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HFBR-782BHZ Datasheet(PDF) 8 Page - AVAGO TECHNOLOGIES LIMITED |
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HFBR-782BHZ Datasheet(HTML) 8 Page - AVAGO TECHNOLOGIES LIMITED |
8 / 24 page 8 Optical Characteristics Transmitter Optical Characteristics (TC = 0 °C to +80 °C, VCC = 3.3 V ± 5%, Typical TC = +40 °C, VCC = 3.3 V) Parameter Symbol Min. Typ. Max. Unit Reference Output Optical Power POUT –8 –4 –2 dBm avg. 1 Output Optical Power – Off State POUT DIS –30 dBm avg. Extinction Ratio Output Power -2 to -8 dBm ER 6 7 dB 2 Center Wavelength lC 830 850 860 nm Spectral Width – rms s 0.4 0.85 nm rms Rise/Fall Time tr/tf 50 100 ps 3 Inter-channel Skew 110 200 ps 4 Relative Intensity Noise RIN –124 dB/Hz Jitter Contribution Deterministic Total DJ TJ 20 60 60 120 psp-p psp-p 5 6 Notes: 1. The specified optical output power, measured at the output of a short test cable, will be compliant with IEC 60825-1 Amendment 2, Class 1 Accessible Emission Limits, AEL, and the output power of the module without an attached cable will be compliant with the IEC 60825-1 Amendment 2, Class 1M AEL. See discussion in the Regulatory Compliance section. 2. Extinction Ratio is defined as the ratio of the average output optical power of the transmitter in the high (“1”) state to the low (“0”) state and is expressed in decibels (dB) by the relationship 10log(Phigh avg/Plow avg). The transmitter is driven with a 550 MBaud, 27-1 PRBS serial encoded pattern. 3. These are filtered rise/fall time measurements as defined in IEEE Gb Ethernet specification using a 2.488GBd (1.875 GHz bandwidth) 4th Bessel Thompson filter. A max spec of 100ps for unfiltered waveform is equivalent to a max spec 215ps for filtered waveform. 4. Inter-channel Skew is defined for the condition of equal amplitude, zero ps skew input signals. 5. Deterministic Jitter (DJ) is defined as the combination of Duty Cycle Distortion (Pulse-Width Distortion) and Data Dependent Jitter. Deterministic Jitter is measured at the 50% signal threshold level using a 2.5 GBd Pseudo Random Bit Sequence of length 223 – 1 (PRBS), or equivalent, test pattern with zero skew between the differential data input signals. 6. Total Jitter (TJ) includes Deterministic Jitter and Random Jitter (RJ). Total Jitter is specified at a BER of 10-12 for the same 2.5 GBd test pattern as for DJ. |
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