ADM7001XACT1XP Lantiq, ADM7001XACT1XP Datasheet - Page 26

• Manufacturer Part Number: ADM7001XACT1XP
• Manufacturer: Lantiq

Specifications of ADM7001XACT1XP

• Lead Free Status / RoHS Status: Supplier Unconfirmed

The 100Base-X receiver consists of functional blocks required to recover and condition the 125 Mbps receive data
stream. The ADM7001 implements the 100Base-X receiving state machine diagram as given in ANSI/IEEE
Standard 802.3u, Clause 24. The 125 Mbps receive data stream may originate from the on-chip twisted-pair
transceiver in a 100Base-TX application. Alternatively, the receive data stream may be generated by an external
optical receiver as in a 100Base-FX application.
The receiver block consists of the following functional sub-blocks:
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A/D Converter
High performance A/D converter with 125M sampling rate converts signals received on RXP/RXN pins to 6-bits
data streams; besides it possess auto-gain-control capability that will further improve receive performance
especially under long cable or harsh detrimental signal integrity. Due to high pass characteristic on transformer,
built in base-line-wander correcting circuit will cancel it out and restore its DC level.
Figure 3
Adaptive Equalizer and Timing Recovery Module
All digital design is especially immune from noise environments, and achieves better correlations between
production and system testing. Baud rate Adaptive Equalizer/Timing Recovery compensates line loss induced
from twisted pair and tracks far end clock at 125M samples per second. Adaptive Equalizer implemented with Feed
Data Sheet
A/D Converter
Adaptive Equalizer and Timing Recovery Module
NRZI/NRZ and Serial/Parallel Decoder
De-scrambler
Symbol Alignment Block
Symbol Decoder
Collision Detect Block
Carrier Sense Block
Stream Decoder Block
100Base-X Block Diagram and Data Path
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Function Description
Rev. 1.07, 2005-09-12
Data sheet
ADM7001