Electrical characteristics (continued) – Rainbow Electronics MAX3627 User Manual
Page 4
MAX3627
+3.3V, Low-Jitter, Precision Clock
Generator with Multiple Outputs
4
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ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +3.0V to +3.6V, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at V
DD
= +3.3V, T
A
= +25°C, unless otherwise
noted. When using X_IN, X_OUT input, no signal is applied at OSC_IN. When PLL is enabled, PLL_BP = high-Z or high. When PLL is
bypassed, PLL_BP = low.) (Note 1)
Note 1:
A series resistor of up to 10.5
Ω is allowed between V
DD
and V
DDA
for filtering supply noise when system power-supply tol-
erance is V
DD
= 3.3V ±5%. See Figure 4.
Note 2:
All outputs unloaded.
Note 3:
The current when an LVDS output is shorted to ground is the steady-state current after the detection circuitry has settled. It
is expected that the LVDS output short to ground condition is short-term only.
Note 4:
Measured with OSC_IN input with 50% duty cycle.
Note 5:
Measured with a series resistor of 33
Ω to a load capacitance of 3.0pF. See Figure 2.
Note 6:
The OSC_IN input can be DC- or AC-coupled.
Note 7:
Must be within the absolute maximum rating of V
DD
+ 0.3V.
Note 8:
AC characteristics of LVCMOS output (Q7) are only guaranteed up to 160MHz.
Note 9:
Measured with 25MHz crystal (with OSC_IN left open).
Note 10: Measured with 25MHz reference clock applied to OSC_IN.
Note 11: Measured with 40mV
P-P
sinusoidal signal on the supply at 100kHz. For LVDS the output frequency is 156.25MHz; for
LVCMOS the output frequency is 125MHz. Measured with a 10.5
Ω resistor between V
DD
and V
DDA
.
Note 12: Parameter calculated based on PSNR.
Note 13: Measurement includes XTAL oscillator feedthrough, crosstalk, intermodulation spurs, etc.
Note 14: Measured with 25MHz XTAL oscillator.
Qx
R
L
= 100
Ω
Qx
SINGLE-ENDED OUTPUT
DIFFERENTIAL OUTPUT
V
V
OD
V
ODP-P
= 2IV
OD
I
IV
OD
I
Qx
Qx
Qx - Qx
V
OS
V
OL
0
V
OH
Figure 1. Driver Output Levels
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
f
=
100Hz
-113
f
=
1kHz
-123
f
=
10kHz
-126
f = 100kHz
-130
f
=
1MHz
-144
LVCMOS Clock Output SSB
Phase Noise at 125MHz
(Note 14)
f
>
10MHz
-151
dBc/Hz