Datasheet

MAX3869
+3.3V, 2.5Gbps SDH/SONET Laser Driver
with Current Monitors and APC
4 _______________________________________________________________________________________
CLK
DATA
t
CLK
= 402ps
t
SU
t
H
Figure 3. Setup/Hold Time Definition
0.056µF
OUT+
BIAS
OUT-
A
B
A
A, B ARE SMD FERRITE BEADS:
B = BLM11A601S MURATA ELECTRONICS
A = BLM21A102S MURATA ELECTRONICS
B
V
CC
50Ω
15Ω
OSCILLOSCOPE
50Ω
25Ω
0.056µF
V
CC
MAX3869
I
OUT
+
Figure 2. Output Termination for Characterization
Typical Operating Characteristics
(V
CC
= +3.3V, load as shown in Figure 2, T
A
= +25°C, unless otherwise noted.)
EYE DIAGRAM
(2.488Gbps, 1300nm FP LASER,
1.87GHz FILTER, 32 TQFP-EP)
MAX3869-01
48ps/div
MITSUBISHI ML725C8F LASER DIODE
0
5
15
10
20
25
84
83
87
32 TQFP-EP
I
MOD
= 30mA
MEAN = 87.3ps
σ = 1.6ps
88 90
89
8685
91
92
TYPICAL DISTRIBUTION OF FALL TIME
MAX3869-02
FALL TIME (ps)
PERCENT OF UNITS (%)
0
5
20
15
10
30
25
35
114.5
113
119
32 TQFP-EP
I
MOD
= 60mA
V
CC
= 3.14V
T
A
= +85°C
MEAN = 119.1ps
σ = 2.0ps
120.5 123.5
122
117.5116
125
126.5
DISTRIBUTION OF FALL TIME
(WORST-CASE CONDITIONS)
MAX3869-03
FALL TIME (ps)
PERCENT OF UNITS (%)