Manual

MAX3738
1Gbps to 2.7Gbps SFF/SFP Laser Driver with
Extinction Ratio Control
_______________________________________________________________________________________ 5
RANDOM JITTER
vs. MODULATION CURRENT
MAX3738 toc10
I
MOD
(mA)
RJ (ps
RMS
)
807050 6020 30 4010
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
090
COMPENSATION (K) vs. R
MODBCOMP
MAX3738 toc11
R
MODBCOMP
(k
Ω
)
K (mA/mA)
1010.10.01
0.1
1
10
0.01
0.001 100
TEMPERATURE COMPENSATION vs.
R
TH_TEMP
(R
MODTCOMP
= 500Ω)
MAX3738 toc12
TEMPERATURE (
°
C)
I
MOD
(mA)
80706050403020100
40
50
60
70
80
90
100
30
-10 90
R
TH_TEMP
= 12k
Ω
R
TH_TEMP
= 7k
Ω
R
TH_TEMP
= 4k
Ω
R
TH_TEMP
= 2k
Ω
TEMPERATURE COMPENSATION vs.
R
TH_TEMP
(R
MODTCOMP
= 10kΩ)
MAX3738 toc13
TEMPERATURE (
°
C)
I
MOD
(mA)
80706050403020100
32
34
36
38
40
42
44
30
-10 10090
R
TH_TEMP
= 12k
Ω
R
TH_TEMP
= 7k
Ω
R
TH_TEMP
= 4k
Ω
R
TH_TEMP
= 2k
Ω
HOT PLUG WITH TX_DISABLE LOW
MAX3738 toc14
20ms/div
V
CC
FAULT
TX_DISABLE
LASER
OUTPUT
0V
3.3V
t_init = 59.6ms
LOW
LOW
TRANSMITTER ENABLE
MAX3738 toc15
10
µ
s/div
V
CC
FAULT
TX_DISABLE
LASER
OUTPUT
3.3V
t_on = 23.8
µ
s
LOW
HIGH
LOW
TRANSMITTER DISABLE
MAX3738 toc16
20ns/div
V
CC
FAULT
TX_DISABLE
LASER
OUTPUT
3.3V
91.2ns
LOW
HIGH
LOW
RESPONSE TO FAULT
MAX3738 toc17
400ns/div
V
PC_MON
FAULT
TX_DISABLE
LASER
OUTPUT
t_fault = 160ns
EXTERNALLY
FORCED FAULT
FAULT RECOVERY TIME
MAX3738 toc18
40ms/div
V
PC_MON
FAULT
TX_DISABLE
LASER
OUTPUT
t_init = 58ms
EXTERNALLY
FORCED FAULT
LOW
LOWLOW
HIGH
HIGH
Typical Operating Characteristics (continued)
(V
CC
= +3.3V, C
APC
= 0.01µF, I
BIAS
= 20mA, I
MOD
= 30mA, T
A
= +25°C, unless otherwise noted.)