Table 1. crystal selection parameters – Rainbow Electronics MAX3629 User Manual
Page 11
MAX3629
+3.3V, Low-Jitter, Precision Clock Generator
with Multiple Outputs
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11
Table 1. Crystal Selection Parameters
C46 = 33pF, the measured output frequency accuracy
is -1ppm at +25°C ambient temperature.
Crystal Selection
The crystal oscillator is designed to drive a fundamental
mode, AT-cut crystal resonator. See Table 1 for recom-
mended crystal specifications. See Figure 6 for external
capacitance connection.
Figure 5. Crystal Layout
X_IN
X_OUT
27pF
33pF
CRYSTAL
(C
L
= 18pF)
Figure 6. Crystal, Capacitors Connection
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Crystal Oscillation Frequency
f
OSC
25 MHz
Shunt Capacitance
C
O
7.0
pF
Load Capacitance
C
L
18 pF
Equivalent Series Resistance (ESR)
R
S
50
Maximum Crystal Drive Level
300
μW