DS16EV5110A Datasheet, PDF (15/22 Pages) Texas Instruments – DS16EV5110A Video Equalizer (3D+C) for DVI, HDMI Source/Repeater/Sink Applications

CABLE SELECTION
At higher frequencies, longer cable lengths produce greater
losses due to the skin effect. The quality of the cable with
respect to conductor wire gauge and shielding heavily influ-
ences performance. Thicker conductors have lower signal
degradation per unit length. In nearly all applications, the
DS16EV5110A equalization can be set to 0x04, and equalize
up to 22 dB skin effect loss for all input cable configurations
at all data rates, without degrading signal integrity.
28 AWG STP DVI / HDMI CABLES RECOMMENDED
BOOST SETTINGS
The following table presents the recommended boost control
settings for various data rates and cable lengths for 28 AWG
DVI/HDMI compliant configurations. Boost setting maybe
done via the three BST[2:0] pins or via the respective register
values.
TABLE 6. Boost Control Setting for STP Cables
Setting Data Rate
28 AWG DVI / HDMI
0x04
750 Mbps
0–25m
0x04 1.65 Gbps
0–20m
0x06
750 Mbps
25m to greater than 30m
0x06 1.65 Gbps
20m to greater than 25m
0x03 2.25 Gbps
0–15m
0x06 2.25 Gbps
15m to greater than 20m
Figure 9 shows the cable extension and jitter reduction ob-
tained with the use of the equalizer. Table 6 lists the various
gain settings used versus cable length recommendations.
UTP (UNSHIELDED TWIST PAIRS) CABLES
The DS16EV5110A can be used to extend the length of UTP
cables, such as Cat5, Cat5e and Cat6 to distances greater
than 20 meters at 1.65 Gbps with < 0.13 UI of jitter. Please
note that for non-standard DVI/HDMI cables, the user must
ensure the clock-to-data channel skew requirements are met.
Table 7 presents the recommended boost control settings for
various data rates and cable lengths for UTP configurations:
TABLE 7. Boost Control Setting for UTP Cables
Setting
Data Rate
Cat5 Cable
0x03
750 Mbps
0–25m
0x06
750 Mbps
25–45m
0x03
1.65 Gbps
Greater than 20m
Figure 10 shows the cable extension and jitter reduction ob-
tained with the use of the equalizer. Table 7 lists the various
gain settings used versus cable length recommendations.
30064643
FIGURE 10. Equalized vs. Unequalized Jitter
Performance Over Cat5 Cable
30064642
FIGURE 9. Equalized vs. Unequalized Jitter Performance
Over 28 AWG DVI/HDMI Cable
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