5 4 3 2 1 REVISION HISTORY 3 4 4 5 6 7 8 9 10 11 12 SMA 2 3 4 5 6 C2 1000pF R3 *0603 B C9 62pF 2 4 6 8 1 3 5 7 19 DNC 20 21 22 VCC DNC +OUT * DNC GND DNC T_DIODE DNC DNC DNC GND DNC -OUT R14 * 0603 DNC U1 DNC L1 560nH C22 0.1uF T4 4 15 R19 0 14 OPT C15 1000pF C4 1000pF 13 0603 0603 17 16 * * C21 1000pF C3 1000pF 18 DNC -IN J9 3 1 -IN OPT C14 1000pF 2 L11 OPT 1008 * J10 3 * +OUT SMA 5 6 J8 1 * -OUT SMA R18 L22 OPT 1008 12 5 1 DNC * 6 11 SMA C R4 R17 8 +IN VCC JP1 HD2X6-100 OPT T3 1 DATE 08-03-12 JP2 HD2X4-100 OPT R2 348 0603 J7 C7 VCC 1000pF C8 62pF 25 * CAL OUT SMA DNC R13 APPROVED JOHN C. THIS IS A UNIVERSAL PCB, DESIGNED TO ACCOMMODATE MULTIPLE VERSIONS OF THE IC. REFER TO SIMPLIFIED SCHEMATIC IN FIGURE 3 OF DC1774A DEMO MANUAL. J6 1 10 C1 1000pF C R6 348 6 C17 1000pF GND E6 C12 62pF VCC C13 1000pF 7 GND 4 DESCRIPTION PRODUCTION D 5 GND 3 2 T2 GND J18 REV __ SEE BOM 4 3 C19 1000pF C18 1000pF 5 GND C16 1000pF 9 SMA D R5 348 24 SEE BOM 1 6 C10 62pF 23 T1 J5 CAL IN C11 1000pF +IN OPTIONAL CIRCUIT ECO * L2 560nH R1 348 0603 VCC J11 B +5V C23 0.1uF 4 6 8 3 5 7 C20 1000pF 2 NOTE: UNLESS OTHERWISE SPECIFIED 1 VCC C5 1000pF E3 +5V JP3 HD2X4-100 OPT 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE 0402. 2. ALL DNC PINS ON U1 ARE FOR LINEAR USE ONLY. * A ASSY -A -B -C ASSY -A -B -C U1 LTC6430IUF-15 LTC6430IUF-15 LTC6431IUF-15 C2,C4 1000pF, 0402 1000pF, 0402 OPT 5 FREQ. 100-300 MHz 400-1000 MHz 100-1200 MHz C5 1000pF, 0603 1000pF, 0603 OPT T3, T4 ADT2-1T+ ADTL2-18 OPT C9 62pF 62pF OPT R3, R4 R13,R14,R17,R18 J8 0 OHM OPT STUFF 0 OHM OPT STUFF OPT 0 OHM OPT C14,C15 1000pF, 0402 OPT OPT 4 C23 0.1uF 0.1uF OPT L2 560nH 560nH OPT J10 OPT OPT STUFF R1 348 348 OPT CUSTOMER NOTICE APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. 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 SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 TECHNOLOGY KIM T. JOHN C. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC IF AMP/ADC DRIVER SIZE N/A SCALE = NONE 2 DATE: IC NO. LTC643XIUF FAMILY REV. 1 DEMO CIRCUIT 1774A 08/03/2012, 03:15 PM SHEET 1 1 OF 1 A