Datasheet LTC6420-20 (Analog Devices) - 10

LTC6420-20
APPLICATIONS INFORMATION Figure 4a. Top Silkscreen of DC1299, Test Circuit A
V+ R1 1.21k TD4 1% VOCMA EN R2 V+ A TD5 C16 V+ 1k JP1 GND 0.1μF 1 1% C18 C19 2 DIS C22 C21 0.1μF 0.1μF C30 J1 0.1μF 3 EN C17 [1] 0.1μF R3 1 2 [1] J3 +INA 1.5k 1 2 R4 5 T1 1 R5 +OUTA C25 1% 88.7 T2 [2] 3 4 0.1μF 20 19 18 17 2 R7 U1 R5 R5 2 EN C22 OPT V+A VOCMA B +OUTA [2] 88.7 [1] C34 [1] • • 1 5 J2 4 3 R9 [1] 1 16 TCM4-19+ J4 1 2 [2] [2] +INA –OUTA V+ –INA 1 2 C22 C43 –OUTA 2 15 0.1μF C28 –INA V+A C35 0.1μF 0.1μF 1000pF 3 14 V– V– LTC6420-20 1 2 C31 4 13 C35 V– V– [1] C30 C39 C32 [1] J5 0.1μF C32 J6 5 12 0.1μF 0.1μF 1 2 1 2 –INB –INB V+B 1000pF –OUTB 5 T3 1 R10 C34 T4 6 11 3 4 [2] 0.1μF +INB –OUTB R12 2 R11 R14 2 V– V+B VOCMB ENA +OUTB 88.7 C30 OPT [1] C40 1 5 0.1μF • • 21 7 8 9 10 J7 4 3 R12 0.1μF TCM4-19+ J8 V+ ENB R15 1 2 [2] [2] R17 1 2 +INB 1.5k JP2 88.7 C44 +OUTB C22 1 C41 V+ 1% 0.1μF [1] V+ 2 DIS [1] R16 C18 C19 3 EN 1.21k 0.1μF 0.1μF NOTES: UNLESS OTHERWISE SPECIFIED TD1 1% [1] DO NOT STUFF VOCMB V+ R18 C42 [2] TD2
VERSION U1 R5, R9, R10, R13 T1, T3
1k 0.1μF V+ –C LTC6420CUDC-20 NONE TCM4-19+ 1% 2.85V TO C14 C15 –G LTC6421CUDC-20 NONE TCM4-19+ 3.5V 4.7μF 1μF 642020 F04b TD3 GND
Figure 4b. Demo Circuit 1299 Schematic (Test Circuit A)
642020fb 10 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION SELECTOR GUIDE DC ELECTRICAL CHARACTERISTICS AC ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS