1 description ltc 2323/ ltc 2321 dual 16-bit/14-bit/12-bit, 5msps/2msps, serial, high speed sar adcs demonstration circuit 1996a features the lt c ? 2323 family. with up to 5msps, these differential, dual channel, 16-bit, serial, high speed successive approximation register (sar) adcs are available in a 28-lead qfn package. the ltc2323 family has an internal 20ppm/c reference and an spi-compatible serial interface that supports cmos and lvds logic. note the demo board is configured for cmos operation by default; see the note under jp3 for lvds operation. the following text refers to the ltc2323, but applies to all members of the family, the only differ - ence being the sample rate and the number of bits. 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. board photo dc1996a demonstrates the dc and ac performance of the ltc2323 in conjunction with the dc890 pscope? data collection board. alternatively, by connecting the dc1996a into a customer application, the performance of the ltc2323 can be evaluated directly in that circuit. design files for this circuit board are available at http://www .linear.com/demo figure 1. dc1996a connection diagram dc1996a f02 hp8642b bpf ?9.5v dc gnd 9.5v dc dc power supply hp8642b bpf to pc usb port dc890 dc1996afb demo manual dc1996a
2 quick start procedure demonstration circuit 1996a is easy to set up and evaluate for performance . refer to figure 1 and follow the proce - dure below. n connect the dc1996a to a dc890 usb high speed data collection board using edge connector p1. n connect the dc890 to a host pc with a standard usb a/b cable. n apply a low jitter signal source to j2 to test channel 2, or to j4 to test channel 1. note that the dc1996a is capable of accepting a differential input signal as well as a single-ended signal. see the hardware setup section for the jumper positions that correspond to these configurations. n as a clock source, apply a low jitter 10dbm sine wave or square wave to connector j1. see table 1 for maximum clock frequencies. note that j1 has a 50 termination resistor to ground. n run the pscope software (pscope.exe version k73, or later) supplied with the dc890 or download it from www. linear. com/ software. complete software doc- umentation is available from the help menu. updates can be downloaded from the tools menu. check for updates periodically, as new features may be added. the pscope software should recognize the dc1996a and configure itself automatically. n click the collect button (figure 2) to begin acquiring data. the collect button then changes to pause, which can be used to stop data acquisition. assembly options table 1. dc1996a assembly options version u1 part number max conversion rate # of bits max clock frequency dc1996a-a ltc2323cufd-16#pbf 5msps 16 110mhz dc1996a-b LTC2321cufd-16#pbf 2msps 16 64mhz dc1996a-c ltc2323cufd-14#pbf 5msps 14 110mhz dc1996a-d LTC2321cufd-14#pbf 2msps 14 62mhz dc1996a-e ltc2323cufd-12 #pbf 5msps 12 95mhz dc1996a-f LTC2321cufd-12#pbf 2msps 12 58mhz figure 2. dc1996a pscope screenshot dc1996afb demo manual dc1996a
