M02067_17 Datasheet, PDF (13/20 Pages) M/A-COM Technology Solutions, Inc. – 3.3 Volt Laser Driver IC for GbE and Fibre Channel to 2.1 Gbps

M02067 -12/-13
3.3 Volt Laser Driver IC for GbE and Fibre Channel to 2.1 Gbps
Rev V4
Figure 3-6. Bias Current vs. R_MPCSET
120
100
80
60
40
20
0
0 5000 10000 15000 20000 25000 30000 35000
R_MPCSET Ω
-40
0
25
50
85
Symbols shown indicate °C
There are two safety features integrated into the MPC loop; an Over-Current Alarm and an MPC loop failure alarm.
The Over-Current Alarm (OCA) circuit limits the maximum bias current generated by the M02067. The bias current
limit is set by an external resistor to ground, R_OCA. When this limit is exceeded the OCA pin is asserted LOW.
Figure 3-7 shows the maximum bias current limit vs R_OCA.
Figure 3-7. Maximum Bias Current vs. ROCA
100
90
80
70
60
50
40
30
20
10
0
0
10000 20000
R_OCA (Ω )
30000
40000
13
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