參數(shù)資料
型號(hào)： MAX3766
廠商： Maxim Integrated Products, Inc.
英文描述： Quad LVDS Transmitter with Flow-Through Pinout 16-TSSOP -40 to 85
中文描述： 622Mbps、LAN/WAN激光驅(qū)動(dòng)器，帶有自動(dòng)功率控制及安全關(guān)斷
文件頁(yè)數(shù)： 13/20頁(yè)
文件大小： 250K
代理商： MAX3766
Calc ulate Power Consumption
The MAX3766’s junction temperature must be kept
below +150°C at all times. Calculate total power dissi-
pated on the MAX3766 by laser power as follows:
Power = V
CC
(I
CC
+ I
BIAS
+ I
MOD
)
- (I
MOD
/ 2 + I
BIAS
) V
LASER
.
where I
BIAS
is the maximum bias current allowed by
R
BIASMAX
, I
MOD
is the AC modulation current, V
LASER
is the typical laser forward voltage.
J unction temperature = power (Watts)
110 (°C/W).
__________Applic ations Information
Optic al Power Relations
Many MAX3766 specifications relate to output current
amplitude. When working with fiber optic transmitters,
the output is normally expressed in terms of average
optical power and extinction ratio (Figure 8). Table 2
lists relations that are helpful in converting optical
power to output signal amplitude when designing with
the MAX3766. The relations are true if the average duty
cycle of the input data is 50%.
Input T erminations
The MAX3766’s data inputs must be biased externally.
Refer to Figure 9 for common input terminations.
Laser S afety and IEC 825
The International Electrotechnical Commission (IEC)
determines standards for hazardous light emissions
from fiber optic transmitters. Specification IEC 825
defines the maximum light output for various hazard
levels. The MAX3766 provides features that aid compli-
ance with IEC 825.
A common safety requirement is single-point fault toler-
ance, whereby one unplanned short, open, or resistive
connection does not cause excess light output. When
the MAX3766 is used in the latched shutdown configu-
ration, as shown in Typical Application Circuits, the cir-
cuit responds as shown in Table 3.
Using the MAX3766 laser 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.
M
622Mbps LAN/WAN Laser Driver with
Automatic Power Control and S afety S hutdown
______________________________________________________________________________________
13
500ps/div
CORRECTLY COMPENSATED
UNCOMPENSATED
OVERCOMPENSATED
Figure 7. Example Laser Compensation
TIME
P0
P1
OPTICAL
POWER
P
AVE
Figure 8. Optical Power Relations
SYMBOL
RELATION
Average
Power
P
AVE
Extinction
Ratio
r
e
PARAMETER
Optical Power
of a “1”
P1
Optical Power
of a “0”
P0
Signal
Amplitude
P
INPUT
P
= P0 + P1
AVE
)
/2
r = 1 / P0
P
P
r
r
AVE
e
+
(
e
1
2
1
=
P
P
r
AVE
e
0
2
1
=
+
)
/
P
P1 - P0
2P
r -1
r
e
1
INPUT
AVE
=
=
+
Table 2. Optical Power Definitions
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參數(shù)描述
MAX3766E/D 功能描述:激光驅(qū)動(dòng)器 RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube
MAX3766E/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX3766EEP 功能描述:激光驅(qū)動(dòng)器 622Mbps LAN/WAN RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube
MAX3766EEP+ 功能描述:激光驅(qū)動(dòng)器 622Mbps LAN/WAN RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube
MAX3766EEP+T 功能描述:激光驅(qū)動(dòng)器 622Mbps LAN/WAN RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube
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