M02094-12 Datasheet, PDF (37/46 Pages) M/A-COM Technology Solutions, Inc. – EPON FTTH modules

M02094-12
3.3 or 5 Volt VCSEL/FP Laser Driver IC for Applications to 2 Gbps
Rev V5
3.3.13
Current Monitors
To facilitate complying with laser safety and DDMI¹ requirements, output monitors are provided for transmit power
(TxPwr_MON), bias (BIAS_MON), and modulation current (MOD_MON).
These outputs will source current proportional to the emitted optical power (TxPwr_MON) the bias current (BIAS_MON)
and modulation current (MOD_MON).
To use these pins they should be terminated with a resistor to ground that sets the desired full-scale voltage (not to
exceed 2.5V).
If the outputs of these monitors are not needed, TxPwr_MON, BIAS_MON, and MOD_MON can all be left floating and the
chip current consumption will be reduced by the value of the monitor currents.
3.4
Laser Eye Safety
Using this laser driver in the manner described herein does not ensure that the resulting laser transmitter complies
with established standards such as IEC 825. Users must take the necessary precautions to ensure that eye safety
and other applicable standards are met. Note that determining and implementing the level of fault tolerance
required by the applications that this part is going into is the responsibility of the transmitter designer and manufac-
turer since the application of this device cannot be controlled by MACOM.
1 _{Digital Diagnostic Monitoring Interface for Optical Tranceivers, defined in SFF-8472.}
37
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