Rainbow Electronics MAX3627 - Manual (Page 6)

MAX3627
+3.3V, Low-Jitter, Precision Clock
Generator with Multiple Outputs
6 _______________________________________________________________________________________
PHASE NOISE AT 156.25MHz
CLOCK FREQUENCY (Q0)
MAX3627 toc04
OFFSET FREQUENCY (kHz)
NOISE POWER DENSITY (dBc/Hz)
10,000 1000 1 10 100
-150
-140
-130
-120
-110
-100
-90
-80
-160
0.1 100,000
PHASE NOISE AT 156.25MHz
CLOCK FREQUENCY (Q7)
MAX3627 toc05
OFFSET FREQUENCY (kHz)
NOISE POWER DENSITY (dBc/Hz)
10,000 1000 1 10 100
-150
-140
-130
-120
-110
-100
-90
-80
-160
0.1 100,000
PHASE NOISE AT 312.5MHz
CLOCK FREQUENCY (Q0)
MAX3627 toc06
OFFSET FREQUENCY (kHz)
NOISE POWER DENSITY (dBc/Hz)
10,000 1000 1 10 100
-150
-140
-130
-120
-110
-100
-90
-80
-160
0.1 100,000
DIFFERENTIAL OUTPUT WAVEFORM
AT 125MHz (LVDS OUTPUT)
MAX3627 toc07
1ns/div
100mV/div
DIFFERENTIAL OUTPUT WAVEFORM
AT 156.25MHz (LVDS OUTPUT)
MAX3627 toc08
1ns/div
100mV/div
DIFFERENTIAL OUTPUT WAVEFORM
AT 312.5MHz (LVDS OUTPUT)
MAX3627 toc09
500ps/div
100mV/div
OUTPUT WAVEFORM
AT 125MHz (CMOS OUTPUT)
MAX3627 toc10
1ns/div
15mV/div
MEASURED USING
SETUP IN FIGURE 2
SPURS INDUCED BY POWER-SUPPLY
NOISE vs. NOISE FREQUENCY
MAX3627 toc11
NOISE FREQUENCY (kHz)
SPUR AMPLITUDE (dBc)
100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10 1000
f C = 156.25MHz
V NOISE = 200mV P-P
V NOISE = 100mV P-P
V NOISE = 40mV P-P
SPURS INDUCED BY POWER-SUPPLY
NOISE vs. NOISE FREQUENCY
MAX3627 toc12
NOISE FREQUENCY (kHz)
SPUR AMPLITUDE (dBc)
100
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
10 1000
f C = 125MHz
OUTPUT = Q7
V NOISE = 200mV P-P
V NOISE = 100mV P-P
V
NOISE
= 40mV
P-P
Typical Operating Characteristics (continued)
(Typical values are at V DD = +3.3V, T A = +25 °C, crystal frequency = 25MHz.)