5 4 3 2 1 REVISION HISTORY ECO J11 V+ 3.15V - 3.45V REV DESCRIPTION APPROVED DATE 2 PRODUCTION MICHEL A. 10-03-13 __ V+ V+ E10 3.15V - 3.45V + C16 D 22uF 10V 3528 E11 GND C14 1uF 0603 C15 0.01uF 0201 C17 0.01uF 0201 C18 0.01uF 0201 C19 0.01uF 0201 C20 0.01uF 0201 C21 0.01uF 0201 C25 0.01uF 0201 C26 0.01uF 0201 C27 0.01uF 0201 C8 0.1uF C9 0.1uF C10 0.1uF C12 0.1uF C13 0.1uF C22 0.1uF C23 0.1uF C24 0.1uF C28 0.1uF C29 0.1uF D J10 GND V+ R31 OPT 0603 CS SDO R32 OPT 0603 27 R16 OPT V+ J9 28 R19 OPT IN- 29 C2 0.1uF 30 13 GND V+A OUT1+ V+IN OUT1- GND V+OUT1 IN+ V+OUT2 IN- OUT2+ GND OUT2- V+IN V+OUT2 TEMP 31 B J2 Z2 * OUT0SEL 15 14 16 V+OUT1 R20 49.9 SMA-R GND R4 0 OUT0SMA-R C 12 R7 0 11 Z3 10 J3 * OUT1+ R8 OPT 9 8 SMA-R R6 GND * 7 R9 0 6 Z4 5 J4 * OUT1- R10 OPT 4 3 SMA-R R12 0 2 Z5 1 J5 * OUT2+ R13 OPT SMA-R R11 * GND 26 R1 GND R14 0 Z6 37 25 R18 49.9 SMA-R 24 V+OUT0 V+A OUT2SEL R35 200K SYNC GND IN+ C1 0.1uF OUT0+ 36 R17 OPT 23 OUT0+ SMA-R R5 OPT OUT0- 32 J8 22 J1 Z1 * R3 OPT * V+OUT0 V+D 35 V+ SDI V+A 21 * QFN36UFF-4X7 SCLK 34 SDI 20 OUT1SEL 19 GND SCLK U1 33 C CS SMA V+A V+D SYNC SDO 18 J7 17 E9 SYNC R2 0 OUT0SEL V+ J6 * R15 OPT TEMP SMA-R E12 V+ V+ R29 OPT 0603 E13 GND R27 OPT 0603 OUT1SEL R30 OPT 0603 NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0402 ALL CAPACITORS ARE IN MICROFARADS, 0402 A B OUT2- * ASSY U1 R1 R6 -A -B -C -D LTC6954IUFF-1 LTC6954IUFF-2 LTC6954IUFF-3 LTC6954IUFF-4 OPEN OPEN OPEN OPEN OPEN OUT2SEL R28 OPT 0603 OUT0SEL 1 2 3 H L Z1-Z2 Z3-Z4 OPEN 0.1uF 0.1uF 0.1uF 100 OHM 0.1uF 0.1uF 0 OHM 0 OHM 0 OHM 0 OHM 0 OHM 100 OHM 100 OHM 0.1uF 100 OHM 100 OHM 100 OHM 0 OHM Z5-Z6 4 OUT0SEL 1 2 3 H L V+ OUT2SEL OUT1SEL JP2 1 2 3 H L V+ OUT2SEL JP3 APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. KIM T. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL TITLE: SCHEMATIC APP ENG. MICHEL A. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only LOW PHASE NOISE, TRIPLE OUTPUT CLOCK DISTRIBUTION DIVIDER/ DRIVER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 OUT1SEL JP1 CUSTOMER NOTICE R11 V+ 3 N/A SCALE = NONE 2 DATE: IC NO. LTC6954IUFF-1/-2/-3/-4 REV. 2 DEMO CIRCUIT 1954A 10/03/2013, 10:30 AM SHEET 1 1 OF 2 A 5 4 3 2 1 DC590 SPI INTERFACE V+ D 1 V+ 2 5V 6 CS 4 SCK/SCL 7 MOSI/SDA 5 MISO 10 EEVCC 9 EESDA 11 EESCL 12 EEGND 14 AUX 3 4 R33 100 R23 4.99K C3 0.1uF 1 C7 0.1uF VCC(A) VCC(B) 2 GND 3 R26 0 0603 EEGND SDI C U4 74LVC1T45GW R40 100 WP 4 R36 100 V+ C5 0.1uF V+ C6 0.1uF 2 GND VCC 5 4 ARRAY SCL SDA WP A2 A1 A0 EEPROM 13 8 3 6 5 7 3 2 1 3 SCLK C4 0.1uF 8 R24 4.99K R38 200K 6 VCC R25 4.99K R39 200K 1 D CS R34 100 U3 NC7WZ17P6X U5 24LC025-I /ST B 6 2 GND VCC 5 V+DIG CS SCLK SDI SDO GND GND GND C 1 V+ GND J12 HD2X7-079-MOLEX U2 NC7WZ17P6X R22 200K DIR 6 5 4 SDO B R37 200K NOTE: EEPROM FOR BOARD IDENTIFICATION CUSTOMER NOTICE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. KIM T. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. MICHEL A. TITLE: SCHEMATIC APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT LOW PHASE NOISE, TRIPLE OUTPUT PERFORMANCE OR RELIABILITY. CONTACT LINEAR DISTRIBUTION DIVIDER/ DRIVER TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 IC NO. DATE: REV. LTC6954IUFF-1/-2/-3/-4 N/A SCALE = NONE A CLOCK 2 DEMO CIRCUIT 1954A 10/03/2013, 10:30 AM SHEET 2 1 2 OF 2