M02067_17 Datasheet, PDF (15/20 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
3.8
Temperature Compensation
The M02067 features built in temperature compensation of the modulation current is set using two external
resistors, TC_SLOPE and TC_START see Figure 3-8.
Current pulled from TC_SLOPE adjusts the slope of the temperature compensation whereas current pulled from
TC_START sets the threshold temperature for the coefficient.
Figure 3-8. Temperature Compensation
80mA
R_MPCSET
Δ1
TC_SLOPE
Δ2
-40°C
0mA
TC_START
+80°C
Figures 3-9 through 3-11 show I_MOD temperature compensation using a combination of resistor values for
RTC_SLOPE and RTC_START.
15
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