HFBR-1115TZ Просмотр технического описания (PDF) - Avago Technologies
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HFBR-1115TZ Datasheet PDF : 12 Pages
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These parameters are reflected in the guaranteed per-
formance of the transmitter and receiver specifications
in this data sheet. This same model has been used exten-
sively in the ANSI and IEEE committees, including the ANSI
X3T9.5 committee, to establish the optical performance
requirements for various fiber-optic interface standards.
The cable parameters used come from the ISO/IEC
JTC1/ SC 25/WG3 Generic Cabling for Customer Premises
per DIS 11801 document and the EIA/TIA-568-A Commer-
cial Building Telecommunications Cabling Standard per
SP-2840.
Transmitter and Receiver Signaling Rate Range and BER
Performance
For purposes of definition, the symbol rate (Baud), also
called signaling rate, is the reciprocal of the symbol time.
Data rate (bits/sec) is the symbol rate divided by the
encoding factor used to encode the data (symbols/bit).
When used in FDDI, ATM 100 Mbps, and Fast Ethernet
applications, the performance of Avago Technologies’
1300 nm HFBR-1115TZ/-2115TZ data link modules is guar-
anteed over the signaling rate of 10 MBd to 125 MBd to
the full conditions listed in the individual product speci-
fication tables.
The data link modules can be used for other applica-
tions at signaling rates outside of the 10 MBd to 125 MBd
range with some penalty in the link optical power budget
primarily caused by a reduction of receiver sensitivity.
Figure 5 gives an indication of the typical performance of
these 1300 nm products at different rates.
These data link modules can also be used for applications
which require different bit-error-ratio (BER) performance.
Figure 6 illustrates the typical trade-off between link BER
and the receiver input optical power level.
Data Link Jitter Performance
The Avago 1300 nm data link modules are designed to
operate per the system jitter allocations stated in Table E1
of Annex E of the FDDI PMD standard.
The 1300 nm transmitter will tolerate the worst-case input
electrical jitter allowed in the table without violating the
worst-case output jitter requirements of Section 8.1 Active
Output Interface of the FDDI PMD standard.
The 1300 nm receiver will tolerate the worst-case input
optical jitter allowed in Section 8.2 Active Input Interface
of the FDDI PMD standard without violating the worst-
case output electrical jitter allowed in the Table E1 of the
Annex E.
The jitter specifications stated in the following transmitter
and receiver specification table are derived from the
values in Table E1 of Annex E. They represent the worst-
case jitter contribution that the transmitter and receiver
are allowed to make to the overall system jitter without
violating the Annex E allocation example. In practice, the
typical jitter contribution of the Avago Technologies’ data
link modules is well below the maximum amounts.
Recommended Handling Precautions
It is advised that normal static precautions be taken in
the handling and assembly of these data link modules to
prevent damage which may be induced by electrostatic
discharge (ESD). The HFBR-1115TZ/-2115TZ series meets
MIL-STD-883C Method 3015.4 Class 2.
Care should be taken to avoid shorting the receiver Data
or Signal Detect Outputs directly to ground without
proper currentlimiting impedance.
3.0
2.5
2.0
1.5
1.0
0.5
0
0 25 50 75 100 125 150 175 200
SIGNAL RATE (MBd)
CONDITIONS:
1. PRBS 27-1
2. DATA SAMPLED AT CENTER OF DATA SYMBOL.
3. BER = 10-6
4. TA = 25° C
5. VCC = 5 Vdc
6. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
Figure 5. Transmitter/Receiver relative optical power budget at constant BER
vs. signaling rate.
4
1 x 10-2
1 x 10-3
1 x 10-4
CENTER OF
SYMBOL
1 x 10-5
1 x 10-6
1 x 10-7
1 x 10-8
2.5 x 10-10
1 x 10-11
1 x 10-12
-6 -4
-2
0
2
4
RELATIVE INPUT OPTICAL POWER – dB
CONDITIONS:
1. 125 MBd
2. PRBS 27-1
3. TA = 25° C
4. VCC = 5 Vdc
5. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
Figure 6. Bit-error-ratio vs. relative receiver input optical power.
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