da10_11- clkout+ da4_5- da6_7- da2_3- da0_1- da8_9- da12_13+ da12_13- ain1+ ain1- ain2- ain2+ 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 3 ltc2158 and LTC6430 combo board m.hawkins c.mayott n/a ltc2158cup-14, LTC6430aiuf-15 demo circuit 1946a 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 3 ltc2158 and LTC6430 combo board m.hawkins c.mayott n/a ltc2158cup-14, LTC6430aiuf-15 demo circuit 1946a 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 3 ltc2158 and LTC6430 combo board m.hawkins c.mayott n/a ltc2158cup-14, LTC6430aiuf-15 demo circuit 1946a 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 - r38 49.9 r38 49.9 r34 opt r34 opt c44 0.01uf c44 0.01uf u4 lt3080edd-1 u4 lt3080edd-1 vin 7 vctrl 5 vout 3 vin 8 vout 2 vout 1 pad 9 set 4 r2 49.9 r2 49.9 e2 e2 c45 0.01uf c45 0.01uf r44 0 ohms r44 0 ohms r20 49.9 r20 49.9 j2 j2 1 r29 opt r29 opt + c31 100uf 6032 + c31 100uf 6032 c11 0.1uf c11 0.1uf gnd pad u1 ltc2158-14 gnd pad u1 ltc2158-14 vdd 1 vdd 2 gnd 3 aina+ 4 aina- 5 gnd 6 sense 7 vref 8 gnd 9 vcm 10 gnd 11 ainb- 12 ainb+ 13 gnd 14 vdd 15 vdd 16 vdd 17 gnd 18 enc+ 19 enc- 20 gnd 21 of- 22 of+ 23 dbo_1- 24 dbo_1+ 25 db2_3- 26 db2_3+ 27 db4_5- 28 db4_5+ 29 db6_7- 30 db6_7+ 31 ovdd 32 ognd 33 db8_9- 34 db8_9+ 35 db10_11- 36 db10_11+ 37 db12_13- 38 db12_13+ 39 clkout- 40 clkout+ 41 da0_1- 42 da0_1+ 43 da2_3- 44 da2_3+ 45 da4_5- 46 da4_5+ 47 ognd 48 ovdd 49 da6_7- 50 da6_7+ 51 da8_9- 52 da8_9+ 53 da10_11- 54 da10_11+ 55 da12_13- 56 da12_13+ 57 gnd 58 sdo 59 sdi 60 sck 61 cs 62 par/ser 63 vdd 64 gnd 65 c46 0.47uf c46 0.47uf c4 2.2uf c4 2.2uf c13 0.1uf c13 0.1uf c15 1.0uf c15 1.0uf c40 0.1uf c40 0.1uf r17 49.9 r17 49.9 r9 3k r9 3k r1 49.9 r1 49.9 r32 opt r32 opt c50 0.1uf c50 0.1uf c2 0.1uf c2 0.1uf r21 49.9 r21 49.9 c48 opt c48 opt r22 5.1 r22 5.1 r30 opt r30 opt c12 0.47uf c12 0.47uf e3 e3 r45 0 ohms r45 0 ohms r16 49.9 r16 49.9 r26 100 r26 100 c33 47uf 1210 c33 47uf 1210 c25 0.1uf c25 0.1uf l5 ferrite bead, 33 ohms 1206 l5 ferrite bead, 33 ohms 1206 t3 maba-007159-000000 t3 maba-007159-000000 5 4 3 1 2 c43 0.01uf c43 0.01uf c14 0.1uf c14 0.1uf r19 1k r19 1k r28 opt r28 opt c47 0.47uf c47 0.47uf r39 49.9 r39 49.9 r35 opt r35 opt r33 0 ohms r33 0 ohms r23 5.1 r23 5.1 j3 j3 1 r36 182k r36 182k r27 opt r27 opt l7 opt 0603 l7 opt 0603 jp1 jp1 1 3 2 r31 opt r31 opt c5 0.1uf c5 0.1uf c51 0.1uf c51 0.1uf c29 0.1uf c29 0.1uf c7 0.47uf c7 0.47uf c52 0.1uf c52 0.1uf e1 e1 c30 2.2uf c30 2.2uf l6 0 ohm res. l6 0 ohm res. c39 1.0uf c39 1.0uf c17 2.2uf c17 2.2uf r37 3k r37 3k c49 0.01uf c49 0.01uf dc1946af demo manual dc1946a
