Electrical characteristics (continued) – Rainbow Electronics MAX3622 User Manual
Page 3
MAX3622
Low-Jitter, Precision Clock Generator
with Two Outputs
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise
noted.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLOCK OUTPUT AC SPECIFICATIONS
VCO Frequency Range
620
625
648
MHz
12kHz to 20MHz
0.36
1.0
Random Jitter
RJ
RMS
1.875MHz to 20MHz
0.14
ps
RMS
LVPECL output
4
Deterministic Jitter Induced by
Power-Supply Noise
(Notes 5, 6)
LVCMOS output
19
ps
P-P
LVPECL output
-57
Spurs Induced by Power-Supply
Noise (Note 6)
LVCMOS output
-47
dBc
Nonharmonic and Subharmonic
Spurs
-70 dBc
f = 1kHz
-124
f = 10kHz
-126
f = 100kHz
-130
f = 1MHz
-145
Clock Output SSB Phase Noise
at 125MHz
f > 10MHz
-153
dBc/Hz
Note 1:
A series resistor of up to 10.5
Ω is allowed between V
CC
and V
CCA
for filtering supply noise when system power-supply
tolerance is V
CC
= 3.3V ±5%. See Figure 2.
Note 2:
LVPECL terminated with 50
Ω load connected to V
TT
= V
CC
- 2V.
Note 3:
Both outputs enabled and unloaded.
Note 4:
Measured using setup shown in Figure 1 with V
CC
= 3.3V ±5%.
Note 5:
Measured with Agilent DSO81304A 40GS/s real-time oscilloscope.
Note 6:
Measured with 40mV
P-P
, 100kHz sinusoidal signal on the supply with V
CCA
connected as shown in Figure 2.
MAX3622
QA_C
36
Ω
499
Ω
Z
0
= 50
Ω
OSCILLOSCOPE
4.7pF
0.1
μF
50
Ω
Figure 1. LVCMOS Output Measurement Setup