M02061 Datasheet, PDF (26/37 Pages) M/A-COM Technology Solutions, Inc. – 3.3 or 5 Volt Laser Driver

Functional Description
Figure 3-5. TC Slope Compensation Behavior
60.00
50.00
40.00
30.00
20.00
10.00
0.00
-40
-20
-10.00
-20.00
-30.00
0
20
40
60
Ambient Temperature in degrees C
RTCslope:
22k
27k
33k
39k
47k
51k
62k
75k
82k
100k
120k
150k
220k
390k
750k
open
80
100
3.3.6
Modulator Output
The output stage is designed to drive a 25Ω output load over a wide range of currents and circuit architectures. The
laser may be AC, DC, or Differentially coupled depending on the supply voltage.
Table 3-2. Modulation Current Maximums
Max
Modulation Current
Max Bias Current
V_CC=5V, Laser DC coupled
V_CC=5V, Laser AC coupled
V_CC=3.3V, Laser DC coupled
80
60
80⁽¹⁾
60
100⁽²⁾
100
V_CC=3.3V, Laser AC coupled
100
100
When differentially coupling, the maximum modulation and bias current is determined by either the AC or DC coupling of the OUT+ or OUT- output,
whichever has the minimum rating.
1. When AC coupling the output should never be allowed to swing above the absolute voltage rating of the part, which is 6V.
2. When V_CC=3.3V, the OUT+ and OUT- should not be driven below 1.6V. In most 3.3V applications, this will make DC coupling impractical.
02061-DSH-001-G
Mindspeed Technologies^®
26
Mindspeed Proprietary and Confidential