10 s chematic diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a eeprom wp prog 10/18/2013 vdd da10_11+ da10_11- da6_7- da6_7+ da2_3- da2_3+ db6_7- db2_3- db10_11- db2_3+ db10_11+ db6_7+ db12_13+ da12_13- da12_13+ db4_5+ db8_9- db4_5- db12_13- da4_5+ da4_5- db8_9+ da0_1+ da0_1- da8_9- da8_9+ db0_1- db0_1+ clkout+ clkout- sdo cs sck sdi of- of+ 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 3 ltc2158 and LTC6430 combo board m.hawkins c.mayott n/a ltc2158cup-14, LTC6430aiuf-15 demo circuit 1946a 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 3 ltc2158 and LTC6430 combo board m.hawkins c.mayott n/a ltc2158cup-14, LTC6430aiuf-15 demo circuit 1946a 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 3 ltc2158 and LTC6430 combo board m.hawkins c.mayott n/a ltc2158cup-14, LTC6430aiuf-15 demo circuit 1946a j1j seam-10x40pin j1j seam-10x40pin gnd j1 clk1_c2m_p j2 clk1_c2m_n j3 gnd j4 gnd j5 ha03_p j6 ha03_n j7 gnd j8 ha07_p j9 ha07_n j10 gnd j11 ha11_p j12 ha11_n j13 gnd j14 ha14_p j15 ha14_n j16 gnd j17 ha18_p j18 ha18_n j19 gnd j20 ha22_p j21 ha22_n j22 gnd j23 hb01_p j24 hb01_n j25 gnd j26 pb07_p j27 hb07_n j28 gnd j29 hb11_p j30 hb11_n j31 gnd j32 hb15_p j33 hb15_n j34 gnd j35 hb18_p j36 hb18_n j37 gnd j38 vio_b_m2c j39 gnd j40 r25 4.99k r25 4.99k j1e seam-10x40pin j1e seam-10x40pin gnd e1 ha01_p_cc e2 ha01_n_cc e3 gnd e4 gnd e5 ha05_p e6 ha05_n e7 gnd e8 ha09_p e9 ha09_n e10 gnd e11 ha13_p e12 ha13_n e13 gnd e14 ha16_p e15 ha16_n e16 gnd e17 ha20_p e18 ha20_n e19 gnd e20 hb03_p e21 hb03_n e22 gnd e23 hb05_p e24 hb05_n e25 gnd e26 hb09_p e27 hb09_n e28 gnd e29 hb13_p e30 hb13_n e31 gnd e32 hb21_p e33 hb21_n e34 gnd e35 hb20_p e36 hb20_n e37 gnd e38 vadj e39 gnd e40 r24 4.99k r24 4.99k r18 4.99k r18 4.99k j1a seam-10x40pin j1a seam-10x40pin gnd a1 dp1_m2c_p a2 dp1_m2c_n a3 gnd a4 gnd a5 dp2_m2c_p a6 dp2_m2c_n a7 gnd a8 gnd a9 dp3_m2c_p a10 dp3_m2c_n a11 gnd a12 gnd a13 dp4_m2c_p a14 dp4_m2c_n a15 gnd a16 gnd a17 dp5_m2c_p a18 dp5_m2c_n a19 gnd a20 gnd a21 dp1_c2m_p a22 dp1_c2m_n a23 gnd a24 gnd a25 dp2_c2m_p a26 dp2_c2m_n a27 gnd a28 gnd a29 dp3_c2m_p a30 dp3_c2m_n a31 gnd a32 gnd a33 dp4_c2m_p a34 dp4_c2m_n a35 gnd a36 gnd a37 dp5_c2m_p a38 dp5_c2m_n a39 gnd a40 j1k seam-10x40pin j1k seam-10x40pin vref_b_m2c k1 gnd k2 gnd k3 clk1_m2c_p k4 clk1_m2c_n k5 gnd k6 ha02_p k7 ha02_n k8 gnd k9 ha06_p k10 ha06_n k11 gnd k12 ha10_p k13 ha10_n k14 gnd k15 ha17_p_cc k16 ha17_n_cc k17 gnd k18 ha21_p k19 ha21_n k20 gnd k21 ha23_p k22 ha23_n k23 gnd k24 hb00_p_cc k25 hb00_n_cc k26 gnd k27 hb06_p_cc k28 hb06_n_cc k29 gnd k30 hb10_p k31 hb10_n k32 gnd k33 hb14_p k34 hb14_n k35 gnd k36 hb17_p_cc k37 hb17_n_cc k38 gnd k39 vio_b_m2c k40 jp2 jp2 1 3 2 c35 47pf c35 47pf c36 47pf c36 47pf c37 47pf c37 47pf c38 47pf c38 47pf j1f seam-10x40pin j1f seam-10x40pin pg_m2c f1 gnd f2 gnd f3 ha00_p_cc f4 ha00_n_cc f5 gnd f6 ha04_p f7 ha04_n f8 gnd f9 ha08_p f10 ha08_n f11 gnd f12 ha12_p f13 ha12_n f14 gnd f15 ha15_p f16 ha15_n f17 gnd f18 ha19_p f19 ha19_n f20 gnd f21 hb02_p f22 hb02_n f23 gnd f24 hb04_p f25 