Datasheet
AD9119/AD9129 Data Sheet
Rev. A | Page 40 of 68
Figure 131 shows the DSC set and hold times with respect to
the DCI signal and data signals.
11149-238
DCI
DATA
DSC
t
S
t
H
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,
f
DAC
(MHz)
Time (ps)
Data Port Set and Hold Times (ps)
at DLL Phase
−3 0 +3
1600 t
S
−272 −489 −683
t
H
682 911 1120
2300 t
S
−168 −292 −420
t
H
564 705 839
2800 t
S
−88 −185 −285
t
H
457 559 652
Table 11. Data Port Set and Hold Time Window (Typical)
Frequency,
f
DAC
1
(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 t
S
−106 −205 −274 −353 −436 −523 −604 −680 −798 −906 −993 −1064 −1131
t
H
426 499 571 651 730 813 900 977 1069 1152 1235 1303 1387
1500 t
S
−124 −197 −291 −351 −453 −524 −600 −670 −732 −815 −908 −982 −1071
t
H
427 490 556 637 713 795 870 942 1025 1100 1181 1241 1320
1600 t
S
−120 −191 −252 −335 −402 −495 −552 −626 −704 −776 −847 −902 −978
t
H
421 485 550 619 689 760 836 910 989 1049 1128 1195 1250
1700 t
S
−111 −184 −226 −301 −370 −442 −528 −580 −641 −719 −784 −822 −895
t
H
382 429 489 549 619 700 762 825 907 970 1032 1095 1151
1800
t
S
−93
−133
−209
−265
−326
−401
−475
−524
−596
−646
−709
−765
−823
t
H
400 442 492 555 617 677 754 816 883 950 1003 1061 1122
1900 t
S
−90 −139 −182 −254 −298 −359 −430 −496 −547 −593 −663 −700 −765
t
H
398
443
488
535
593
664
717
778
849
900
963
1021
1070
2000 t
S
−82 −122 −170 −220 −272 −346 −399 −452 −517 −565 −607 −660 −713
t
H
389 423 468 522 571 625 683 733 789 854 908 958 1015
2100
t
S
−87
−133
−161
−206
−274
−331
−384
−443
−488
−540
−586
−623
−675
t
H
370 409 451 491 536 592 636 696 751 794 855 911 954
2200 t
S
−94 −143 −182 −245 −283 −334 −378 −427 −487 −521 −565 −604 −659
t
H
415 453 487 523 571 622 673 722 778 818 859 908 956
2300 t
S
−93 −131 −182 −227 −270 −312 −357 −388 −439 −485 −531 −570 −623
t
H
390 422 456 500 542 595 644 686 731 778 821 858 902
2400 t
S
−130 −156 −196 −244 −277 −313 −366 −404 −457 −496 −534 −560 −615
t
H
426 459 494 529 567 607 653 698 731 769 815 862 911
2500 t
S
−73 −106 −142 −177 −216 −258 −308 −348 −394 −430 −458 −486 −535
t
H
370 407 433 467 502 546 582 619 662 702 740 780 828
2600 t
S
−43 −76 −115 −145 −184 −228 −275 −306 −351 −375 −402 −443 −491
t
H
338 369 396 430 466 503 535 567 614 652 690 725 766
2700 t
S
−54 −77 −108 −144 −179 −228 −277 −305 −336 −354 −400 −424 −471
t
H
316 340 372 406 441 475 499 539 580 622 654 685 729
2800 t
S
−36 −72 −101 −143 −175 −208 −243 −287 −320 −347 −382 −408 −463
t
H
335 355 379 404 442 480 511 545 575 607 638 676 717
1
Table 11 shows characterization data for selected f
DAC
frequencies. Other frequencies are possible, and Table 11 can be used to estimate performance.