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CDCVF857 数据表(PDF) 11 Page - Texas Instruments |
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CDCVF857 数据表(HTML) 11 Page - Texas Instruments |
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11 / 19 page ![]() CDCVF857 2.5V PHASELOCK LOOP CLOCK DRIVER SCAS047D − MARCH 2003 − REVISED JUNE 2005 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION 1 fo Yx, FBOUT Yx, FBOUT Yx, FBOUT Yx, FBOUT tc(n) tjit(per) = tcn − 1 fo fO = Average input frequency measured at CLK/CLK Figure 7. Period Jitter tjit(hper) = t(hper_n) − t(hper_n) t(hper_n+1) Yx, FBOUT Yx, FBOUT 1 fo 1 2xfo fO = Average input frequency measured at CLK/CLK n = any half cycle Figure 8. Half-Period Jitter Clock Inputs and Outputs 80% 20% 80% 20% tr tf t slr(I O) + V 80% * V 20% t r(I O) t slf(I O) + V 80% * V 20% t f(I O) VOH, VIH VOL, VIL Figure 9. Input and Output Slew Rates |
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