M02061_17 Datasheet, PDF (23/45 Pages) M/A-COM Technology Solutions, Inc. – 3.3 or 5 Volt Laser Driver

M02061-12/-21
3.3 or 5 Volt Laser Driver
Rev V6
3.0 Functional Description
3.1
Overview
The M02061 is a highly integrated, programmable laser driver intended for SFP/SFF module with data rates up to
4.25 Gbps. Using differential PECL data inputs, the M02061 supplies the bias and modulation current required to
drive an edge-emitting laser.
Monitor outputs and internal safety logic in the M02061 combined with the M02088 will support designs requiring
DDMI compliance.
The M02061 includes automatic power control to maintain a constant average laser output power over temperature
and life. In addition, the modulation current can be temperature compensated to minimize variation in extinction
ratio over temperature.
Many features are user-adjustable, including the APC (automatic power control) loop bias control (via a monitor
photo diode), modulation current, temperature compensation control of modulation current, and pulse-width
adjustment. The part may be operated from a 3.3V or 5V supply.
The driver modulation output can be AC, DC, or Differentially coupled to the laser.
Safety circuitry is also included to provide a latched shut-down of laser bias and modulation current if a fault
condition occurs. An internal V_CC switch provides redundant shutdown when operating the device from a 3.3V
supply. Control is provided to allow for a redundant external switch when operating with a 5V supply, if desired.
Figure 3-1 details the functional blocks and pin signals for the M02061 device.
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