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CDC421A212RGET 데이터시트(PDF) 5 Page - Texas Instruments |
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CDC421A212RGET 데이터시트(HTML) 5 Page - Texas Instruments |
5 / 15 page JITTER CHARACTERISTICS IN INPUT CLOCK MODE CDC421Axxx PhaseNoise Analyzer 150 W XIN1 XIN2 50 W 150 W 100pF 0.1pF 50 W CDC421AXXX www.ti.com ....................................................................................................................................................................................................... SCAS875 – MAY 2009 Jitter characterization tests are performed using an LVCMOS input signal driving the CDC421Axxx device, as Figure 2 illustrates. Figure 2. Jitter Test Configuration for an LVTTL Input Driving CDC421Axxx When the CDC421Axxx is referenced by an external, clean LVCMOS input of 31.25 MHz, 33.33 MHz, and 35.4167 MHz, Table 1 to Table 7 list the measured SSB phase noise of all the outputs supported by the CDC421Axxx device (100 MHz, 106.25 MHz, 125 MHz, 156.25 MHz, 212.5 MHz, 250 MHz, and 312.5 MHz) from 100 Hz to 20 MHz from the carrier. Table 1. Phase Noise Data with LVCMOS Input of 33.3333 MHz and LVPECL Output at 100.00 MHz(1) PARAMETER MIN TYP MAX UNIT phn100 Phase noise at 100 Hz –111 dBc/Hz phn1k Phase noise at 1 kHz –121 dBc/Hz phn10k Phase noise at 10 kHz –131 dBc/Hz phn100k Phase noise at 100 kHz –133 dBc/Hz phn1M Phase noise at 1 MHz –142 dBc/Hz phn10M Phase noise at 10 MHz –149 dBc/Hz phn20M Phase noise at 20 MHz –149 dBc/Hz JRMS RMS jitter integrated from 12 kHz to 20 MHz 507 fs Tj Total jitter 35.33 ps Dj Deterministic jitter 11.54 ps (1) Phase noise specifications under following conditions: input frequency = 33.3333 MHz, output frequency = 100.00 MHz. Table 2. Phase Noise Data with LVCMOS Input of 35.4167 MHz and LVPECL Output at 106.25 MHz(1) PARAMETER MIN TYP MAX UNIT phn100 Phase noise at 100 Hz –112 dBc/Hz phn1k Phase noise at 1 kHz –121 dBc/Hz phn10k Phase noise at 10 kHz –125 dBc/Hz phn100k Phase noise at 100 kHz –129 dBc/Hz phn1M Phase noise at 1 MHz –142 dBc/Hz phn10M Phase noise at 10 MHz –151 dBc/Hz phn20M Phase noise at 20 MHz –151 dBc/Hz JRMS RMS jitter integrated from 12 kHz to 20 MHz 530 fs Tj Total jitter 30.39 ps Dj Deterministic jitter 11 ps (1) Phase noise specifications under following conditions: input frequency = 35.4167 MHz, output frequency = 106.25 MHz. Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 5 |
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