MAX3637 Datasheet, PDF (5/23 Pages) Maxim Integrated Products – Low-Jitter, Wide Frequency Range, Programmable Clock Generator with 10 Outputs

Low-Jitter, Wide Frequency Range,
Programmable Clock Generator with 10 Outputs
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +3.6V, TA = -40°C to +85°C. Typical values are at VCC = +3.3V, TA = +25°C, unless otherwise noted. Signal applied
to CIN or DIN/DIN only when selected as the reference clock.) (Note 1)
PARAMETER
SSB Phase Noise at 62.5MHz
SYMBOL
CONDITIONS
fOFFSET = 1kHz
fOFFSET = 10kHz
fOFFSET = 100kHz
fOFFSET = 1MHz
fOFFSET R 10MHz
MIN TYP MAX UNITS
-129
-130
-137
-152
dBc/
Hz
-156
Note 1: A series resistor of up to 10.5I is allowed between VCC and VCCA for filtering supply noise when system power-supply
tolerance is VCC = 3.3V Q5%. See Figure 3.
Note 2: Measured with all outputs enabled and unloaded.
Note 3: CIN can be AC- or DC-coupled. See Figure 8. Input high voltage must be ≤ VCC + 0.3V.
Note 4: DIN can be AC- or DC-coupled. See Figure 10.
Note 5: Measured with 100I differential load.
Note 6: Measured with crystal input, or with 50% duty cycle LVCMOS or differential input.
Note 7: Measured with output termination of 50I to VCC - 2V or Thevenin equivalent.
Note 8: Measured with a series resistor of 33I to a load capacitance of 3.0pF. See Figure 1.
Note 9: Measured at 156.25MHz output.
Note 10: Measured using LVCMOS/LVTTL input with slew rate R 1.0V/ns, or differential input with slew rate R 0.5V/ns.
Note 11: Measured at 156.25MHz output with 200kHz, 50mVP-P sinusoidal signal on the supply using the crystal input and
the power-supply filter shown in Figure 3. See the Typical Operating Characteristics for other supply noise frequen-
cies. Deterministic jitter is calculated from the measured power-supply-induced spurs. For more information, refer to
Application Note 4461: HFAN-04.5.5: Characterizing Power-Supply Noise Rejection in PLL Clock Synthesizers.
Note 12: Measured with all outputs enabled and all three banks at different frequencies.
QCC
33Ω
LVCMOS
Z = 50Ω
MAX3637
499Ω ^0.1µF
3pF
Z = 50Ω
OSCILLOSCOPE
50Ω
Figure 1. LVCMOS Output Measurement Setup
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