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V62/12615-01XE-R データシート(PDF) 48 Page - Texas Instruments

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部品番号 V62/12615-01XE-R
部品情報  DP83848-EP PHYTER??Military Temperature Single Port 10/100 Mbps Ethernet Physical Layer Transceiver
PDF  98 Pages
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

V62/12615-01XE-R データシート(HTML) 48 Page - Texas Instruments

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Attenuation versus Frequency
Frequency (MHz)
30
25
20
15
10
5
0
0
20
40
60
80
100
120
35
150m
130m
100m
50m
0m
48
DP83848-EP
SLLSEC6E – SEPTEMBER 2012 – REVISED JUNE 2019
www.ti.com
Submit Documentation Feedback
Product Folder Links: DP83848-EP
Detailed Description
Copyright © 2012–2019, Texas Instruments Incorporated
The DP83848-EP uses an extremely robust equalization scheme referred as ‘Digital Adaptive
Equalization.’
The Digital Equalizer removes ISI (inter symbol interference) from the receive data stream by continuously
adapting to provide a filter with the inverse frequency response of the channel. Equalization is combined
with an adaptive gain control stage. This enables the receive 'eye pattern' to be opened sufficiently to
allow very reliable data recovery.
The curves given in Figure 5-8 illustrate attenuation at certain frequencies for given cable lengths. This is
derived from the worst case frequency vs attenuation figures as specified in the EIA/TIA Bulletin TSB-36.
These curves indicate the significant variations in signal attenuation that must be compensated for by the
receive adaptive equalization circuit.
Figure 5-7. EIA/TIA Attenuation vs Frequency for 0, 50, 100, 130, and 150 M of CAT 5 Cable
5.5.1.2.2.2 Base Line Wander Compensation
Figure 5-8. 100BASE-TX BLW Event



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