Differential Receiver; Jitter - Xilinx RocketIO User Manual

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Differential Receiver

Differential Receiver
The differential receiver accepts the V
calculation V
All input data must be differential and nominally biased to a common mode voltage of
0.5 V – 2.5 V, or AC coupled. Internal terminations provide for simple 50Ω or 75Ω
transmission line connection. See
The differential receiver parameters are shown in
Table 3-3: Differential Receiver Parameters
Notes:
1. UI = Unit Interval

Jitter

Jitter is defined as the short-term variations of significant instants of a signal from their
ideal positions in time (ITU). Jitter is typically expressed in a decimal fraction of Unit
Interval (UI), e.g. 0.3 UI.
Total Jitter = Deterministic Jitter (DJ) + Random Jitter (RJ).
RocketIO™ Transceiver User Guide
UG024 (v3.0) February 22, 2007
– V electronically.
P N
Parameter
Serial input differential peak
V
IN
to peak (RXP/RXN)
Common mode input voltage
V
ICM
range
T Differential input skew
ISKEW
Receive data total jitter
T
JTOL
tolerance (peak to peak)
Receive data deterministic
T
DJTOL
jitter tolerance (peak to peak)
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and V signals, carrying out the difference
P N
Figure 3-6.
AVCCAUXRX
RXP Pullup
Pin Network
50 or 75
VTRX
50 or 75
RXN
Pin
GNDA
Figure 3-6: MGT Receiver
Table
Min Typ
175
500
PMA
RXP
PMA
RXN
UG024_47_012904
3-3.
Max Units Conditions
2000 mV
2500 mV
75 ps
(1)
0.65 UI
0.41 UI
R
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