3 signal connections j1 clk in: this input has a 50 termination resistor, and is intended to be driven by a low jitter 10dbm sine or square wave. to achieve the full ac performance of this part, the clock jitter should be kept under 2ps. this input is capacitively coupled so that the input clock can be either 0v to 3.3v or 1.65v. this eliminates the need for level shifting. to run at the maximum conversion rate, apply the frequency specified in the table 1. j2 ch2+ input: in the single-ended configuration, this is the channel 2 signal input. for differential operation, this serves as the positive channel 2 signal input. j3 ch2C input: this input is used only for differential operation. it serves as the negative channel 2 signal input. j4 ch1+ input: in the single-ended configuration, this is the channel 1 signal input. for differential operation, this serves as the positive channel 1 signal input. j5 ch1C input: this input is used only for differential operation. it serves as the negative channel 1 signal input. j6 fpga program: factory use only. j7 jtag: factory use only. jp1 +in2 coupling: use this jumper to select ac- or dc- coupling of the signal applied to j2. the default setting is dc. at very low input frequencies, using ac-coupling may degrade the distortion performance. jp2 mode: use this jumper to select the signal input mode for the channel 2 input of the ltc2323. the default setting is diff. the diff setting accepts a single-ended signal from j2 and applies it as a differential signal to channel 2 of the ltc2323. the bip setting accepts a single-ended signal from j2 and applies it as a single-ended bipolar signal to channel 2 of the ltc2323. the uni setting also accepts a single-ended signal from j2, but applies it as a unipolar signal to channel 2 of the ltc2323. jp3 data out: use this jumper to select the data output format from the ltc2323. the default setting is cmos. the output data will not be valid if the jumper is moved to the lvds position unless the following changes have been made: install 100 s0402 resistors at r26, 75, 76, 99 reprogram the cpld through j6 using the program - ming file ltc2323.pof found at: http://www.linear.com/demo/dc1996a move jp3 to the lvds position. jp4 Cin2 coupling: use this jumper to select ac- or dc- coupling of the signal applied to j3. the default setting is dc. at very low input frequencies, using ac-coupling may degrade the distortion performance. jp5 +in1 coupling: use this jumper to select ac- or dc- coupling of the signal applied to j4. the default setting is dc. at very low input frequencies, using ac-coupling may degrade the distortion performance. jp6 cm1: use this jumper to set the dc bias point for the signal applied to j4 when jp5 (+in1 coupling) is in the ac position. the default setting is adc. the ext setting allows the use of an externally applied common mode voltage applied at e1 (ext_cm1). jp7 cm2: use this jumper to set the dc bias point for the signal applied to j2 when jp1 (+in2 coupling) is in the ac position. the default setting is adc. the ext setting allows the use of an externally applied common mode voltage applied at e2 (ext_cm2). jp8 mode: use this jumper to select the signal input mode for the channel 1 input of the ltc2323. the default setting is diff. the diff setting accepts a single-ended signal from j4 and applies it as a differential signal to channel 1 of the ltc2323. the bip setting accepts a single-ended signal from j4 and applies it as a single-ended bipolar signal to channel 1 of the ltc2323. the uni setting also accepts a single-ended signal from j4, but applies it as a unipolar signal to channel 1 of the ltc2323. hardware setup dc1996afb demo manual dc1996a
