SM802109 Datasheet, PDF (6/11 Pages) Micrel Semiconductor – ClockWorks™ PCI-e Quad 100MHz Ultra-Low Jitter, HCSL Frequency Synthesizer

Micrel, Inc.
SM802109
AC Electrical Characteristics^{(4, 5)}
V_DD = V_DDO1/2 = 3.3V ±5% or 2.5V ±5%
V_DD = 3.3V ±5%, V_DDO1/2 = 3.3V ±5% or 2.5V ±5%
T_A = −40°C to +85°C. R_L = 50Ω to V_SS
Symbol
Parameter
F_OUT
F_REF
T_R/T_F
ODC
Output Frequency
Reference Input Frequency
LVPECL Output Rise/Fall Time
Output Duty Cycle
20% – 80%
T_SKEW
T_LOCK
Output-to-Output Skew
PLL Lock Time
Note 6
Condition
Min.
150
48
Typ.
100
25
300
50
Max.
450
52
45
20
Units
MHz
MHz
ps
%
ps
ms
100MHz
T_jit(∅)
RMS Phase Jitter⁽⁷⁾
Integration Range (1.875MHz – 20MHz)
105
fs
Integration Range (12kHz – 20MHz)
250
Spurious Noise Components
25MHz
−95
dBc
Notes:
5. All phase noise measurements were taken with an Agilent 5052B phase noise system.
6. Defined as skew between outputs at the same supply voltage and with equal load conditions; measured at the output differential crossing points.
7. Measured using 25MHz crystal as the input reference source. If using an external reference input, use a low phase noise source. With an external
reference, the phase noise will follow the input source phase noise up to about 1MHz.
September 2011
6
M9999-092911-B
[e-mail] or [phone]