User guide

Figure 5-7: CTLE DC and AC Gain Conceptualization
DC Gain
Control
Gain
(dB)
Frequency
Gain
(dB)
Frequency
AC Gain
Control
Note: Final equalization curves will be available in the Arria 10 device datasheet.
High Data Rate Mode
High Data Rate Mode is a low power mode that supports data rate up to 28.3 Gbps. This mode provides
an alternative path for high gain mode. High Data Rate Mode can be used to compensate for the loss
similar to CEI 28G VSR. High data rate mode supports four bandwidth modes: Full, 3/4th, 1/2nd and
1/4th bandwidth modes. Full bandwidth mode can provide AC peaking at approximately 8 dB at a
peaking frequency of 14 GHz. High data rate mode can be operated in 3/4th, 1/2 and 1/4th bandwidth
with 9 GHz, 5 GHz and 2.5 GHz peaking frequencies. In high data rate mode, AC gain values and DC
gain values cannot be controlled individually as done in high gain mode. The recommended AC gain
values in high data rate mode includes the appropriate setting of DC gain to get the required peaking at
respective peaking frequencies.
UG-01143
2015.05.11
High Data Rate Mode
5-7
Arria 10 Transceiver PHY Architecture
Altera Corporation
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