AD9553 查看數據表（PDF） - Analog Devices

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AD9553

Flexible Clock Translator for GPON, Base Station, SONET/SDH, T1/E1, and Ethernet

Analog Devices 

AD9553

5

0

JITTER TRANSFER

–5

2

–10

1

JITTER PEAKING

–15

0

–1

–20

–2

–25

–3

0 25 50 75 100 125 150 175

FREQUENCY OFFSET (Hz)

–30

10

100

1k

FREQUENCY OFFSET (Hz)

Figure 9. Jitter Transfer, Loop Bandwidth = 170 Hz

10

JITTER TRANSFER

0

–10

–20

–30

–40

–50

–60

1k

10k

100k

1M

FREQUENCY OFFSET (Hz)

Figure 10. Jitter Transfer, Loop Bandwidth = 20 kHz

5

0

–5

JITTER TRANSFER

–10

–15 1

–20

0

–25

–1

–30

–35 –2

JITTER PEAKING

–40 –3

10 20 30 40 50 60 70 80

FREQUENCY OFFSET (kHz)

–45

10

100

1k

FREQUENCY OFFSET (kHz)

Figure 11. Jitter Transfer, Loop Bandwidth = 75 kHz

249

248.3MHz

248

XTAL TO REF A

TRANSITION

+15.6MHz/ms

247

246

–19.6MHz/ms

245

REF A TO XTAL

TRANSITION

244

REF B TO A

TRANSITION

243

REF A TO B

TRANSITION

242.8MHz

242

0 2 4 6 8 10 12 14 16 18 20

TIME (ms)

Figure 12. Output Transient Due to Input Reference Switchover,

Pin Ax = 0110, Pin Yx = 000001, Loop Bandwidth = 170 Hz

666

–15.2MHz/µs

–13.6MHz/µs

664

662

660

REF A TO B

TRANSITION

658

656

655.20 MHz

655.24 MHz

REF B TO A

TRANSITION

654

0

5 10 15 20 25 30 35 40 45 50

TIME (µs)

Figure 13. Output Transient Due to Input Reference Switchover,

Pin Ax = 1101, Pin Yx = 101101, Loop Bandwidth = 75 kHz

624

–15.2MHz/µs

–10.4MHz/µs

622

620

618

REF A TO B

TRANSITION

616

614

614.09MHz

613.31MHz

REF B TO A

TRANSITION

612

0

5 10 15 20 25 30 35 40 45 50

TIME (µs)

Figure 14. Output Transient Due to Input Reference Switchover,

Pin Ax = 1110, Pin Yx = 110011, Loop Bandwidth = 75 kHz

Rev. A | Page 12 of 44

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