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AD9119BBCZ датащи(PDF) 40 Page - Analog Devices |
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AD9119BBCZ датащи(HTML) 40 Page - Analog Devices |
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40 / 66 page ![]() AD9119/AD9129 Data Sheet Rev. B | Page 40 of 66 Figure 131 shows the DSC set and hold times with respect to the DCI signal and data signals. DCI DATA DSC tS tH Figure 131. LVDS Data Port Set and Hold Times Table 11 shows the typical times for various DAC clock frequencies that are required to calculate the data valid margin. The amount of margin that is available for tuning of the DSC sampling point can be determined using Table 11. Table 10 lists the values that are guaranteed over the operating conditions. These values were taken with 50% duty cycle and DCI swing of 450 mV p-p. For best performance, the duty cycle variation should be kept below ±5%, and the DCI input should be as high as possible, up to 800 mV p-p. Table 10. Data Port Set and Hold Time Window (Guaranteed) Frequency, fDAC (MHz) Time (ps) Data Port Set and Hold Times (ps) at DLL Phase −3 0 +3 1600 tS −272 −489 −683 tH 682 911 1120 2300 tS −168 −292 −420 tH 564 705 839 2800 tS −88 −185 −285 tH 457 559 652 Table 11. Data Port Set and Hold Time Window (Typical) Frequency, fDAC1 (MHz) Time (ps) Data Port Set and Hold Times (ps) at DLL Phase −6 −5 −4 −3 −2 −1 0 +1 +2 +3 +4 +5 +6 1400 tS −106 −205 −274 −353 −436 −523 −604 −680 −798 −906 −993 −1064 −1131 tH 426 499 571 651 730 813 900 977 1069 1152 1235 1303 1387 1500 tS −124 −197 −291 −351 −453 −524 −600 −670 −732 −815 −908 −982 −1071 tH 427 490 556 637 713 795 870 942 1025 1100 1181 1241 1320 1600 tS −120 −191 −252 −335 −402 −495 −552 −626 −704 −776 −847 −902 −978 tH 421 485 550 619 689 760 836 910 989 1049 1128 1195 1250 1700 tS −111 −184 −226 −301 −370 −442 −528 −580 −641 −719 −784 −822 −895 tH 382 429 489 549 619 700 762 825 907 970 1032 1095 1151 1800 tS −93 −133 −209 −265 −326 −401 −475 −524 −596 −646 −709 −765 −823 tH 400 442 492 555 617 677 754 816 883 950 1003 1061 1122 1900 tS −90 −139 −182 −254 −298 −359 −430 −496 −547 −593 −663 −700 −765 tH 398 443 488 535 593 664 717 778 849 900 963 1021 1070 2000 tS −82 −122 −170 −220 −272 −346 −399 −452 −517 −565 −607 −660 −713 tH 389 423 468 522 571 625 683 733 789 854 908 958 1015 2100 tS −87 −133 −161 −206 −274 −331 −384 −443 −488 −540 −586 −623 −675 tH 370 409 451 491 536 592 636 696 751 794 855 911 954 2200 tS −94 −143 −182 −245 −283 −334 −378 −427 −487 −521 −565 −604 −659 tH 415 453 487 523 571 622 673 722 778 818 859 908 956 2300 tS −93 −131 −182 −227 −270 −312 −357 −388 −439 −485 −531 −570 −623 tH 390 422 456 500 542 595 644 686 731 778 821 858 902 2400 tS −130 −156 −196 −244 −277 −313 −366 −404 −457 −496 −534 −560 −615 tH 426 459 494 529 567 607 653 698 731 769 815 862 911 2500 tS −73 −106 −142 −177 −216 −258 −308 −348 −394 −430 −458 −486 −535 tH 370 407 433 467 502 546 582 619 662 702 740 780 828 2600 tS −43 −76 −115 −145 −184 −228 −275 −306 −351 −375 −402 −443 −491 tH 338 369 396 430 466 503 535 567 614 652 690 725 766 2700 tS −54 −77 −108 −144 −179 −228 −277 −305 −336 −354 −400 −424 −471 tH 316 340 372 406 441 475 499 539 580 622 654 685 729 2800 tS −36 −72 −101 −143 −175 −208 −243 −287 −320 −347 −382 −408 −463 tH 335 355 379 404 442 480 511 545 575 607 638 676 717 1 Table 11 shows characterization data for selected fDAC frequencies. Other frequencies are possible, and Table 11 can be used to estimate performance. |
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