MAX3941 Datasheet, PDF (10/11 Pages) Maxim Integrated Products – 10Gbps EAM Driver with Integrated Bias Network

10Gbps EAM Driver with Integrated
Bias Network
RTEN
MODEN
PLRT
GND GND1
GND2
50Ω
50Ω
50Ω
R_OUT
50Ω
50Ω
50Ω
OUT
CLK+
CLK-
V_EE
Z_L
DQ
0
POLARITY
DATA+
DATA-
MUX
PWC
1
50Ω
50Ω
MAX3941
I_MOD
I_BIAS
V_EE
V_EE
Figure 6. Functional Diagram
PWC+
PWC-
2kΩ
V_EE
MODSET
+
V_MODSET
-
BIASSET
+
V_BIASSET
-
V_EE
V_EE
Interface Schematics
Figures 7 and 8 show simplified input and output cir-
cuits of the MAX3941 EAM driver.
Exposed-Pad Package
The exposed pad on the 24-pin QFN provides a very low
thermal-resistance path for heat removal from the IC. The
pad is also electrically ground on the MAX3941 and must
be soldered to the circuit board for proper thermal and
electrical performance. Refer to Maxim Application Note
HFAN-08.1: Thermal Considerations for QFN and Other
Exposed-Pad Packages for additional Information.
Laser Safety and IEC 825
Using the MAX3941 EAM driver alone does not ensure
that a transmitter design is compliant with IEC 825. The
entire transmitter circuit and component selections must
be considered. Each customer must determine the level
of fault tolerance required by their application, recogniz-
ing that Maxim products are not designed or authorized
for use as components in systems intended for surgical
implant into the body, for applications intended to sup-
port or sustain life, or for any other application where the
failure of a Maxim product could create a situation where
personal injury or death may occur.
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