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SM802112UMGTR Scheda tecnica(PDF) 6 Page - Micrel Semiconductor

Il numero della parte SM802112UMGTR
Spiegazioni elettronici  ClockWorks??3-Output, 480MHz/80MHz, Ultra-Low Jitter LVDS/CMOS Frequency Synthesizer
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Produttore elettronici  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

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Micrel, Inc.
SM802112
September 2011
6
M9999-091411-A
hbwhelp@micrel.com or (408) 955-1690
AC Electrical Characteristics
(4, 5)
VDD = VDDO1/2 = 3.3V ±5% or 2.5V ±5%
VDD = 3.3V ±5%, VDDO1/2 = 3.3V ±5% or 2.5V ±5%
TA = −40°C to +85°C.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
Q0 Output
480
FOUT
Output Frequency
Q1, Q2 Outputs
80
MHz
FREF
Reference Input Frequency
80
MHz
LVDS Output Rise/Fall Time
20% – 80%
100
250
400
TR/TF
LCMOS Output Rise/Fall Time
20% – 80%
100
250
500
ps
LVDS Outputs
48
50
52
ODC
Output Duty Cycle
LVCMOS Output
45
50
55
%
TSKEW
Output-to-Output Skew
Q1 to Q2, Note 6
60
150
ps
TLOCK
PLL Lock Time
20
ms
Tjit(∅)
RMS Phase Jitter
(7)
480MHz LVDS
Integration Range (1kHz – 100MHz)
80MHz LVDS, LVCMOS
Integration Range (1kHz – 20MHz)
300
290
600
600
fs
Phase
Noise
Input Phase Noise
80MHz Input Frequency
Offset Frequency:
1kHz
10kHz
100kHz
1MHz
−124
−135
−143
−145
dBc
Output Phase Noise
480MHz Output Frequency
Offset Frequency:
1kHz
10kHz
100kHz
1MHz
10MHz
20MHz
100MHz
−105
−115
−120
−120
−150
−154
−160
dBc
Phase
Noise
Spurious Noise Components
80MHz for Q0 480MHz
−58
-48
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 temperature. Measured as the difference of the output differential crossing point
of Q1 and /Q1 80MHz LVDS, and the 50% point of LVCMOS Q2. LVCMOS Q2 and /Q2 are both ac coupled into 50 ohms.
7.
REF_IN driven with a low-noise source, ClockWorks SM802001 programmed for an 80MHz CMOS output. 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. Measured with
input noise of 1kHz -126dBc, 10kHz -136dBc, 100kHz -143dBc, 1MHz -146dBc.


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