Datasheet

AD9553
Rev. A | Page 12 of 44
5
–30
–25
–20
–15
–10
–5
0
10 1k100
MAGNITUDE (dB)
FREQUENCY OFFSET (Hz)
08565-028
JITTER TRANSFER
MAGNITUDE (dB)
FREQUENCY OFFSET (Hz)
2
1
0
–1
–2
–3
0 25 50 75 100 125 150 175
JITTER PEAKING
Figure 9. Jitter Transfer, Loop Bandwidth = 170 Hz
10
–60
–50
–40
–30
–20
–10
0
1k 10k 100k 1M
MAGNITUDE (dB)
FREQUENCY OFFSET (Hz)
08565-311
JITTER TRANSFER
Figure 10. Jitter Transfer, Loop Bandwidth = 20 kHz
5
–45
–25
–40
–35
–30
–20
–15
–10
–5
0
10 1k100
MAGNITUDE (dB)
FREQUENCY OFFSET (kHz)
08565-029
JITTER TRANSFER
MAGNITUDE (dB)
FREQUENCY OFFSET (kHz)
1
0
–1
–2
–3
10 20 30 40 50 60 70 80
JITTER PEAKING
Figure 11. Jitter Transfer, Loop Bandwidth = 75 kHz
242
243
244
245
246
247
248
249
TIME (ms)
FREQUENCY (MHz)
0 2 4 6 8 10 12 14 16 18 20
REF B TO A
TRANSITION
REF A TO B
TRANSITION
248.3MHz
242.8MHz
REF A TO XTAL
TRANSITION
XTAL TO REF A
TRANSITION
–19.6MHz/ms
+15.6MHz/ms
08565-313
Figure 12. Output Transient Due to Input Reference Switchover,
Pin Ax = 0110, Pin Yx = 000001, Loop Bandwidth = 170 Hz
654
656
658
660
662
664
666
0 5 10 15 20 25 30 35 40 45 50
TIME (µs)
FREQUENCY (MHz)
REF A TO B
TRANSITION
REF B TO A
TRANSITION
–13.6MHz/µs
–15.2MHz/µs
655.20 MHz
655.24 MHz
08565-314
Figure 13. Output Transient Due to Input Reference Switchover,
Pin Ax = 1101, Pin Yx = 101101, Loop Bandwidth = 75 kHz
08565-315
612
614
616
618
620
622
624
0 5 10 15 20
25 30 35 40 45 50
T
IME (µs)
FREQUENCY (MHz)
REF B TO A
TRANSITION
REF A TO B
TRANSITION
–15.2MHz/µs
614.09MHz
613.31MHz
–10.4MHz/µs
Figure 14. Output Transient Due to Input Reference Switchover,
Pin Ax = 1110, Pin Yx = 110011, Loop Bandwidth = 75 kHz