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GS2985 Datasheet(PDF) 12 Page - Semtech Corporation |
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GS2985 Datasheet(HTML) 12 Page - Semtech Corporation |
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12 / 45 page  GS2985 Multi-Rate SDI Reclocker with Equalization & De-emphasis Data Sheet 36663 - 5 July 2012 12 of 45 Proprietary & Confidential Output De-Emphasis − OFF - 0 − 0 − dB − ON - 0 − 0 − dB − ON - 1 − 0.7 − dB − ON - 2 − 1.3 − dB − ON - 3 − 2 − dB − ON - 4 − 2.6 − dB − ON - 5 − 3.3 − dB − ON - 6 − 4 − dB − ON - 7 − 4.7 − dB − Input Jitter Tolerance square-wave modulated jitter 0.8 −− UI − Loop Bandwidth BWLOOP (270Mb/s) KBB = VCC − 170 − kHz − KBB = FLOAT − 340 − kHz − KBB = GND − 680 − kHz − BWLOOP (1485Mb/s) KBB = VCC − 0.875 − MHz − KBB = FLOAT − 1.75 − MHz − KBB = GND − 3.5 − MHz − BWLOOP (2970Mb/s) KBB = VCC − 1.75 − MHz − KBB = FLOAT − 3.5 − MHz − KBB = GND − 7.0 − MHz − PLL Lock Time (asynchronous) talock −− 0.5 1 ms − PLL Lock Time (synchronous) tslock CLF = 47nF, SD/HD = 0 − 0.5 4 μs − CLF = 47nF, SD/HD = 1 − 510 μs − Serial Data Output Jitter Intrinsic (DDO0) tOJ(270Mb/s) KBB = FLOAT PRN 2^23-1 test pattern − 0.01 0.02 UI 1 tOJ(1485Mb/s) KBB = FLOAT PRN 2^23-1 test pattern − 0.03 0.04 UI 1 tOJ(2970Mb/s) KBB = FLOAT PRN 2^23-1 test pattern − 0.05 0.08 UI 1 Output Rise/Fall Time tr/f 20% to 80% (400mV swing) − 65 90 ps − 20% to 80% (800mV swing) − 80 110 ps − Output Rise/Fall Time Mismatch −− − − 15 ps − Table 2-2: AC Electrical Characteristics (Continued) Parameter Symbol Conditions Min Typ Max Units Notes |
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