hb04_n f26 gnd f27 hb08_p f28 hb08_n f29 gnd f30 hb12_p f31 hb12_n f32 gnd f33 hb16_p f34 hb16_n f35 gnd f36 hb19_p f37 hb19_n f38 gnd f39 vadj f40 j1b seam-10x40pin j1b seam-10x40pin res1 b1 gnd b2 gnd b3 dp9_m2c_p b4 dp9_m2c_n b5 gnd b6 gnd b7 dp8_m2c_p b8 dp8_m2c_n b9 gnd b10 gnd b11 dp7_m2c_p b12 dp7_m2c_n b13 gnd b14 gnd b15 dp6_m2c_p b16 dp6_m2c_n b17 gnd b18 gnd b19 gbtclk1_m2c_p b20 gbtclk1_m2c_n b21 gnd b22 gnd b23 dp9_c2m_p b24 dp9_c2m_n b25 gnd b26 gnd b27 dp8_c2m_p b28 dp8_c2m_n b29 gnd b30 gnd b31 dp7_c2m_p b32 dp7_c2m_n b33 gnd b34 gnd b35 dp6_c2m_p b36 dp6_c2m_n b37 gnd b38 gnd b39 res0 b40 c54 0.1uf c54 0.1uf r40 1k r40 1k j1g seam-10x40pin j1g seam-10x40pin gnd g1 clk0_c2m_p g2 clk0_c2m_n g3 gnd g4 gnd g5 la00_p_cc g6 la00_n_cc g7 gnd g8 la03_p g9 la03_n g10 gnd g11 la08_p g12 la08_n g13 gnd g14 la12_p g15 la12_n g16 gnd g17 la16_p g18 la16_n g19 gnd g20 la20_p g21 la20_n g22 gnd g23 la22_p g24 la22_n g25 gnd g26 la25_p g27 la25_n g28 gnd g29 la29_p g30 la29_n g31 gnd g32 la31_p g33 la31_n g34 gnd g35 la33_p g36 la33_n g37 gnd g38 vadj g39 gnd g40 r41 1k r41 1k r42 1k r42 1k j1c seam-10x40pin j1c seam-10x40pin gnd c1 dp0_c2m_p c2 dp0_c2m_n c3 gnd c4 gnd c5 dp0_m2c_p c6 dp0_m2c_n c7 gnd c8 gnd c9 la06_p c10 la06_n c11 gnd c12 gnd c13 la10_p c14 la10_n c15 gnd c16 gnd c17 la14_p c18 la14_n c19 gnd c20 gnd c21 la18_p_cc c22 la18_n_cc c23 gnd c24 gnd c25 la27_p c26 la27_n c27 gnd c28 gnd c29 scl c30 sda c31 gnd c32 gnd c33 ga0 c34 12p0v c35 gnd c36 12p0v c37 gnd c38 3p3v c39 gnd c40 r43 1k r43 1k j1h seam-10x40pin j1h seam-10x40pin vref_a_m2c h1 prsnt_m2c_n h2 gnd h3 clk0_m2c_p h4 clk0_m2c_n h5 gnd h6 la02_p h7 la02_n h8 gnd h9 la04_p h10 la04_n h11 gnd h12 la07_p h13 la07_n h14 gnd h15 la11_p h16 la11_n h17 gnd h18 la15_p h19 la15_n h20 gnd h21 la19_p h22 la19_n h23 gnd h24 la21_p h25 la21_n h26 gnd h27 la24_p h28 la24_n h29 gnd h30 la28_p h31 la28_n h32 gnd h33 la30_p h34 la30_n h35 gnd h36 la32_p h37 la32_n h38 gnd h39 vadj h40 j1d seam-10x40pin j1d seam-10x40pin pg_c2m d1 gnd d2 gnd d3 gbtclk0_m2c_p d4 gbtclk0_m2c_n d5 gnd d6 gnd d7 la01_p_cc d8 la01_n_cc d9 gnd d10 la05_p d11 la05_n d12 gnd d13 la09_p d14 la09_n d15 gnd d16 la13_p d17 la13_n d18 gnd d19 la17_p_cc d20 la17_n_cc d21 gnd d22 la23_p d23 la23_n d24 gnd d25 la26_p d26 la26_n d27 gnd d28 tck d29 tdi d30 tdo d31 3p3vaux d32 tms d33 trst_n d34 ga1 d35 3p3v d36 gnd d37 3p3v d38 gnd d39 3p3v d40 u5 24lc32a u5 24lc32a a0 1 a1 2 a2 3 vss 4 sda 5 scl 6 wp 7 vcc 8 dc1946af demo manual dc1946a
