DS280DF810ABVT datasheet(24/51 Pages) TI1

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DS280DF810

SNLS538A – SEPTEMBER 2016 – REVISED OCTOBER 2019

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Table 2. Typical VOD and FIR Values (continued)

FIR SETTINGS

PEAK-TO PEAK

VOD(V)

RPRE(dB)

RPST(dB)

PRE-CURSOR:

REG_0x3E[6:0]

MAIN-CURSOR:

REG_0x3D[6:0]

POST-CURSOR:

REG_0x3F[6:0]

-6

1.165

3.3

-7

1.165

3.9

-8

1.165

4.7

-9

1.165

5.7

-10

1.165

6.9

-11

1.165

8.4

-12

1.165

10.1

-1

1.165

0.7

-2

1.165

1.2

-3

1.165

1.5

-4

1.165

2.0

-5

1.165

2.6

-6

1.165

3.2

-7

1.165

4.0

The recommended pre-cursor and post-cursor settings for a given channel will depend on the channel

characteristics (mainly insertion loss) as well as the equalization capabilities of the downstream receiver. The

DS280DF810 receiver, with its highly-capable CTLE and DFE, does not require a significant amount of pre-

cursor or post-cursor. The figures below give general recommendations for pre- and post-cursor for different

channel loss conditions. The insertion loss (IL) in these plots refers to the total loss between the link partner

transmitter and the DS280DF810 receiver.

Figure 11. Guideline for Link partner FIR Settings When IL

≤ 15 dB

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