Datasheet

MAX3996
3.0V to 5.5V, 2.5Gbps VCSEL
and Laser Driver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 3.0V to 5.5V, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at V
CC
= 3.3V, TC pin not connected, T
A
=
+25°C.) (Figure 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage at V
CC
...........................................-0.5V to +7.0V
Voltage at TX_DISABLE, PORDLY, MON1, COMP,
IN+, IN-, MD, BIAS, MODSET, TC..........-0.5V to (V
CC
+ 0.5V)
Voltage between COMP and MON2 .....................................2.3V
Voltage between IN+ and IN- ..................................................5V
Voltage at OUT+, OUT-.........................(V
CC
- 2V) to (V
CC
+ 2V)
Voltage between MON1 and MON2 .....................................1.5V
Voltage between BIAS and MON2...........................................4V
Current into FAULT, SHDNDRV ..........................-1mA to +25mA
Current into OUT+, OUT- ....................................................60mA
Current into BIAS ..............................................................120mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin QFN (derate 20mW/°C)...................................1600mW
Operating Ambient Temperature Range .............-40°C to +85°C
Operating Junction Temperature Range...........-40°C to +150°C
Storage Temperature Range.... .........................-55°C to +150°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
CC
= 3.3V, I
MOD
= 15mA 47
Supply Current
I
CC
(Figure1)
(Note 1)
V
CC
= 5.5V, I
MOD
= 30mA,
R
MODSET
= 2.37kΩ
52 75
mA
Data Input Voltage Swing V
ID
Total differential signal (Figure 2)
200 2200
mV
P-P
TX_DISABLE Input Current 0 < V
PIN
< V
CC
-100 +100
µA
TX_DISABLE Input High Voltage
V
IH
2.0 V
TX_DISABLE Input Low Voltage
V
IL
0.8 V
FAULT Output High Voltage V
OH
I
OH
= -100µA, 4.7kΩ < R
FAULT
< 10kΩ 2.4 V
FAULT Output Low Voltage V
OL
I
OL
= 1mA 0.4 V
BIAS GENERATOR
Minimum Bias Current I
BIAS
Current into BIAS pin 1 mA
Maximum Bias Current I
BIAS
Current into BIAS pin 60 mA
APC loop is closed
1.04 1.12
FAULT = high
V
CC
- 0.73
MD Quiescent Voltage V
MD
TX_DISABLE = high
V
CC
- 0.73
V
Monitor Resistance R
MON
(Figure 4) 9.3 11
12.7
Ω
MD Input Current FAULT = low, TX_DISABLE = low -3
+0.8
+3 µA
BIAS Current During Fault
I
BIAS_OFF
10 µA
APC Time Constant C
COMP
= 0.1µF 35 µs
POWER-ON RESET (POR)
POR Threshold Measured at V
CC
2.65
2.7 3.0 V
PORDLY = open (Note 3) 30 55 µs
POR Delay
t
PORDLY
C
PORDLY
= 0.001µF (Note 3) 1.7 2.4 ms
POR Hysteresis 20 mV
SHUTDOWN
I
SHDNDRV
= 10µA, FAULT = high
V
CC
- 0.4
I
SHDNDRV
= 1mA, FAULT = low
V
CC
- 2.4
Voltage at SHDNDRV
I
SHDNDRV
= 15mA, FAULT = low 0
V
CC
- 1.2
V
LASER MODULATOR
Data Rate
< 3.2
Gbps