5 4 3 2 1 REVISION HISTORY R5 150 0.1% ECO REV DESCRIPTION APPROVED - 2 PRODUCTION FAB JOHN C. DATE 06-02-10 C22 1.3pF V+ E Pd 4 R13 OPT P CT 2 S 1 C25 0.1uF C24 TCM4-19 1:4 Xfmr by Mini-Circuits 150 0.1% 0.1uF R12 300 V+ VOCM 6 -IN E4 R16 OPT 2 C29 0.1uF C19 7 +OUT R4 100 0.1uF 3 T2 S CT Sd P 4 Pd 6 TCM4-19 1:4 Xfmr by Mini-Circuits J2 R1 R2 OPT 0 Ohm SMA OUT C27 1.3pF D R17 10 SHDN1 1 DIS 1 0.1uF VOCM C28 0.1uF C18 C26 0.1uF C32 0.1uF E2 4 9 5 R11 300 VOCM D +IN VCM VCM R15 OPT V+ V+ R10 -OUT 2 R3 100 VVV- 6 Sd 3 1 8 10 11 SMA T1 R9 150 0.1% SHDN IN C23 0.1uF 3 J1 R14 0 Ohm U1 LTC6409UDB E 2 EN R8 150 0.1% 3 JP1 CALIBRATION PATH R21 75 C31 J3 CAL IN R18 0 Ohm C T3 6 R19 OPT SMA 4 Pd P Sd 3 CT 2 S 1 0.1uF C30 0.1uF R20 300 0.1uF R22 300 R24 75 C20 TCM4-19 1:4 Xfmr by Mini-Circuits C14 0.1uF R23 300 C21 0.1uF C15 R27 0 Ohm T4 S 2 CT 3 Sd P 4 Pd 6 TCM4-19 1:4 Xfmr by Mini-Circuits 0.1uF R25 300 1 J4 CAL OUT C R26 OPT SMA R28 C1 100pF C2 0.01uF C3 0.1uF C4 0.47uF C5 100pF C6 0.01uF C7 0.1uF C8 0.47uF 150 0.1% C13 V+ 1.3pF V+ B IN+ SMA V+ V+ 2 150 0.1% R32 OPT VOCM R39 INSMA R37 0 Ohm +IN VOCM 6 -IN C16 0.1uF 3 J6 R38 OPT -OUT 5 150 0.1% R36 0 Ohm +OUT 1 R34 50 7 SHDN2 1 DIS 50 GND R7 0 Ohm SMA 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. JP2 5 J8 OUT+ R6 OPT R29 150 0.1% 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 B E3 R40 R30 10 2 EN OUTSMA C17 1.3pF A C9 C12 C11 C10 10uF 0.1uF 1000pF 1000pF J7 R35 OPT VVV- R33 8 10 11 R31 0 Ohm SHDN J5 4 9 U2 LTC6409UDB V+ 2.7V - 5.25V E1 3 2 APPROVALS TECHNOLOGY PCB DES. NC APP ENG. 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 DIFFERENTIAL AMPLIFIER / ADC DRIVER SIZE N/A SCALE = NONE DATE: IC NO. REV. LTC6409UDB DEMO CIRCUIT 1591A Thursday, June 24, 2010 2 SHEET 1 1 OF 1 A