4 jp9 Cin1 coupling: use this jumper to select ac- or dc- coupling of the signal applied to j5. the default setting is dc. at very low input frequencies, using ac-coupling may degrade the distortion performance. jp10 vccio: use this jumper to select the vccio sup - ply voltage. the default setting is 2.5v. the 1.8v setting selects a 1.8v supply voltage. parts list item qty reference part description manufacturer / part number required circuit components 1 20 c1, c2, c4, c5, c9, c11, c13, c18, c19, c22, c23, c29, c37, c51, c52, c58, c59, c82, c129, c130 cap., x7r, 0.1f, 16v, 10%, 0603 nic, nmc0603x7r104k16trpf 2 24 c3, c6, c16, c17, c20, c21, c24-c26, c28, c30, c34, c47-c50, c53, c54, c57, c61, c70, c76, c79, c81 cap., x5r, 10f, 6.3v, 20%, 0603 nic, nmc0603x5r106m6.3trpf4kf 3 0 c7, c8, c10, c14, c27, c35, c36, c40, c41, c60 cap., 0603 opt 4 2 c12, c41 cap., npo, 200pf, 16v, 5%, 0603 muraa, grm1885c1h201ja01d 5 12 c15, c32, c38, c39, c43, c45, c65, c67, c68, c71, c74, c77 cap., x7r, 1f, 25v, 10%, 0603 tdk, c1608x7r1e105k 6 6 c31, c33, c55, c56, c106, c119 cap., x5r, 4.7f, 6.3v, 10%, 0603 avx , 06036d475 kat 2a 7 2 c42, c44 cap., x5r, 2.2f, 10v, 10%, 0603 murata , grm188r61a225ke34d 8 1 c62 cap., x7r, 47f, 10v, 10%, 1210 murata , grm32er71a476ke15l 9 5 c63, c69, c72, c75, c78 cap., x7r, 0.01f, 6.3v, 10%, 0603 murata , grm188r70j103ka01d 10 3 c64, c66, c73 cap., x7r, 10f, 10v, 10%, 0805 murata , grm21br71a106ke51l 11 1 c80 cap., x5r, 3.3f , 6.3v, 10%, 0603 avx , 06036d335 kat 2a 12 28 c83-c104, c108, c122-c126 cap., x7r, 0.1f, 16v, 10%, 0402 nic, nmc0402x7r104k16trpf 13 1 c105 cap., x5r, 47f, 6.3v, 20%, 0805 taiyo yuden, jmk212bj476mg-t 14 3 c107, c120, c121 cap., x7r, 0.01f, 16v, 10%, 0402 nic, nmc0402x7r103k16trpf 15 1 c109 cap., x7r, 1nf, 16v, 10%, 0402 avx , 0402yc102 kat 2a 16 3 c110, c111, c112 cap., x7r, 22nf, 16v, 10%, 0402 avx , 0402yc223 kat 2a 17 2 c113, c128 cap., x7r, 4.7nf, 16v, 10%, 0402 avx , 0402yc472 kat 2a 18 4 c114, c115, c116, c117 cap., np0, 10pf, 16v, 10%, 0402 avx , 0402ya 100 kat 2a 19 1 c118 cap., tant, 470f 10v, 20%, 7343 avx , tpse477m010r0050 20 1 c127 cap., x7r, 2.2nf, 16v, 10%, 0402 avx , 0402yc222 kat 2a 21 4 d1, d2, d3, d4 diode, schottky, 30v, 200mw sod-323 diode inc., bat 54ws-7-f 22 9 e1-e3, e5, e8-e12 test point, turret, 0.064" mill-max, 2308-2-00-80-00-00-07-0 23 3 e4, e6, e7 test point, turret, 0.094" mill-max, 2501-2-00-80-00-00-07-0 hardware setup jp11 vdd: use this jumper to select the vdd supply volt - age. the default setting is 5v. the 3.3v setting selects a 3.3v supply voltage. jp12 eeprom: factory use only. jp13 osc: use this jumper to enable the onboard encode clock source . the default setting is off. the on setting energizes this source . refer to the dc1996a schematic for additional passive elements required to use the onboard source . dc1996afb demo manual dc1996a
5 item qty reference part description manufacturer / part number 24 11 jp1, jp3-jp7, jp9-jp11, jp13, jp15 header, 13, 0.100" samtec, tsw-103-07-l-s 25 2 jp2, jp8 header, 23, 0.100" samtec, tsw-103-07-l-d 26 2 j6, j7 header, 25, 0.100" samtec, tsw-105-07-l-d 27 5 j1, j2, j3, j4, j5 conn bnc fem jack pc mnt strght amphenol connex, 112404 28 1 l1 ind, ferrite chip, 390, 2000ma, 1206 murata , blm31pg391sn1l 29 15 r1, r2, r10, r21, r27, r46-r48, r51, r52, r57, r58, r60, r64, r66 res., chip, 1k, 1/10w, 1%, 0603 panasonic , erj-3ekf1001v 30 0 r3, r7, r11, r22, r23, r25, r28, r29, r32, r34, r36, r37, r49, r50, r54, r123 res., chip, 0603 opt 31 2 r4, r17 res., chip, 33, 1/10w, 5%, 0603 panasonic , erj-3geyj330v 32 11 r5, r6, r12, r20, r24, r30, r31, r35, r39, r40, r53 res., chip, 0, 1/10w, 0603 panasonic , erj-3gey0r00v 33 4 r8, r18, r33, r44 