MAX3674 Ver la hoja de datos (PDF) - Microsemi Corporation
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MAX3674 Datasheet PDF : 20 Pages
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High-Performance, Dual-Output,
Network Clock Synthesizer
Typical Operating Characteristics (continued)
(VCC = VCC_PLL = +3.3V, TA = +25°C, fQA = fQB = 500MHz (P = 4, NA = 4, NB = 1, M = 500), REF_SEL= high (crystal oscillator),
fXTAL = 16MHz, unless otherwise noted.)
RELATIVE SIDEBAND SPUR POWER
DUE TO POWER-SUPPLY NOISE
-20
-25
SINUSOIDAL SUPPLY NOISE = 50mVP-P
-30
-35
-40
-45
-50
-55
-60
-65
-70
10k
100k
1M
10M
SUPPLY NOISE FREQUENCY (Hz)
JITTER vs. SUPPLY NOISE FREQUENCY
5
SINUSOIDAL SUPPLY NOISE = 50mVP-P
4
CYCLE-TO-CYCLE JITTER
3
PERIOD JITTER
2
1
0
10k
100k
1M
10M
SUPPLY NOISE FREQUENCY (Hz)
PLL LOCK TIME vs. VCO FREQUENCY
(MR DEASSERT TO LOCK ASSERT)
6
5
P=4
4
3
P=2
2
1
1360 1632 1904 2176 2448 2720
VCO FREQUENCY (MHz)
CYCLE-TO-CYCLE JITTER (PEAK-TO-PEAK)
vs. VCO FREQUENCY
100
90
SAMPLE = 20,000 CYCLES
QA OUTPUT, NA = 4
80
70
60
NB = 2
50
40
30
NB = 1
20
10
0
1360 1632 1904 2176 2448 2720
VCO FREQUENCY (MHz)
PLL ACQUISITION TIME WHEN
INCREMENTING/DECREMENTING M
500
450
400
350
300
P=2
250
200
150
P=4
100
50
0
0 5 10 15 20 25 30 35 40 45 50
ΔM (DECIMAL VALUE)
PERIOD JITTER (PEAK-TO-PEAK)
vs. VCO FREQUENCY
100
90
SAMPLE = 20,000 CYCLES
QA OUTPUT, NA = 4
80
70
60
50
NB = 2
40
NB = 1
30
20
10
0
1360 1632 1904 2176 2448 2720
VCO FREQUENCY (MHz)
6 _______________________________________________________________________________________
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