5 4 3 2 1 REVISION HISTORY VDD ECO R17 100 0201 CLARENCE M. GND 10 1% 1 2 3 4 0.01uF R39 33.2 1% 10 1% C51 R28 OPT 2 R27 OPT 4.7pF 4 C9 C10 8.2pF 8.2pF 1 R40 33.2 1% C7 0.01uF R83 OPT R82 OPT C23 R59 AIN1+ R20 100 0201 2.2uF 10 1% R10 VDD 10 1% R60 C11 OPT C13 C20 C12 0.1uF 0.01uF 0.1uF VCM1 C CN1 2.2uF C15 0.1uF 1 8 2 7 3 6 4 5 *U2 VCM1 49.9 1% AIN1+ AIN1- C21 PAR/SER AIN2+ AIN2- 0.1uF PAR/SER VCM2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VDD VCM1 GND AIN1+ AIN1GND REFH REFL REFH REFL PAR/SER AIN2+ AIN2GND VCM2 VDD 24 R21 100 0201 D1_4_5+ D1_4_5D1_2_3+ D1_2_3D1_0_1+ D1_0_1OVDD OGND CLKOUT+ CLKOUTD2_14_15+ D2_14_15D2_12_13+ D2_12_13D2_10_11+ D2_10_11- 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 R66 L6 T5 MABAES0060 5 3 T4 MABA-007159-000000 5 1 2 4 3 56uH AIN2 0.01uF R67 33.2 1% C62 R32 OPT 2 OVDD R62 100 0201 0.1uF R61 100 0201 1 R70 33.2 1% C57 0.01uF R31 OPT 8.2pF R71 AIN2+ 10 1% 10 1% VCM2 49.9 1% OPT C65 C66 C67 0.01uF 0.1uF 0.1uF BEAD 8 7 6 5 R46 100 1% R76 100 0201 3 22 27 46 13 24 EN12 EN34 EN56 EN78 EN IN1IN1+ IN2+ IN2IN3IN3+ IN4+ IN4IN5IN5+ IN6+ IN6IN7IN7+ IN8+ IN8VBB OUT1OUT1+ OUT2+ OUT2OUT3OUT3+ OUR4+ OUT4OUT5OUT5+ OUT6+ OUT6OUT7OUT7+ OUT8+ OUT8- T3 5 C60 OPT A C59 4 OPT MABA-007159-000000 0.01uF J4 1 2 3 R2 49.9 1% R1 49.9 1% R51 OPT 0.01uF C27 0.1uF VCC_IN 1 2 3 4 SCL SCL SHT 2 SCL SDA SDA SHT 2 NOTES: UNLESSOTHERWISE SPECIFIED, 1. ALL CAPACITORS AND RESISTORS ARE 0402. R79 0 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. R52 OPT R54 0 R55 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 R25 4.99K 1% SDA 100 1% 0 U1 24LC025-I/ST 8 A0 VCC 7 A1 WP 6 A2 SCL 5 A3 SDA R26 4.99K 1% CUSTOMER NOTICE R4 OPT R53 0 VSS OPT C3 ENCC1 +3.3V FAST DAACS BOARD ID CIRCUITRY 45 44 43 42 41 40 39 38 35 34 33 32 31 30 29 28 R78 0 R50 VCC_IN R29 4.99K 1% B 1 2 23 36 37 R5 J3 SDA R24 100K 4 5 6 7 8 9 10 11 14 15 16 17 18 19 20 21 R75 100 0201 R49 OPT ENC+ VSS SCL R68 100 0201 R48 0 C2 0.01uF C OUT-ENABLE1 C61 0.01uF R47 0 RIN+ VCC DOUT+ DOUT- 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 +3.3V R77 100 0201 VDD L5 RINGND EN GND FIN1101K8X OUT-ENABLE1 R74 C16 R64 100 0201 R72 100 0201 R73 B 1 2 3 4 U8 FIN1108 CS SCK SDI C64 8.2pF R84 OPT 65 R69 100 0201 SHT 2 C63 R85 OPT PAD U7 OUT-ENABLE1 ENC+ ENCCS SCK SDI 4 R56 86.6 1% 12 25 26 47 48 +3.3V 10 1% 4.7pF R57 86.6 1% 45 44 43 42 41 40 39 38 35 34 33 32 31 30 29 28 C56 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 C58 VDD AIN2- VDD ENC+ ENCCS SCK SDI D2_0_1D2_0_1+ S2_2_3S2_0_3+ D2_4_5D2_4_5+ D2_6_7D2_6_7+ D2_8_9D2_8_9+ 10 1% VBB OUT1OUT1+ OUT2+ OUT2OUT3OUT3+ OUR4+ OUT4OUT5OUT5+ OUT6+ OUT6OUT7OUT7+ OUT8+ OUT8- R23 100 0201 R22 100 0201 R63 R65 86.6 1% IN1IN1+ IN2+ IN2IN3IN3+ IN4+ IN4IN5IN5+ IN6+ IN6IN7IN7+ IN8+ IN8- 1 2 23 36 37 R44 86.6 1% 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 R36 86.6 1% 4 5 6 7 8 9 10 11 14 15 16 17 18 19 20 21 D 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 12 25 26 47 48 5 AIN1 T2 MABAES0060 5 3 R30 100 0201 P1 EN12 EN34 EN56 EN78 EN VC1 VC2 VC3 VC4 VC5 56uH OUT-ENABLE1 R16 100 AIN1- VDO SENSE VREF SDO OF2_1+ OF2_1D1_14_15+ D1_14_15D1_12_13+ D1_12_13D1_10_11+ D1_10_11D1_8_9+ D1_8_9D1_6_7+ D1_6_7- L1 R58 3 22 27 46 13 VE1 VE2 VE3 VE4 VE5 T1 MABA-007159-000000 C6 SD0 R9 R45 86.6 1% R19 100 0201 VC1 VC2 VC3 VC4 VC5 U3 FIN1108 SHT 2 SD0 VE1 VE2 VE3 VE4 VE5 2.2uF TP4 J2 APPROVED 01/31/11 +3.3V C17 SHT 2 DATE PRODUCTION R18 100 0201 EXT REF J1 DESCRIPTION 4 R14 1K TP1 D REV 4 3 2 CONTRACT NO. APPROVALS TECHNOLOGY PCB DES. MI ENG. CLARENCE M. