AD9548SLASHPCBZ datasheet(20/112 Pages) AD

20 / 112 page

AD9548

Rev. 0 | Page 20 of 112

ROHDE & SCHWARZ

SMA100 (1GHz)

ROHDE & SCHWARZ

SMA100 (50MHz)

20MHz OCXO

–170

–160

–150

–140

–130

–120

–110

–100

–90

100

10k

100k

10M

FREQUENCY OFFSET (Hz)

Figure 13. Phase Noise of SYSCLK Input Sources

LVDS

0.2

0.4

0.6

0.8

1.0

100

200

300

400

500

600

700

FREQUENCY (MHz)

LVPECL

Figure 14. Amplitude vs. Toggle Rate,

LVPECL and LVDS

10pF LOAD

20pF LOAD

1.0

1.5

2.0

2.5

3.0

3.5

4.0

100

200

300

400

500

FREQUENCY (MHz)

Figure 15. Amplitude vs. Toggle Rate,

3.3 V CMOS (Strong Mode)

–70

–60

–50

–40

–30

–20

–10

100

10k

100k

FREQUENCY OFFSET (Hz)

CLOSED-LOOP PEAKING: 0.04dB

Figure 16. Jitter Transfer Bandwidth, Output Driver = LVPECL,

fR = 19.44 MHz, fO = 155.52 MHz,

LBW = 100 Hz (Phase Margin = 88°), fSYS = 1 GHz, PLL Off

FREQUENCY (MHz)

0.5

1.0

1.5

2.0

100

150

250

200

5pF LOAD

10pF LOAD

20pF LOAD

Figure 17. Amplitude vs. Toggle Rate,

1.8 V CMOS

10pF LOAD

5pF LOAD

1.0

1.5

2.0

2.5

3.0

3.5

4.0

1020304050

FREQUENCY (MHz)

Figure 18. Amplitude vs. Toggle Rate,

3.3 V CMOS (Weak Mode)

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