res., chip, 49.9, 1/10w, 1%, 0603 panasonic , erj-3ekf49r9v 34 1 r9 res., chip, 49.9, 1/4w, 1%, 1206 panasonic , erj-8enf49r9v, 35 4 r13, r16, r38, r43 res., chip, 0, 1/16w, 0402 panasonic , erj-2ge0r00x 36 4 r14, r15, r41, r42 res., chip, 301, 1/10w, 1%, 0603 panasonic , erj-3ekf3010v 37 2 r19, r45 res., chip, 150, 1/10w, 1%, 0603 panasonic , erj-3ekf1500v 38 0 r26, r75, r76, r99 res., chip, 0402 39 2 r55, r56 res., chip , 3.92k, 1/10w, 1%, 0603 panasonic , erj-3ekf3921v 40 1 r59 res., chip, 499, 1/10w, 1%, 0603 panasonic , erj-3ekf4990v 41 1 r61 res., chip, 866, 1/10w, 1%, 0603 panasonic , erj-3ekf8660v 42 1 r62 res., chip, 3.09k, 1/10w, 1%, 0603 panasonic , erj-3ekf3091v 43 1 r63 res., chip, 4.02k, 1/10w, 1%, 0603 panasonic , erj-3ekf4021v 44 1 r65 res., chip, 1.43k, 1/10w, 1%, 0603 panasonic , erj-3ekf1431v 45 33 r69-r72, r77-r98, r100-r104, r119, r120 res., chip, 33, 1/16w, 5%, 0402 panasonic , erj-2gej330x 46 1 r118 res., chip, 1k, 1/16w, 1%, 0402 panasonic , erj-2ekf1001v 47 4 r105, r106, r107, r108 res., chip, 4.99k, 1/10w, 1%, 0603 panasonic , erj-3ekf4991v 48 9 r109-r117 res., chip, 10k, 1/16w, 5%, 0402 panasonic , erj-2geyj103v 49 1 r121 res., chip, 10k, 1/16w, 5%, 0603 panasonic , erj-3geyj103v 50 1 r122 res., chip, 100, 1/10w, 1%, 0603 panasonic , erj-3ekf1000v 51 3 u2, u3, u7 ic, inverter, uhs, single, sc70-5 fairchild , nc7sz04p5x 52 2 u4, u5 ic, 400mhz, amplifier, ms8 linear technology, lt1819cms8#pbf 53 1 u6 ic, flip flop, d- type log, us8 on semi., nl17sz74usg 54 2 u8, u9 ic, voltage reference, msop8 linear technology, ltc6655bhms8- 4.096#pbf 55 2 u10, u21 ic, op-amp, ms8 linear technology, lt6202cs5#pbf 56 4 u11, u13, u14, u15 ic, micropower regulator, so8 linear technology, lt1763cs8#pbf 57 1 u12 ic, micropower neg. regulator, sot-23 linear technology, lt1964es5-sd#pbf 58 1 u16 ic, micropower regulator, so8 linear technology, lt1763cs8-2.5#pbf 59 1 u17 ic, linear regulator, so8 linear technology, lt3021es8-1.2#pbf parts list dc1996afb demo manual dc1996a
6 parts list item qty reference part description manufacturer / part number 60 1 u18 ic, eqfp, cyclone3, wire bond, eqfp144 altera , ep3c5e144c7 61 1 u19 ic, 4-bit, flash memory, so8 altera , epcs4si8 62 1 u20 ic, eeprom, 2kbit, 400khz, 8tssop microchip, 24lc024-i/st 63 1 y1 oscillator , 106.2500mhz, 3.3v, smd cts-frequency controls, cb3lv -3i- 106m2500 64 12 shown on assy dwg shunt, 0.100", 2pos samtec, snt-100-bk-g 65 4 mh1-mh4 standoff , nylon, 0.25" keystone, 8831 (snap-on) dc1996a-a required circuit components 1 1 dc1996a general bom 2 2 r67, r73 res., chip, 1k, 1/16w, 5%, 0402 panasonic , erj-2ekf1001v 3 1 u1 i.c., dual sar adc, qfn28ufd-4x5 linear technology, ltc2323cufd-16#pbf dc1996a-b required circuit components 1 1 dc1996a general bom 2 2 r67, r73 res., chip, 1k, 1/16w, 5%, 0402 panasonic , erj-2ekf1001v 3 1 u1 i.c., dual sar adc, qfn28ufd-4x5 linear technology, LTC2321cufd-16#pbf dc1996a-c required circuit components 1 1 dc1996a general bom 2 2 r68, r73 res., chip, 1k, 1/16w, 5%, 0402 panasonic , erj-2ekf1001v 3 1 u1 i.c., dual sar adc, qfn28ufd-4x5 linear technology, ltc2323cufd-14#pbf dc1996a-d required circuit components 1 1 dc1996a general bom 2 2 r68, r73 res., chip, 1k, 1/16w, 5%, 0402 panasonic , erj-2ekf1001v 3 1 u1 i.c., dual sar adc, qfn28ufd-4x5 linear technology, LTC2321cufd-14#pbf dc1996a-e required circuit components 1 1 dc1996a general bom 2 2 r67, r74 res., chip, 1k, 1/16w, 5%, 0402 panasonic , erj-2ekf1001v 3 1 u1 i.c., dual sar adc, qfn28ufd-4x5 linear technology, ltc2323cufd-12#pbf dc1996a-f required circuit components 1 1 dc1996a general bom 2 2 r67, r74 res., chip, 1k, 1/16w, 5%, 0402 panasonic , erj-2ekf1001v 3 1 u1 i.c., dual sar adc, qfn28ufd-4x5 linear technology, LTC2321cufd-12#pbf dc1996afb demo manual dc1996a
