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SI5321-G-BC Arkusz danych(PDF) 10 Page - Silicon Laboratories |
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SI5321-G-BC Arkusz danych(HTML) 10 Page - Silicon Laboratories |
10 / 34 page Si5321 10 Rev. 2.5 Table 4. AC Characteristics (PLL Performance Characteristics) (VDD33 =3.3 V ±5%, TA =–20 to 85 °C) Parameter Symbol Test Condition Min Typ Max Unit Wander/Jitter at 800 Hz Bandwidth (BWSEL[1:0] = 10 and BWBOOST = 0; FXDDELAY = 1) Jitter Tolerance (see Figure 7) JTOL(PP) f=8 Hz 1000 — —ns f= 80 Hz 100 — —ns f= 800Hz 10 — —ns CLKOUT RMS Jitter Generation FEC[2:0] = 000 JGEN(RMS) 12 kHz to 20 MHz — 0.9 1.2 ps 50 kHz to 80 MHz — 0.27 0.35 ps CLKOUT RMS Jitter Generation FEC[2:0] = 001, 010, 100, 101, 110, 111 JGEN(RMS) 12 kHz to 20 MHz — 0.9 1.2 ps 50 kHz to 80 MHz — 0.27 0.35 ps CLKOUT Peak-Peak Jitter Generation FEC[2:0] = 000 JGEN(PP) 12 kHz to 20 MHz — 7.6 11 ps 50 kHz to 80 MHz — 3.6 10.0 ps CLKOUT Peak-Peak Jitter Generation FEC[2:0] = 001, 010, 100, 101, 110, 111 JGEN(PP) 12 kHz to 20 MHz — 6.7 9.2 ps 50 kHz to 80 MHz — 3.0 10.0 ps Jitter Transfer Bandwidth (see Figure 6) FBW BW = 800 Hz — 800 — Hz Wander/Jitter Transfer Peaking JP < 800 Hz — 0.0 0.05 dB Wander/Jitter at 1600 Hz Bandwidth (BWSEL[1:0] = 10 and BWBOOST = 1; FXDDELAY = 1) Jitter Tolerance (see Figure 7) f = 16 Hz 500 — — ns f= 160Hz 50 — — ns f = 1600 Hz 5 — — ns CLKOUT RMS Jitter Generation FEC[2:0] = 000 JGEN(RMS) 12 kHz to 20 MHz — .80 1.0 ps 50 kHz to 80 MHz — .25 .30 ps CLKOUT Peak-Peak Jitter Generation FEC[2:0] = 000 JGEN(PP) 12 kHz to 20 MHz — 6.4 10.0 ps 50 kHz to 80 MHz — 3.0 5.0 ps Jitter Transfer Bandwidth (see Figure 6) FBW BW = 1600 Hz — 1600 — Hz Wander/Jitter Transfer Peaking JP < 1600 Hz — 0.0 0.05 dB Notes: 1. Higher PLL bandwidth settings provide smaller clock output wander with temperature gradient. 2. For reliable device operation, temperature gradients should be limited to 10 °C/min. 3. Telcordia GR-1244-CORE requirements specify maximum phase transient slope during clock rearrangement in terms of nanoseconds per millisecond. The equivalent ps/ s unit is used here since the maximum phase transient magnitude for the Si5321 (tPT_MTIE) never reaches one nanosecond. |
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