QT2022/32 - Data Sheet: DS3051
Table 69: Serial Receiver Specifications (Continued)
Parameter
SCC11
Description
Min
6
Typ
Max Units
Conditions
Common-mode input return loss
Differential to common-mode conversion
Jitter amplitude tolerance
dB
0.1-15GHz
0.1-15GHz
SCD11
12
dB
JTOL_XFP
0.65
UIpp
XFP = 1, SJ@80MHz (see Note 2)
XFP = 0, SJ@80MHz (see Note 3)
XFP = 1
JTOL_
nonXFP
0.4
UIpp
Eye Mask in XFP mode
Figure 48
Tl
CDR Lock Time at Start-up
200
ms
from application of input data and de-
assertion of RXLOSB_I
Note 1: Return Loss given by equation SDD11(dB)= 10 - 16.6Log10(f/7.5), with f in GHz
Note 2: Total Jitter made up of DDJ+RJ+SJ; DDJ is generated using a length of FR4 to achieve 18ps pp DJ and then an
additional length corresponding to a worst-case XFI compliant channel; SJ is applied as per the template given in Figure 48.
Note 3: Jitter arrived at according to the same procedure as described in IEEE 802.3 Clause 52.9.10.2. Total Jitter (TJ)
made up of DDJ+DCD+RJ+SJ where the DDJ is generated using a 7.5GHz Bessel-Thomson filter, DCD (minimum
0.05UIpp) is generated using 1GHz sinusoidal amplitude interference and the SJ is applied as per the template given in
Figure 52-4 of IEEE802.3.
Note 4: Baud rate is specified relative to the reference clock frequency in Table 66 on page 191
Figure 48: 10Gb/s Receiver Input Compliance Mask in XFP mode
+525
(100mV allocated for multiple reflections)
Differential
Amplitude
mVpp
+55
0
-55
-525
X1=0.325
1-X1=0.675
Time in UI
196
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