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ADV3201ASWZ Datasheet(PDF) 35 Page - Analog Devices |
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ADV3201ASWZ Datasheet(HTML) 35 Page - Analog Devices |
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35 / 36 page ![]() ADV3200/ADV3201 Rev. 0 | Page 35 of 3 6 OUTxx INxx 75Ω ADV3200/ ADV3201 Figure 106. Fly-By Input Termination (Grounds for the Two Transmission Lines Must Be Tied Together Close to the INxx Pin) If multiple ADV3200/ADV3201s are to be driven in parallel, a fly-by input termination scheme is very useful, but the distance from each ADV3200/ADV3201 input to the driven input transmission line is a stub that should be minimized in length and parasitics using the discussed guidelines. Although the examples discussed so far are for input termination, the theory is similar for output back termination. Taking the ADV3200/ADV3201 as an ideal voltage source, any distance of routing between the ADV3200/ADV3201 and a back-termination resistor is a stub that creates reflections. For this reason, place back-termination resistors close to the ADV3200/ADV3201. In practice, because back-termination resistors are series elements, their footprint in the routing is narrower, and it is easier to place them close to the ADV3200/ ADV3201 outputs in board layout. ADV3200/ADV3201 CLK, DATA IN, DATA OUT, UPDATE, CS, RESET [CLK, DATA IN, DATA OUT, UPDATE, CS, RESET] 0402 75Ω 75Ω BNC IN[2:0], OSD[24:22], OSD[18:16] 0402 75Ω 75Ω RCA IN[5:3], OSD[21:19] 0402 50Ω 50Ω SMA IN[8:6], OSD[30:28] OSD[27:25] 0402 75Ω 75Ω RCA IN[31:9], OSD[31], OSD[15:0] 75Ω 6 USB DIGITAL CONTROL FROM PC VPOS VNEG DVCC DGND 75Ω 75Ω TEST POINT OUT[15:0] OUT[31], OUT[15:0] OUT[18:16] 86.6Ω 150Ω 75Ω 464Ω BNC AD8003 464Ω OUT[21:19] OUT[24:22] 150Ω 75Ω 464Ω RCA AD8003 464Ω 75Ω BNC 75Ω OUT[27:25] 75Ω RCA 75Ω OUT[30:28] 50Ω SMA 43Ω 75Ω VCLAMP OSDS[31:0] OSDS[24:22] VREF TEST POINT TEST POINT BNC OSDS[18:16] 1kΩ 2kΩ OSDS[31:0] TO HIGH SPEED BREAKOUT PADS FOR VCLAMP CAPS 10nF 1nF 100nF 10nF 1nF 100nF TEST POINT Figure 107. Evaluation Board Simplified Schematic |
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