Datasheet

MAX3735/MAX3735A
2.7Gbps, Low-Power SFP Laser Drivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.97V to +3.63V, T
A
= -40°C to +85°C. Typical values at V
CC
= +3.3V, I
BIAS
= 20mA, I
MOD
= 30mA, T
A
= +25°C, unless
otherwise noted.) (Note 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, V
CC
..............................................-0.5V to +6.0V
Current into BIAS, OUT+, OUT-......................-20mA to +150mA
Current into MD.....................................................-5mA to +5mA
Voltage at IN+, IN-, TX_DISABLE, TX_FAULT,
SHUTDOWN...........................................-0.5V to (V
CC
+ 0.5V)
Voltage at BIAS, PC_MON, BC_MON,
MODSET, APCSET .................................-0.5V to (V
CC
+ 0.5V)
Voltage at OUT+, OUT-.............................+0.5V to (V
CC
+ 1.5V)
Voltage at APCFILT1, APCFILT2..............................-0.5V to +3V
Continuous Power Dissipation (T
A
= +85°C )
24-Lead Thin QFN (derate 20.8mW/°C
above +85°C).............................................................1354mW
24-Lead QFN (derate 20.8mW/°C
above +85°C).............................................................1354mW
Operating Ambient Temperature Range (T
A
)......-40°C to +85°C
Storage Ambient Temperature Range...............-55°C to +150°C
Die Attach Temperature...................................................+400°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYM B O L
CONDITIONS
MIN TYP MAX
UNITS
POWER SUPPLY
Power-Supply Current I
CC
Excludes the laser bias and modulation
currents (Note 2)
27 50 mA
I/O SPECIFICATIONS
Differential Input Voltage V
ID
V
ID
= (V
IN
+) - (V
IN
-), Figure 1
200 2400
mV
P-P
Common-Mode Input Voltage 0.6 × V
CC
V
Differential Input Resistance 85
100
115 Ω
TX_DISABLE Input Pullup
Resistance
R
PULL
4.7 7.4
10.0
kΩ
V
HIGH
= V
CC
15
TX_DISABLE Input Current
V
LOW
= GND, V
CC
= 3.3V, R
PULL
= 7.4kΩ
-450
µA
TX_DISABLE Input High Voltage
V
IH
2V
TX_DISABLE Input Low Voltage V
IL
0.8 V
TX_FAULT Output High Voltage V
OH
I
OH
= 100µA sourcing (Note 3) 2.4 V
TX_FAULT Output Low Voltage V
OL
I
OL
= 1mA sinking (Note 3) 0.4 V
SHUTDOWN Output High Voltage
V
OH
I
OH
= 100µA sourcing V
CC
- 0.4 V
SHUTDOWN Output Low Voltage
V
OL
I
OL
= 100µA sinking 0.4 V
BIAS GENERATOR
Bias On-Current Range I
BIAS
Current into BIAS pin 1 100 mA
Bias Off-Current
I
BIASOFF
Current into BIAS pin during TX_FAULT or
TX_DISABLE
100 µA
Bias Overshoot
During SFP module hot plugging
(Notes 4, 5, 11)
10 %
External resistor to GND defines the voltage
gain, I
BIAS
= 1mA, R
BC_MON
= 69.28kΩ
10.0
12
13.5
Bias-Current Monitor Gain
I
BC_MON
I
BIAS
= 100mA, R
BC_MON
= 693.25Ω
11.5
13
13.5
mA/A
MAX3735 -8 +8
Bias-Current Monitor Gain
Stability
1mA ≤ I
BIAS
≤ 100mA
(Notes 4, 6)
MAX3735A -6 +6
%