Manual

MAX3737
Multirate Laser Driver with Extinction
Ratio Control
6 _______________________________________________________________________________________
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.)
30
32
34
36
38
40
42
44
-20 200 406080100
TEMPERATURE COMPENSATION
vs. R
TH_TEMP
(R
MODTCOMP
= 10kΩ)
MAX3737 toc15
TEMPERATURE (°C)
I
MOD
(mA)
R
TH_TEMP
= 12kΩ
R
TH_TEMP
= 7kΩ
R
TH_TEMP
= 4kΩ
R
TH_TEMP
= 2kΩ
20ms/div
HOT PLUG WITH TX_DISABLE LOW
V
CC
FAULT
MAX3737 toc16
TX_DISABLE
LASER
OUTPUT
t_init = 60ms
3.3V
0V
LOW
LOW
20
µs/div
TRANSMITTER ENABLE
V
CC
FAULT
MAX3737 toc17
TX_DISABLE
LASER
OUTPUT
t_on = 75µs
3.3V
LOW
HIGH
LOW
40ns/div
TRANSMITTER DISABLE
V
CC
FAULT
MAX3737 toc18
TX_DISABLE
LASER
OUTPUT
3.3V
LOW
LOW
t_off = 134ns
HIGH
1µs/div
RESPONSE TO FAULT
V
PC_MON
FAULT
MAX3737 toc19
TX_DISABLE
LASER
OUTPUT
t_fault = 0.9µs
HIGH
EXTERNALLY
FORCED FAULT
LOW
LOW
100ms/div
FAULT RECOVERY TIME
V
PC_MON
FAULT
MAX3737 toc20
TX_DISABLE
LASER
OUTPUT
t_init = 68ms
LOW
EXTERNAL FAULT
REMOVED
LOW
HIGH
HIGH
LOW