Datasheet

MAX3656
155Mbps to 2.5Gbps Burst-Mode
Laser Driver
_______________________________________________________________________________________ 5
Figure 1. Enable and Disable Delay Times
BEN+
BEN-
ENABLE DELAY
DISABLE DELAY
BEN ±MIDPOINT
I
FINAL
× 110%
I
FINAL
I
FINAL
× 90%
10% OF I
BIAS
I
BIAS
+
I
MOD
Figure 2. Output Termination for Characterization
OUT-
OUT+
BIAS+
BIAS-
V
CC
V
CC
V
CC
V
CC
22.1Ω
49.9Ω
50Ω
22.1Ω
26.7Ω
50Ω
121Ω
OSCILLOSCOPE
26.7Ω
35.7Ω
I
MOD
I
BIAS
MAX3656
Z
0
= 50Ω
Z
0
= 50Ω
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
OPTICAL EYE DIAGRAM
(155.52Mbps, 117MHz FILTER,
PATTERN = 2
23
- 1 PRBS)
MAX3656 toc01
EXCELIGHT SLT2886-LR LASER
AVERAGE OPTICAL POWER = -6dBm
EXTINCTION RATIO = 15dB
MASK MARGIN = 45%
OPTICAL EYE DIAGRAM
(622.08Mbps, 467MHz FILTER,
PATTERN = 2
23
- 1 PRBS)
MAX3656 toc02
EXCELIGHT SLT2886-LR LASER
AVERAGE OPTICAL POWER = -6dBm
EXTINCTION RATIO = 15dB
MASK MARGIN = 40%
OPTICAL EYE DIAGRAM
(1.24416Gbps, 933MHz FILTER,
PATTERN = 2
23
- 1 PRBS)
MAX3656 toc03
EXCELIGHT SLT2886-LR LASER
AVERAGE OPTICAL POWER = -6dBm
EXTINCTION RATIO = 12dB
MASK MARGIN = 31%