7 schematic diagrams 5 5 4 4 3 3 2 2 1 1 d d c c b b a a 200mhz max clk 2.5vpp ain1+ 0v - 4.096v 1. all resistors are in ohms, 0603. all capacitors are in microfarads, 0603 notes: unless otherwise specified msps 5 a assy * u1 ltc2323cufd-16 bits 16 ain1- 0v - 4.096v mode diff uni bip ain2- 0v - 4.096v mode ain2+ 0v - 4.096v diff uni bip b c LTC2321cufd-16 LTC2321cufd-14 d ltc2323cufd-14 r67 1k opt coupling coupling coupling coupling add 20 mil square pad opening on top solder mask layer on these connetions. 16 14 14 2 2 5 r68 opt 1k r73 r74 1k opt e f LTC2321cufd-12 ltc2323cufd-12 12 12 5 2 1k opt opt 1k vcm_bias_1 vref_1 vcm_bias_1 vcm_bias_1 vcm_bias_2 vref_2 vcm_bias_2 vcm_bias_2 ain2+ ain2- ain1- ain1+ refout2 refout1 vref_2 vcm_bias_2 vcm_bias_1 vref_1 vccio vccio vccio vccio v+ v- v+ v- vccio vccio vdd v+ v- +9v/+10v +9v/+10v v+ v- +3v +3v csb clkout+ clkout- sdo2+ sdo2- sck+ sck- sdo1+ sdo1- clkin 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 demo circuit 1996a 04/01/2014, 12:58 pm 1 2 kim t. doug s. true differential input dual adc ltc232xcufd family b 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 demo circuit 1996a 04/01/2014, 12:58 pm 1 2 kim t. doug s. true differential input dual adc ltc232xcufd family b 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 demo circuit 1996a 04/01/2014, 12:58 pm 1 2 kim t. doug s. true differential input dual adc ltc232xcufd family b revision history description date approved eco rev doug s. production 2 04-01-14 revision history description date approved eco rev doug s. production 2 04-01-14 revision history description date approved eco rev doug s. production 2 04-01-14 jp9 ac dc -in1 jp9 ac dc -in1 1 3 2 c129 0.1uf c129 0.1uf r18 49.9 r18 49.9 r33 49.9 r33 49.9 c54 10uf c54 10uf jp4 ac dc -in2 jp4 ac dc -in2 1 3 2 c11 0.1uf c11 0.1uf j1 j1 u3 nc7sz04p5x u3 nc7sz04p5x 4 5 3 2 c45 1uf c45 1uf c19 0.1uf c19 0.1uf r52 1k r52 1k c53 10uf 6.3v c53 10uf 6.3v r13 0 0402 r13 0 0402 c35 opt c35 opt r25 opt r25 opt jp1 ac dc +in2 jp1 ac dc +in2 1 3 2 + - u5b lt1819cms8 + - u5b lt1819cms8 5 6 7 8 4 r51 1k r51 1k r30 0 r30 0 u7 nc7sz04p5x u7 nc7sz04p5x 4 5 3 2 c39 1uf c39 1uf c28 10uf 6.3v c28 10uf 6.3v c51 0.1uf c51 0.1uf + - u4b lt1819cms8 + - u4b lt1819cms8 5 6 7 8 4 + - u5a lt1819cms8 + - u5a lt1819cms8 3 2 1 8 4 c29 0.1uf c29 0.1uf c10 opt c10 opt r16 0 0402 r16 0 0402 c25 10uf c25 10uf c30 10uf 6.3v c30 10uf 6.3v r31 0 r31 0 c5 0.1uf c5 0.1uf c43 1uf c43 1uf j2 j2 r22 opt r22 opt u6 nl17sz74 u6 nl17sz74 cp 1 clr 6 pr 7 d 2 q 3 q 5 vcc 8 gnd 4 r8 49.9 r8 49.9 c23 0.1uf c23 0.1uf c32 1uf c32 1uf r10 1k r10 1k c56 4.7uf c56 4.7uf r54 opt r54 opt r53 0 r53 0 y1 cb3lv y1 cb3lv eoh 1 vcc 4 gnd 2 out 3 jp6 ext adc cm1 jp6 ext adc cm1 1 3 2 c34 10uf 6.3v c34 10uf 6.3v c12 200pf np0 c12 200pf np0 r15 301 r15 301 c6 10uf 6.3v c6 10uf 6.3v c7 opt c7 opt r35 0 r35 0 c9 0.1uf c9 0.1uf c8 opt c8 opt r11 opt r11 opt r2 1k r2 1k c2 0.1uf c2 0.1uf c130 0.1uf c130 0.1uf r43 0 0402 r43 0 0402 r1 1k r1 1k + - u21 lt6202cs5 + - u21 lt6202cs5 3 4 1 5 2 r7 opt r7 opt c22 0.1uf c22 0.1uf r19 150 r19 150 c20 10uf 6.3v c20 10uf 6.3v j5 j5 c26 10uf 6.3v c26 10uf 6.3v c13 0.1uf c13 0.1uf c14 opt c14 opt c47 10uf 6.3v c47 10uf 6.3v