Datasheet

Data Sheet AD9557
Rev. B | Page 19 of 92
TYPICAL PERFORMANCE CHARACTERISTICS
f
R
= input reference clock frequency; f
O
= output clock frequency; f
SYS
= SYSCLK input frequency; f
S
= internal system clock frequency;
LF = SYSCLK PLL internal loop filter used. AVDD, AVDD3, and DVDD at nominal supply voltage; f
S
= 786.432 MHz, unless otherwise noted.
–160
–150
–140
–130
–120
–110
–100
–90
–80
–70
–60
1k100 10k 100k 1M 10M 100M
PHASE NOISE (dBc/Hz)
FREQUENCY OFFSET (Hz)
INTEGRATED RMS JITTER (12kHz TO 20MHz): 296fs
09197-003
Figure 3. Absolute Phase Noise (Output Driver = HSTL),
f
R
= 19.44 MHz, f
O
= 622.08 MHz,
DPLL Loop BW = 50 Hz, f
SYS
= 49.152 MHz Crystal
–160
–150
–140
–130
–120
–110
–100
–90
–80
–70
–60
1k100 10k 100k 1M 10M 100M
PHASE NOISE (dBc/Hz)
FREQUENCY OFFSET (Hz)
INTEGRATED RMS JITTER (12kHz TO 20MHz): 320fs
09197-004
Figure 4. Absolute Phase Noise (Output Driver = HSTL),
f
R
= 19.44 MHz, f
O
= 644.53125 MHz,
DPLL Loop BW = 50 Hz, f
SYS
= 49.152 MHz Crystal
–160
–150
–140
–130
–120
–110
–100
–90
–80
–70
–60
1k
100
10k
100k
1M 10M 100M
PHASE NOISE (dBc/Hz)
FREQUENCY OFFSET (Hz)
INTEGRA
TED RMS JITTER (12kHz TO 20MHz): 285fs
09197-005
Figure 5. Absolute Phase Noise (Output Driver = HSTL),
f
R
= 19.44 MHz, f
O
= 693.482991 MHz,
DPLL Loop BW = 50 Hz, f
SYS
= 49.152 MHz Crystal
–160
–150
–140
–130
–120
–110
–100
–90
–80
–70
1k100
10k
100k 1M 10M 100M
PHASE NOISE (dBc/Hz)
FREQUENCY OFFSET (Hz)
INTEGRATED RMS JITTER (12kHz TO 20MHz): 301fs
09197-006
Figure 6. Absolute Phase Noise (Output Driver = HSTL),
f
R
= 19.44 MHz, f
O
= 174.703 MHz,
DPLL Loop BW = 1 kHz, f
SYS
= 49.152 MHz Crystal