MAX3624 Просмотр технического описания (PDF) - Maxim Integrated
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MAX3624 Datasheet PDF : 12 Pages
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Low-Jitter, Precision Clock Generator
with Four Outputs
Typical Operating Characteristics
(Typical values are at VCC = +3.3V, TA = +25°C, crystal frequency = 25MHz.)
SUPPLY CURRENT
vs. TEMPERATURE
250
225
200
175
ALL OUTPUTS ACTIVE AND TERMINATED
150
125
100 ALL OUTPUTS ACTIVE AND UNTERMINATED
75
50
25
0
0 10 20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE (°C)
-80
-90
-100
-110
-120
-130
-140
-150
-160
0.1
PHASE NOISE AT 312.5MHz
CLOCK FREQUENCY
1 10 100 1000 10,000 100,000
OFFSET FREQUENCY (kHz)
DIFFERENTIAL OUTPUT WAVEFORM
AT 156.25MHz (LVPECL OUTPUT)
MAX3624 toc02
1ns/div
-80
-90
-100
-110
-120
-130
-140
-150
-160
0.1
PHASE NOISE AT 125MHz
CLOCK FREQUENCY
1 10 100 1000 10,000 100,000
OFFSET FREQUENCY (kHz)
OUTPUT WAVEFORM AT 125MHz
(LVCMOS OUTPUT)
MAX3624 toc03
MEASURED USING 50Ω OSCILLOSCOPE INPUT
THROUGH NETWORK SHOWN IN FIGURE 1
-80
-90
-100
-110
-120
-130
-140
-150
-160
0.1
1ns/div
PHASE NOISE AT 212.5MHz
CLOCK FREQUENCY
(26.5625MHz CRYSTAL)
1 10 100 1000 10,000 100,000
OFFSET FREQUENCY (kHz)
JITTER HISTOGRAM (312.5MHz OUTPUT,
40mVP-P SUPPLY NOISE AT 100kHz)
MAX3624 toc07
DJ = 5.6psP-P
DJ + RJ = 14psP-P
5ps/div
SPURS INDUCED BY POWER-SUPPLY NOISE
vs. NOISE FREQUENCY
0
fC = 312.5MHz
-10 NOISE AMPLITUDE = 40mVP-P
-20
-30
-40
-50
-60
-70
-80
-90
10
100
1000
NOISE FREQUENCY (kHz)
10,000
_______________________________________________________________________________________ 5
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