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SI5321-G-BC Datasheet(PDF) 11 Page - Silicon Laboratories |
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SI5321-G-BC Datasheet(HTML) 11 Page - Silicon Laboratories |
11 / 34 page Si5321 Rev. 2.5 11 Wander/Jitter at 1600 Hz Bandwidth (BWSEL[1:0] = 01 and BWBOOST = 0; FXDDELAY = 1) Jitter Tolerance (see Figure 9) JTOL(PP) f = 16 Hz 1000 — — ns f = 160 Hz 100 — — ns f = 1600 Hz 10 — — ns CLKOUT RMS Jitter Generation FEC[2:0] = 000 JGEN(RMS) 12 kHz to 20 MHz — 0.8 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, — 6.7 10.0 ps 50 kHz to 80 MHz, — 3.0 5.0 ps CLKOUT Peak-Peak Jitter Generation FEC[2:0] = 001, 010, 100, 101, 110, 111 JGEN(PP) 12 kHz to 20 MHz, — 6.5 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 0.1 dB Wander/Jitter at 3200 Hz Bandwidth (BWSEL[1:0] = 01 and BWBOOST = 1; FXDDELAY = 1) Jitter Tolerance (see figure 7) f = 32 Hz 500 — — ns f= 320Hz 50 — — ns f = 3200 Hz 5 — — ns CLKOUT RMS Jitter Generation FEC[2:0] = 000 JGEN(RMS) 12 kHz to 20 MHz, — 0.8 1.0 ps 50 kHz to 80 MHz, — 0.25 0.3 ps CLKOUT Peak-Peak Jitter Generation FEC[2:0] = 000 JGEN(PP) 12 kHz to 20 MHz, — 6.1 10.0 ps 50 kHz to 80 MHz, — 3.0 5.0 ps Jitter Transfer Bandwidth (see Figure 6) FBW BW = 3200 Hz — 3200 — Hz Table 4. AC Characteristics (PLL Performance Characteristics) (Continued) (VDD33 =3.3 V ±5%, TA =–20 to 85 °C) Parameter Symbol Test Condition Min Typ Max Unit 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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