c21 10uf 6.3v c21 10uf 6.3v jp3 lvds cmos data out jp3 lvds cmos data out 1 3 2 + - u10 lt6202cs5 + - u10 lt6202cs5 3 4 1 5 2 r50 opt r50 opt c24 10uf 6.3v c24 10uf 6.3v r29 opt r29 opt jp8 hd2x3-100 jp8 hd2x3-100 1 3 5 6 4 2 r14 301 r14 301 c27 opt c27 opt u9 ltc6655bhms8-4.096 u9 ltc6655bhms8-4.096 shdn 1 vin 2 gnd 3 gnd 4 gnd 5 vout_s 6 vout_f 7 gnd 8 e2 ext_cm2 e2 ext_cm2 r9 49.9 1206 r9 49.9 1206 r32 opt r32 opt r5 0 r5 0 c36 opt c36 opt r44 49.9 r44 49.9 j3 j3 r12 0 r12 0 r21 1k r21 1k c3 10uf 6.3v c3 10uf 6.3v c17 10uf 6.3v c17 10uf 6.3v c48 10uf 6.3v c48 10uf 6.3v r45 150 r45 150 c15 1uf c15 1uf jp2 hd2x3-100 jp2 hd2x3-100 1 3 5 6 4 2 c1 0.1uf c1 0.1uf r121 10k r121 10k u1 * qfn28ufd-4x5 u1 * qfn28ufd-4x5 gnd 4 gnd 5 ain1- 6 ain1+ 7 vdd2 8 cnvl 9 gnd 10 refrtn1 11 refout1 12 vbyp1 13 ovdd 14 sdo1+ 15 sdo1- 16 sck+ 21 sck- 22 gnd 23 vbyp2 24 lvds 25 refout2 26 refrtn2 27 refbg 28 gnd 29 clkout+ 17 clkout- 18 sdo2- 20 sdo2+ 19 vdd1 1 ain2+ 2 ain2- 3 c4 0.1uf c4 0.1uf c52 0.1uf c52 0.1uf r46 1k r46 1k r28 opt r28 opt r27 1k r27 1k c31 4.7uf c31 4.7uf r3 opt r3 opt c49 10uf 6.3v c49 10uf 6.3v r20 33 r20 33 e1 ext_cm1 e1 ext_cm1 c59 0.1uf c59 0.1uf r23 opt r23 opt c18 0.1uf c18 0.1uf c33 4.7uf c33 4.7uf r41 301 r41 301 c58 0.1uf c58 0.1uf r39 0 r39 0 r49 opt r49 opt r24 0 r24 0 c42 2.2uf c42 2.2uf c38 1uf c38 1uf r122 100 r122 100 r34 opt r34 opt jp7 ext adc cm2 jp7 ext adc cm2 1 3 2 jp5 ac dc +in1 jp5 ac dc +in1 1 3 2 j4 j4 c55 4.7uf c55 4.7uf c16 10uf 6.3v c16 10uf 6.3v c44 2.2uf c44 2.2uf r48 1k r48 1k r123 opt r123 opt r42 301 r42 301 c40 opt c40 opt c46 opt c46 opt u2 nc7sz04p5x u2 nc7sz04p5x 4 5 3 2 c57 10uf 6.3v c57 10uf 6.3v c41 200pf np0 c41 200pf np0 c37 0.1uf c37 0.1uf r37 opt r37 opt c50 10uf 6.3v c50 10uf 6.3v u8 ltc6655bhms8-4.096 u8 ltc6655bhms8-4.096 shdn 1 vin 2 gnd 3 gnd 4 gnd 5 vout_s 6 vout_f 7 gnd 8 r40 0 r40 0 r6 0 r6 0 r38 0 0402 r38 0 0402 r4 33 r4 33 jp13 on off osc jp13 on off osc 1 3 2 r17 33 r17 33 c60 opt c60 opt r36 opt r36 opt + - u4a lt1819cms8 + - u4a lt1819cms8 3 2 1 8 4 r47 1k r47 1k c61 10uf 6.3v c61 10uf 6.3v dc1996afb demo manual dc1996a
8 schematic diagrams 5 5 4 4 3 3 2 2 1 1 d d c c b b a a -9v/-10v v- +9v/+10v vccio 2.5v 1.8v vccio gnd +2.5v +1.2v vccint +3v v+ vdd 5v 3.3v vdd -9v/-10v +9v/+10v vccio +2.5v v- +1.2v +3v v+ vdd 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 demo circuit 1996a 04/01/2014, 01:00 pm 2 2 kim t. doug s. true differential input dual adc ltc232xcufd-16/-14 family b 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 demo circuit 1996a 04/01/2014, 01:00 pm 2 2 kim t. doug s. true differential input dual adc ltc232xcufd-16/-14 family b 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 demo circuit 1996a 04/01/2014, 01:00 pm 2 2 kim t. doug s. true differential input dual adc ltc232xcufd-16/-14 family b e4 e4 e3 e3 u12 lt1964es5-sd u12 lt1964es5-sd adj 4 out 5 gnd 1 in 2 shdn 3 r66 1k r66 1k u14 lt1763cs8 u14 lt1763cs8 out 1 sen 2 gnd 3 byp 4 shdn 5 gnd 6 gnd 7 in 8 r62 3.09k r62 3.09k c71 1uf 16v c71 1uf 16v e8 e8 e9 e9 c67 1uf 16v c67 1uf 16v c65 1uf 16v c65 1uf 16v e5 e5 c68 1uf 16v c68 1uf 16v c73 10uf 10v 0805 c73 10uf 10v 0805 r59 499 r59 499 r61 866 r61 866 c75 0.01uf c75 0.01uf r63 4.02k r63 4.02k jp10 jp10 1 3 2 e10 e10 c79 10uf 6.3v c79 10uf 6.3v c69 0.01uf c69 0.01uf c70 10uf 6.3v c70 10uf 6.3v c64 10uf 0805 10v c64 10uf 0805 10v r57 1k r57 1k e11 e11 c76 10uf 6.3v c76 10uf 6.3v u13 lt1763cs8 u13 lt1763cs8 out 1 sen 2 gnd 3 byp 4 shdn 5 gnd 6 gnd 7 in 8 u11 lt1763cs8 u11 lt1763cs8 out 1 sen 2 gnd 3 byp 4 shdn 5 gnd 6 gnd 7 in 8 c66 10uf 10v 0805 c66 10uf 10v 0805 c81 10uf 6.3v c81 10uf 6.3v c74 1uf 16v c74 1uf 16v e6 e6 r65 1.43k r65 1.43k u16 lt1763cs8-2.5 u16 lt1763cs8-2.5 out 1 sen 2 gnd 3 byp 4 shdn 5 gnd 6 gnd 7 in 8 r56 3.92k r56 3.92k e7 e7 c78 0.01uf c78 0.01uf c63 0.01uf c63 0.01uf e12 e12 u17 lt3021es8-1.2 u17 lt3021es8-1.2 out 2 sen 3 agnd 4 shdn 5 gnd 6 in 8 jp11 jp11 1 3 2 r60 1k r60 1k r64 1k r64 1k c77 1uf 16v c77 1uf 16v r58 1k r58 1k c62 47uf 1210 16v c62 47uf 1210 16v u15 lt1763cs8 u15 lt1763cs8 out 1 sen 2 gnd 3 byp 4 shdn 5 gnd 6 gnd 7 in 8 c72 0.01uf c72 0.01uf c80 3.3uf 16v c80 3.3uf 16v r55 3.92k r55 3.92k dc1996afb demo manual dc1996a
9 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. schematic diagrams 5 5 4 4 3 3 2 2 1 1 d d c c b b a a 1. all resistors and capacitors on this page are 0402. notes: unless otherwise specified 2. see assembly table on page 1 for r67, r68, r73, and r74 values. jtag fpga program da0 vccd_pll tdi tms tck tdo tck tdo tms tdi nce da1 da2 da3 da4 da5 da6 da7 da8 da9 da10 da11 da12 da13 da14 cnvclk db0 db1 db2 db3 db4 db5 db6 db7 db8 db9 db10 db11 db12 db13 db14 db12 db13 db14 cnvclk da0 da1 da2 da3 da4 da5 da6 da7 da8 da9 da12 da13 da14 db0 da10 da11 db1 db2 db3 db4 db5 db6 db7 db8 db9 db10 db11 db15 da15 db15 da15 vccio +1.2v +2.5v +1.2v vccio +3v +3v +3v +3v +3v +2.5v vccio +3v vccio vccio vccio +3v +3v clkin csb sdo1- sdo1+ sdo2- sdo2+ clkout+ clkout- sck- sck+ 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 demo circuit 1996a 04/01/2014, 12:59 pm 3 2 kim t. doug s. true differential input dual adc ltc232xcufd-16/-14 family b 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 demo circuit 1996a 04/01/2014, 12:59 pm 3 2 kim t. doug s. true differential input dual adc ltc232xcufd-16/-14 family b 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 demo circuit 1996a 04/01/2014, 12:59 pm 3 2 kim t. doug s. true differential input dual adc ltc232xcufd-16/-14 family b 33 r103 33 r103 c115 10pf c115 10pf u19 epcs4si8 u19 epcs4si8 asdi 5 vcc 8 ncs 1 data 2 vcc 3 gnd 4 vcc 7 dclk 6 c113 4.7nf c113 4.7nf c128 4.7nf c128 4.7nf r73 * r73 * c123 0.1uf c123 0.1uf 33 r101 33 r101 c125 0.1uf c125 0.1uf eeprom array u20 24lc024-i /st eeprom array u20 24lc024-i /st sda 5 vcc 8 a0 1 a1 2 a2 3 gnd 4 wp 7 scl 6 c94 0.1uf c94 0.1uf r107 4.99k 0603 r107 4.99k 0603 c110 22nf c110 22nf 33 r85 33 r85 r106 4.99k 0603 r106 4.99k 0603 33 r91 33 r91 r114 10k r114 10k c117 10pf c117 10pf 33 r90 33 r90 33 r84 33 r84 bank3 u18d cyclone3-ep3c5e144 bank3 u18d cyclone3-ep3c5e144 io1_diffiob1p 38 io2_diffiob1n 39 io3 42 io4 43 io5 44 io6_vref3 46 io7_diffiob9p 49 io8_diffiob9n 50 io9 51 io10_diffiob11p 52 io11_diffiob11n 53 c114 10pf c114 10pf c103 0.1uf c103 0.1uf 33 r88 33 r88 33 r98 33 r98 33 r104 33 r104 c104 0.1uf c104 0.1uf 33 r87 33 r87 r75 opt r75 opt jp12 prog wp eeprom jp12 prog wp eeprom 1 3 2 d3 bat54ws d3 bat54ws 1 2 c102 0.1uf c102 0.1uf 33 r89 33 r89 c119 4.7uf 0603 c119 4.7uf 0603 33 r96 33 r96 33 r102 33 r102 d4 bat54ws d4 bat54ws 1 2 r111 10k r111 10k d1 bat54ws d1 bat54ws 1 2 c101 0.1uf c101 0.1uf 33 r86 33 r86 config u18j cyclone3-ep3c5e144 config u18j cyclone3-ep3c5e144 io1_data1 6 io2_flash_nce 8 n_status 9 dclk 12 io3_data0 13 nconfig 14 tdi 15 tck 16 tms 18 tdo 20 nce 21 io4_dev_oe 86 io5_dev_clrn 87 conf_done 92 msel0 94 msel1 96 msel2 97 io6_init_done 98 io7_crc_error 99 io8_nceo 101 io9_clkusr 103 33 r69 33 r69 33 r94 33 r94 c98 