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IDT5V9885CNLGI Datasheet(PDF) 9 Page - Integrated Device Technology |
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IDT5V9885CNLGI Datasheet(HTML) 9 Page - Integrated Device Technology |
9 / 39 page 9 INDUSTRIALTEMPERATURERANGE IDT5V9885C 3.3V EEPROMPROGRAMMABLECLOCKGENERATOR Modulation frequency: FPFD = FIN / D (Eq. 11) FVCO = FPFD * MNOM (Eq. 12) FSSC = FPFD / (4 * Nssc * Tssc) (Eq. 13) Spread: Σ∆ = SD0 + SD1 + SD2 + … + SD11 the number of samples used depends on the NSSC value Σ∆ ≤ 63 - SS_OFFSET ±Spread% = Σ∆ * 100 (Eq. 14) 64 * (2*N[11:0] + A{3:0} + 1) ±Max Spread% / 100 = 1 / MNOM or 2 / MNOM (X2=1) Profile: Waveform starts with SS_OFFSET, SS_OFFSET + SDJ, SS_OFFSET + SDJ+1, etc. Spread Spectrum Using Sinusoidal Profile Σ∆ = 63 (SS_OFFSET = 0) |
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