+3.3V, 622Mbps SDH/SONET Laser Driver
with Automatic Power Control
__________________________________________Typical Operating Characteristics
(TA = +25°C, VCC = +3.3V, unless otherwise noted.)
EYE DIAGRAM
(622Mbps, 1300nm LASER,
470MHz FILTER)
223 - 1PRBS
IMOD = 15mA
DIFF. INPUT = 640mVp-p
EYE DIAGRAM
(622Mbps, 10Ω LOAD)
223 - 1PRBS
IMOD = 15mA
DIFF. INPUT = 1.7Vp-p
OUTPUT JITTER
(622Mbps, 10Ω LOAD)
IMOD = 20mA
DIFF. INPUT = 1.7Vp-p
∆RMS = 3.2ps
52mV/
div
20mV/
div
5mV/
div
180
160
140
120
100
80
60
40
20
0
200
161ps/div
IBIAS vs. RBIASSET
VIBIAS = 1.7V
10Ω LOAD
1k
10k
40k
RBIASSET (Ω)
IBIAS vs. RAPCSET
(VARYING MONITOR-TO-LASER
CURRENT GAIN)
80
70
GAIN = 90
60
50
GAIN = 60
40
30
GAIN = 30
20
GAIN = 15
10
0
1k
10k
40k
RAPCSET (Ω)
160
140
120
100
80
60
40
20
0
200
161ps/div
IQMOD vs. RMODSET
10Ω LOAD
1k
10k
40k
RMODSET (Ω)
PULSE-WIDTH DISTORTION
vs. TEMPERATURE
120
IMOD = 30mA
100
80
VCC = +3.3V
60
40
VCC = +5.0V
20
0
-40 -15 10
35
60
85
TEMPERATURE (°C)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1k
10ps/div
IMD vs. RAPCSET
APC LOOP CLOSED
RBIASSET = 2kΩ
RMODSET = 2kΩ
MONITOR-TO-LASER
CURRENT GAIN = 82
10k
40k
RAPCSET (Ω)
PULSE-WIDTH DISTORTION
vs. IMOD
120
100
80
VCC = +3.3V
60
40
VCC = +5.0V
20
0
10 15 20 25 30 35 40 45 50 55 60
IMOD (mA)
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