Datasheet
Data Sheet AD9523
Rev. C | Page 17 of 60
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0 200 400 600 800 1000 1200
DIFFERENTIAL SWING (V p-p)
FREQUENCY (MHz)
LVDS = 3.5mA
LVDS = 7mA
08439-009
Figure 9. Differential Voltage Swing vs. Frequency;
LVDS Mode, 7 mA and 3.5 mA
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
100
200
300
400
500
600
AMPLITUDE (V)
FREQUENCY (MHz)
20pF
2pF
10pF
08439-010
Figure 10. Amplitude vs. Frequency and Capacitive Load;
CMOS Mode, 2 pF, 10 pF, and 20 pF
08439-013
CH1 200mV 2.5ns/DIV
40.0GS/s
A CH1 104mV
1
Figure 11. Output Waveform (Differential), LVPECL at 122.88 MHz
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
100 1k 10k 100k
1M
10M
08439-015
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
1: 100Hz, –85.0688dBc/Hz
2: 1kHz, –113.3955dBc/Hz
3: 8kHz, –125.8719dBc/Hz
4: 16kHz, –129.5942dBc/Hz
5: 100kHz, –134.5017dBc/Hz
6: 1MHz, –145.2872dBc/Hz
7: 10MHz, –156.2706dBc/Hz
8: 40MHz, –157.4153dBc/Hz
x: START 12kHz
STOP 80MHz
CENTER 40.006MHz
SPAN 79.988MHz
NOISE:
ANALYSIS RANGE X: BAND MARKER
ANALYSIS RANGE Y: BAND MARKER
INTG NOISE: –75.94595dBc/39.99MHz
RMS NOISE: 225.539µRAD
12.9224mdeg
RMS JITTER: 194.746fsec
RESIDUAL FM: 2.81623kHz
1
2
3
4
5
6
7
8
Figure 12. Phase Noise, Output = 184.32 MHz
(VCXO = 122.88 MHz, Crystek VCXO CVHD-950)
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
100 1k 10k 100k 1M 10M
08439-016
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
1: 100Hz, –89.0260dBc/Hz
2: 1kHz, –116.9949dBc/Hz
3: 8kHz, –129.5198dBc/Hz
4: 16kHz, –133.3916dBc/Hz
5: 100kHz, –137.7680dBc/Hz
6: 1MHz, –148.3519dBc/Hz
7: 10MHz, –158.3307dBc/Hz
8: 40MHz, 159.1629–dBc/Hz
x: START 12kHz
STOP 80MHz
CENTER 40.006MHz
SPAN 79.988MHz
NOISE:
ANALYSIS RANGE X: BAND MARKER
ANALYSIS RANGE Y: BAND MARKER
INTG NOISE: –78.8099dBc/39.99MHz
RMS NOISE: 162.189µRAD
9.29276mdeg
RMS JITTER: 210.069fsec
RESIDUAL FM: 2.27638kHz
1
2
3
4
5
6
7
8
Figure 13. Phase Noise, Output = 122.88 MHz
(VCXO = 122.88 MHz, Crystek VCXO CVHD-950; Doubler Is Off)
CH1 500mV Ω 2.5ns/DIV
40.0GS/s
A CH1 80mV
1
08439-049
Figure 14. Output Waveform (Differential), HSTL at 16 mA, 122.88 MHz