Rainbow Electronics MAX3795 - Manual (Page 7)

MONITOR DIODE CURRENT
vs. TEMPERATURE
MAX3795 toc18
TEMPERATURE ( °C)
MONITOR DIODE CURRENT (
µ
A)
60 35 -15 10
125
150
175
200
225
250
275
300
100
-40 85
MAX3795
1Gbps to 4.25Gbps Multirate VCSEL Driver
with Diagnostic Monitors
_______________________________________________________________________________________ 7
HOT PLUG WITH TX_DISABLE LOW
MAX3795 toc19
20ms/div
TX_DISABLE
V CC
LASER
OUTPUT
FAULT
LOW
t_INIT = 60ms
3.3V
0V
LOW
STARTUP WITH SLOW RAMPING SUPPLY
MAX3795 toc20
20ms/div
TX_DISABLE
V CC
LASER
OUTPUT
FAULT
LOW
t_INIT = 62ms
3.3V
LOW
0V
FAULT RECOVERY TIME
MAX3795 toc24
40 µs/div
TX_DISABLE
V PWRMON
LASER
OUTPUT
FAULT
LOW
t_INIT = 54 µs
HIGH
EXTERNAL
FAULT
REMOVED
LOW
LOW
HIGH
FREQUENT ASSERTION OF TX_DISABLE
MAX3795 toc25
200 µs/div
TX_DISABLE
V PWRMON
LASER
OUTPUT
FAULT
EXTERNALLY
FORCED FAULT
Typical Operating Characteristics (continued)
(V
CC
= +3.3V, R
TC
= 0 Ω, PEAKSET open, measured electrically with a 50Ω load AC-coupled to OUT+, T
A
= +25 °C, unless otherwise
noted.)
TX_DISABLE NEGATE TIME
MAX3795 toc21
40 µs/div
TX_DISABLE
V CC
LASER
OUTPUT
FAULT
t_ON = 131 µs
3.3V
LOW
LOW
HIGH
TRANSMITTER DISABLE
MAX3795 toc22
1 µs/div
TX_DISABLE
V CC
LASER
OUTPUT
FAULT
LOW
t_OFF = 2.2 µs
3.3V
HIGH
LOW
RESPONSE TO FAULT
MAX3795 toc23
4 µs/div
TX_DISABLE
V PWRMON
LASER
OUTPUT
FAULT
LOW
t_FAULT = 2.16 µs
HIGH
EXTERNALLY
FORCED
FAULT
LOW