155Mbps to 622Mbps SFF/SFP
Laser Driver with Extinction Ratio Control
Typical Operating Characteristics
(V
CC
= +3.3V, C
= 0.01µF, I
= 20mA, I
= 30mA, T = +25°C, unless otherwise noted.)
APC
BIAS
MOD
A
OPTICAL EYE DIAGRAM
OPTICAL EYE DIAGRAM
ELECTRICAL EYE DIAGRAM
(622.08Mbps, 27 - 1 PRBS, 467MHz FILTER)
(155Mbps, 27 - 1 PRBS, 117MHz FILTER)
(I
= 30mA, 622.08MHz, 27 - 1 PRBS)
MOD
MAX3646 toc01
MAX3646 toc02
MAX3646 toc03
1310nm FP LASER
1310nm FP LASER
2pF BETWEEN OUT+
AND OUT-
r = 8.2dB
e
r = 8.2dB
e
MAX346
75mV/div
270ps/div
1ns/div
320ps/div
SUPPLY CURRENT (I ) vs. TEMPERATURE
CC
(EXCLUDES BIAS AND MODULATION CURRENTS)
BIAS-CURRENT MONITOR RATIO
vs. TEMPERATURE
PHOTOCURRENT MONITOR RATIO
vs. TEMPERATURE
60
90
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
88
86
84
82
80
78
76
74
72
70
55
3.63V
50
45
2.97V
3.3V
40
35
30
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
DETERMINISTIC JITTER vs.
MODULATION CURRENT
MODULATION CURRENT vs. R
MODSET
PHOTODIODE CURRENT vs. R
APCSET
90
80
70
60
50
40
30
20
10
0
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
100
90
80
70
60
50
40
30
20
155mbps
1
10
100
0.1
1
10
100
0
10 20 30 40 50 60 70 80 90
(mA)
R
(kΩ)
R
(kΩ)
I
MODSET
APCSET
MOD
4
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