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ADV7120KSTZ30 датащи(PDF) 10 Page - Analog Devices |
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ADV7120KSTZ30 датащи(HTML) 10 Page - Analog Devices |
10 / 12 page ADV7120 REV. B –10– PC BOARD LAYOUT CONSIDERATIONS The ADV7120 is optimally designed for lowest noise perfor- mance, both radiated and conducted noise. To complement the excellent noise performance of the ADV7120, it is imperative that great care be given to the PC board layout. Figure 8 shows a recommended connection diagram for the ADV7120. The layout should be optimized for lowest noise on the ADV7120 power and ground lines. This can be achieved by shielding the digital inputs and providing good decoupling. The lead length between groups of VAA and GND pins should by minimized so as to minimize inductive ringing. Ground Planes The ADV7120 and associated analog circuitry, should have a separate ground plane referred to as the analog ground plane. This ground plane should connect to the regular PCB ground plane at a single point through a ferrite bead, as illustrated in Figure 8. This bead should be located as close as possible (within 3 inches) to the ADV7120. The analog ground plane should encompass all ADV7120 ground pins, voltage reference circuitry, power supply bypass circuitry, the analog output traces and any output amplifiers. The regular PCB ground plane area should encompass all the digital signal traces, excluding the ground pins, leading up to the ADV7120. GND FS ADJUST IOR IOG IOB GROUND ADV7120 C3 0.1 µF C5 0.1 µF Z1 (AD589) R1 75 Ω R2 75 Ω R3 75 Ω C1 33 µF C2 10 µF COMP C6 0.1 µF ANALOG POWER PLANE V AA V REF L2 (FERRITE BEAD) R0 R7 G0 G7 B0 B7 CLOCK REF WHITE SYNC BLANK RGB VIDEO OUTPUT VIDEO DATA INPUTS VIDEO CONTROL INPUTS ANALOG GROUND PLANE C4 0.1 µF R SET 560 Ω L1 (FERRITE BEAD) +5V (V CC ) I SYNC SET COMPONENT C1 C2 C3, C4, C5, C6 L1, L2 R1, R2, R3 Rset Z1 SET DESCRIPTION 33 µF TANTALUM CAPACITOR 10 µF TANTALUM CAPACITOR 0.1 µF CERAMIC CAPACITOR FERRITE BEAD 75 Ω 1% METAL FILM RESISTOR 560 Ω 1% METAL FILM RESISTOR 1.235V VOLTAGE REFERENCE VENDOR PART NUMBER FAIR-RITE 274300111 OR MURATA BL01/02/03 DALE CMF-55C DALE CMF-55C ANALOG DEVICES AD589JH Figure 8. ADV7120 Typical Connection Diagram and Component List |
Аналогичный номер детали - ADV7120KSTZ30 |
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Аналогичное описание - ADV7120KSTZ30 |
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