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC 2-CHANNEL, HIGH SPEED LOW POWER ADC FAMILY, LVDS SIZE B DATE: IC NO. LTC21XXCUP FAMILY DEMO CIRCUIT 1620A Tuesday, March 15, 2011 SHEET 1 REV 4 1 OF 2 A 5 4 VDD VDD VDD 3 VDD 2 VDD +3.3V * +3.3V JP3 1 PAR 2 SER PAR/SER 3 EN DIS JP4 1 2 EN CS 3 SDI 3 EN 2 LVDS 3 DIS SHDN 1 SD0 2 1 SCK 3 CMOS NAP SCL SDA 2 4 3 8 6 7 9 LVDS/CMOS INT SCL SDA NC NC A0 A1 A2 P0 P1 P2 P3 P4 P5 P6 P7 NC NC RN2 1 2 3 4 10 11 12 14 16 17 19 20 18 13 33 8 7 6 5 SCK SDI SD0 CS C74 C68 C69 22pF 22pF 22pF VIN VDD OVDD VDD U4 TP2 C 7 8 TP3 GND U2 SAMPLE RATE No. of BITS FREQUENCY R -A LTC2185CUP 125Msps 16 5MHz < AIN < 140MHz -B LTC2184CUP 105Msps 16 5MHz < AIN < 140MHz -C LTC2183CUP 80Msps 16 5MHz < AIN < 140MHz -D LTC2182CUP 65Msps 16 5MHz < AIN < 140MHz -E LTC2181CUP 40Msps 16 5MHz < AIN < 140MHz -F LTC2180CUP 25Msps 16 5MHz < AIN < 140MHz -G LTC2145-14CUP 125Msps 14 5MHz < AIN < 140MHz -H LTC2144-14CUP 105Msps 14 5MHz < AIN < 140MHz -I LTC2143-14CUP 80Msps 14 5MHz < AIN < 140MHz -J LTC2142-14CUP 65Msps 14 5MHz < AIN < 140MHz -K LTC2141-14CUP 40Msps 14 5MHz < AIN < 140MHz -L LTC2140-14CUP 25Msps 14 5MHz < AIN < 140MHz -M LTC2145-12CUP 125Msps 12 5MHz < AIN < 140MHz -N LTC2144-12CUP 105Msps 12 5MHz < AIN < 140MHz -O LTC2143-12CUP 80Msps 12 5MHz < AIN < 140MHz -P LTC2142-12CUP 65Msps 12 5MHz < AIN < 140MHz -Q LTC2141-12CUP 40Msps 12 5MHz < AIN < 140MHz -R LTC2140-12CUP 25Msps 12 5MHz < AIN < 140MHz D L2 V+ 4.5V - 6V ASSY 15 PAR/SER CS SDI SD0 SCK SCL SDA SHT 2 R6 10k U5 PCF8574TS/3 JP6 1 2 DIS R81 1K JP5 1 DUTY CYCLE STAB. PAR/SER R80 1K 5 JP2 D R35 1K VDD R34 1K GND R33 1K 1 C24 C14 4.7uF 0603 1uF 0603 6 VIN VIN VOUT VOUT VOUT VOUT 1 2 3 9 C54 10uF 0805 NC C72 1uF 0603 BEAD L4 R11 3k 1% BEAD 5 TP5 VCTRL SET 4 C26 0.1uF 0603 C18 C19 C33 C70 C71 0.1uF 0603 0.1uF 0603 OPT 0603 OPT 0603 OPT 0603 C37 R7 0.1uF 180k 1% GND LT3080EDD +3.3V U6 +3.3V L3 7 8 C22 1uF 0603 6 5 VIN VIN VOUT VOUT VOUT VOUT 1 2 3 9 C55 10uF 0805 NC VCTRL SET 4 C C73 1uF 0603 BEAD R12 3k 1% C28 C29 C30 C31 C32 C34 C35 C36 C75 C76 0.1uF 0603 0.1uF 0603 0.1uF 0603 0.1uF 0603 0.1uF 0603 0.1uF 0603 0.1uF 0603 0.1uF 0603 0.1uF 0603 0.1uF 0603 R8 330k 1% LT3080EDD B B A USED TO MANUFACTURE PCB MH1 MH2 MH3 MH4 1 1 1 1 REPRESENTS STAND OFFS 5 4 3 CUSTOMER NOTICE CONTRACT NO. 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. APPROVALS THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 TECHNOLOGY PCB DES. MI ENG. CLARENCE M. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC 2-CHANNEL, HIGH SPEED LOW POWER ADC FAMILY, LVDS SIZE N/A DATE: IC NO. LTC21XXCUP FAMILY DEMO CIRCUIT 1620A Wednesday, May 11, 2011 SHEET 1 REV 2 4 OF 2 A