11 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. s chematic diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a +ina -ina +5v +inb -inb +5v uf24 4x4 uf24 4x4 tranformer part option for t1 and t2 10/18/2013 t1_3 t2_3 t1_5 t1_4 t2_5 t2_4 t1_5 t1_4 t2_5 t2_4 t2_1 t1_1 t1_3 t2_3 t2_2 t1_2 t1_2 t1_1 t2_2 t2_1 vcc_b vcc_b vcc_b vcc_a vcc_b vcc_a vcc_a vcc_a ain1+ ain1- ain2- ain2+ 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 3 ltc2158 and LTC6430 combo board m.hawkins c. mayott n/a ltc2158cup-14, LTC6430aiuf-15 demo circuit 1946a 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 3 ltc2158 and LTC6430 combo board m.hawkins c. mayott n/a ltc2158cup-14, LTC6430aiuf-15 demo circuit 1946a 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 3 ltc2158 and LTC6430 combo board m.hawkins c. mayott n/a ltc2158cup-14, LTC6430aiuf-15 demo circuit 1946a c57 opt c57 opt l3 560nh 0603 l3 560nh 0603 1 2 t5 mini-circuits, adt2l-18+ t5 mini-circuits, adt2l-18+ 5 4 1 2 3 6 t4 mini-circuits, adt2l-18+ t4 mini-circuits, adt2l-18+ 5 4 1 2 3 6 r4 opt r4 opt e5 e5 c21 0.1uf c21 0.1uf c58 opt c58 opt c32 1000pf c32 1000pf c8 1000pf c8 1000pf r7 0 ohms r7 0 ohms c18 1000pf c18 1000pf r5 348 r5 348 l2 560nh 0603 l2 560nh 0603 1 2 t1 maba-007159 t1 maba-007159 5 4 1 2 3 c27 opt c27 opt c20 1000pf c20 1000pf j4 j4 1 c3 1000pf c3 1000pf c42 1000pf c42 1000pf c53 1000pf c53 1000pf t2 maba-007159 t2 maba-007159 5 4 1 2 3 c34 0.1uf c34 0.1uf r48 opt r48 opt c41 1000pf c41 1000pf r53 150 r53 150 r50 0 ohms r50 0 ohms r55 150 r55 150 l8 120nh l8 120nh 1 2 c19 opt c19 opt r56 150 r56 150 r3 0 ohms r3 0 ohms r6 opt r6 opt c16 1000pf c16 1000pf c24 1000pf c24 1000pf c26 68pf c26 68pf j5 j5 1 r51 opt r51 opt l4 560nh 0603 l4 560nh 0603 1 2 c9 68pf c9 68pf c56 0.1uf c56 0.1uf c6 1000pf c6 1000pf gnd pad u2 LTC6430-15 gnd pad u2 LTC6430-15 nc 2 gnd 14 nc 1 in 24 nc 4 nc 6 gnd 8 nc 10 nc 21 nc 19 gnd 17 vcc 22 nc 20 +out 18 t_diode 16 nc 5 -in 7 vcc 9 nc 11 nc 15 nc 12 -out 13 nc 3 gnd 23 gnd 25 r13 opt r13 opt r15 348 r15 348 r47 opt r47 opt l1 560nh 0603 l1 560nh 0603 1 2 l9 120nh l9 120nh 1 2 c1 1000pf c1 1000pf r8 348 r8 348 r11 opt r11 opt c60 opt c60 opt c28 68pf c28 68pf gnd pad u3 LTC6430-15 gnd pad u3 LTC6430-15 nc 2 gnd 14 nc 1 in 24 nc 4 nc 6 gnd 8 nc 10 nc 21 nc 19 gnd 17 vcc 22 nc 20 +out 18 t_diode 16 nc 5 -in 7 vcc 9 nc 11 nc 15 nc 12 -out 13 nc 3 gnd 23 gnd 25 r46 opt r46 opt j7 j7 1 r14 0 ohms 0805 r14 0 ohms 0805 c22 1000pf c22 1000pf c59 opt c59 opt e4 e4 r52 opt r52 opt r54 150 r54 150 c55 0.1uf c55 0.1uf r10 348 r10 348 j6 j6 1 r49 opt r49 opt c23 68pf c23 68pf r12 0 ohms r12 0 ohms c10 1000pf c10 1000pf dc1946af demo manual dc1946a
12 linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax : (408) 434-0507 www.linear.com ? linear technology corporation 2014 lt 0514 ? 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, incident al, 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 technology 1630 mccarthy blvd. milpitas, ca 95035 copyright ? 2004, linear technology corporation dc1946af demo manual dc1946a

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