SM802149 데이터 시트보기 (PDF) - Micrel
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SM802149 Datasheet PDF : 11 Pages
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Micrel, Inc.
Crystal Characteristics
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitor, C0
Correlation Drive Level
Condition
10pF load
SM802149
Min.
Typ.
Max.
Fundamental, Parallel Resonant
26.04166
50
1
5
10
100
Units
MHz
Ω
pF
µW
LVDS OUTPUT DC Electrical Characteristics(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.
RL = 100Ω across Q and /Q.
Symbol Parameter
Condition
Min.
Typ.
VOD
ΔVOD
VOS
ΔVOS
Differential Output Voltage
VOD Magnitude Change
Offset Voltage
VOS Magnitude Change
Figure 1, Figure 4
275
350
1.15
1.25
Max.
475
40
1.50
50
Units
mV
mV
V
mV
AC Electrical Characteristics(5, 6)
VDD = VDDO1/2 = 3.3V ±5% or 2.5V ±5%, VDD = 3.3V ±5%, VDDOX1/2= 3.3V ±5% or 2.5V ±5%, TA = −40°C to +85°C.
Symbol Parameter
Condition
Min. Typ.
Max. Units
FOUT
Output Frequency 1
Output Frequency 2
FSEL = 1, Q1−Q4
FSEL = 1, Q5–Q8
312.5
156.25
MHz
MHz
FOUT
Output Frequency 1
Output Frequency 2
FSEL = 0, Q1–Q4
FSEL = 0, Q5–Q8
156.25
78.125
MHz
MHz
TR/TF
TSKEW
ODC
Output Rise/Fall Time
Output-to-Output Skew
Output Duty Cycle
20%–80%, Figure 2, Figure 4
Within bank. Note 7
LVDS outputs
100 220 400 ps
45
ps
48
50
52
%
TLOCK
PLL Lock Time
RMS Phase Jitter(8)
(Output = 156.25MHz)
RMS Phase Jitter(8)
(Output = 312.5MHz)
Integration range: 12kHz–20MHz
Integration range: 1.875MHZ–20MHz
Integration range: 12kHz–20MHz
Integration range: 1.875MHz–20MHz
20
ms
260
fs
105
fs
250
fs
99
fs
Notes:
6. All phase noise measurements were taken with an Agilent 5052B phase noise system.
7. Defined as skew between outputs at the same supply voltage and with equal load conditions; Measured at the output differential crossing points.
8. Measured using a 26.04166 MHz 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.
March 1, 2013
6
Revision 1.1
hbwhelp@micrel.com or (408) 955-1690
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