Rainbow Electronics MAX3622 - Manual (Page 3)

MAX3622
Low-Jitter, Precision Clock Generator
with Two Outputs
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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