5 4 3 2 1 REVISION HISTORY ECO REV __ 1 DESCRIPTION PROTOTYPE APPROVED JOHN C. DATE 01-27-14 D D C1 1000pF 0603 IN VCC C5 1000pF C2 62pF VCC P20 R1 348 P21 L2 0 0603 C3 1000pF 0603 C4 0.1uF 0603 P19 19 DNC 21 20 DNC 23 22 VCC DNC IN DNC 14 E1 13 P10 C8 1000pF B T_DIODE VCC E2 12 11 7 C E3 VCC OUT 16 DNC DNC DNC GND J2 15 DNC DNC DNC 6 DNC DNC P6 18 T_DIODE LTC6431-20 C7 1000pF 0603 17 GND U1 DNC VCC P5 5 DNC 10 P4 4 L1 C6 560nH OPT 0603 OUT 9 P3 3 DNC GND P2 C 2 8 1 P1 GND 25 GND 24 J1 VCC 4.75V - 5.25V GND P12 P11 B NOTE: UNLESS OTHERWISE SPECIFIED CUSTOMER NOTICE 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE 0402. A 2. ALL DNC PINS ON U1 ARE FOR FACTORY USE ONLY 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. 5 4 APPROVALS 3 TECHNOLOGY AK. JOHN C. TITLE: SCHEMATIC 50 Ohm 20dB GAIN BLOCK SIZE IC NO. N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only REV. LTC6431-20 1 DEMO CIRCUIT 2077A Monday, January 27, 2014 DATE: 2 SHEET 1 1 OF 1 A