0.1uf c98 0.1uf r118 1k r118 1k c100 0.1uf c100 0.1uf p1 edge-con-100 p1 edge-con-100 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99 c120 0.01uf c120 0.01uf c95 0.1uf c95 0.1uf r105 4.99k 0603 r105 4.99k 0603 33 r70 33 r70 r116 10k r116 10k c99 0.1uf c99 0.1uf bank1 u18b cyclone3-ep3c5e144 bank1 u18b cyclone3-ep3c5e144 io1 1 io2 2 io3 3 io4 4 io5_vref1 7 io6_diffl4p 10 io7_diffl4n 11 clk0 22 clk1 23 l1 blm31pg391sn1l l1 blm31pg391sn1l r76 opt r76 opt 33 r119 33 r119 r115 10k r115 10k r99 opt r99 opt c90 0.1uf c90 0.1uf 33 r78 33 r78 r74 * r74 * bank8 u18i cyclone3-ep3c5e144 bank8 u18i cyclone3-ep3c5e144 io1_diffiot11n 128 io2_diffiot11p 129 io3_diffiot10n 132 io4_diffiot10p 133 io5 135 io6_vref8 136 io7 137 io8 138 io9 141 io10 142 io11_diffiot01n 143 io12_diffiot01p 144 c82 0.1uf 0603 c82 0.1uf 0603 33 r71 33 r71 33 r120 33 r120 c122 0.1uf c122 0.1uf + c118 470uf 7343 + c118 470uf 7343 bank6 u18g cyclone3-ep3c5e144 bank6 u18g cyclone3-ep3c5e144 clk5_diffclk2n 90 clk4_diffclk2p 91 io1 100 io2 104 io3_vref6 105 io4 106 c89 0.1uf c89 0.1uf c121 0.01uf c121 0.01uf c108 0.1uf c108 0.1uf c124 0.1uf c124 0.1uf r109 10k r109 10k c127 2.2nf c127 2.2nf r112 10k r112 10k 33 r83 33 r83 33 r92 33 r92 d2 bat54ws d2 bat54ws 1 2 c107 0.01uf c107 0.01uf r26 opt r26 opt c116 10pf c116 10pf c126 0.1uf c126 0.1uf 33 r72 33 r72 33 r82 33 r82 33 r81 33 r81 c96 0.1uf c96 0.1uf 33 r80 33 r80 pwr u18a cyclone3-ep3c5e144 pwr u18a cyclone3-ep3c5e144 gnd 19 gnd 27 gnda1 36 gnd 41 gnd 48 gnd 57 gnd 63 gnd 82 gnd 95 gnda2 108 gnd 118 gnd 123 gnd 131 gnd 140 gnd 145 vccint 5 vccint 29 vccint 45 vccint 61 vccint 78 vccint 102 vccint 116 vccint 134 vccio1 17 vccio2 26 vccio3 40 vccio3 47 vccio4 56 vccio4 62 vccio5 81 vccio6 93 vccio7 117 vccio7 122 vccio8 130 vccio8 139 vcca1 35 vcca2 107 vccd_pll1 37 vccd_pll2 109 c88 0.1uf c88 0.1uf 33 r79 33 r79 33 r100 33 r100 c93 0.1uf c93 0.1uf j7 hd2x5-100 j7 hd2x5-100 1 3 5 6 4 2 7 9 8 10 c87 0.1uf c87 0.1uf r108 4.99k 0603 r108 4.99k 0603 33 r97 33 r97 33 r77 33 r77 c91 0.1uf 0402 c91 0.1uf 0402 bank5 u18f cyclone3-ep3c5e144 bank5 u18f cyclone3-ep3c5e144 io1 73 io2 74 io3 75 io4_rup3 76 io4_rdn3 77 io5 79 io6_vref5 80 io8_diffior8n 84 io9_diffior8p 85 clk7_diffclk3n 88 clk6_diffclk3p 89 io7 83 c86 0.1uf c86 0.1uf bank4 u18e cyclone3-ep3c5e144 bank4 u18e cyclone3-ep3c5e144 io1_diffiob12p 54 io2_diffiob12n 55 io3 58 io4_diffiob16p 59 io5_diffiob16n 60 io6 64 io7_vref4 65 io8_rup2 66 io9_rdn2 67 io10 68 io11 69 io12_diffiob21p 70 io14 72 io13_diffiob21n 71 c111 22nf c111 22nf c109 1nf c109 1nf 33 r95 33 r95 c85 0.1uf c85 0.1uf r113 10k r113 10k 33 r93 33 r93 r117 10k r117 10k j6 hd2x5-100 j6 hd2x5-100 1 3 5 6 4 2 7 9 8 10 bank2 u18c cyclone3-ep3c5e144 bank2 u18c cyclone3-ep3c5e144 clk2 24 clk3 25 io1 28 io2 30 io3_vref2 31 io4_rup1 32 io5_rdn1 33 io6 34 c105 47uf 0805 c105 47uf 0805 c106 4.7uf 0603 c106 4.7uf 0603 r67 * r67 * c84 0.1uf c84 0.1uf bank7 u18h cyclone3-ep3c5e144 bank7 u18h cyclone3-ep3c5e144 io1 110 io2 111 io3 112 io4 113 io5_rup4 114 io6_rdn4 115 io7_vref7 119 io8_diffiot16n 120 io9_diffiot16p 121 io10 124 io11 125 io12_diffiot12n 126 io13_diffiot12p 127 r68 * r68 * c97 0.1uf c97 0.1uf c112 22nf c112 22nf r110 10k r110 10k c83 0.1uf c83 0.1uf c92 0.1uf 0402 c92 0.1uf 0402 dc1996afb demo manual dc1996a
10 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 0414 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 user s 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 dc1996afb demo manual dc1996a
|
