參數(shù)資料
型號(hào)： MAX3735A
廠商： Maxim Integrated Products, Inc.
英文描述： 2.7Gbps. Low-Power SFP Laser Drivers
中文描述： 2.7Gbps、低功耗、SFP激光驅(qū)動(dòng)器
文件頁數(shù)： 12/18頁
文件大?。?/td> 1734K
代理商： MAX3735A
M
2.7Gbps, Low-Power SFP Laser Drivers
12
______________________________________________________________________________________
Pattern-Dependent Jitter
To minimize the pattern-dependent jitter associated
with the APC loop time constant, and to guarantee loop
stability, connect a capacitor between APCFILT1 and
APCFILT2 (see the
Applications Information
section for
more information about choosing C
APC
values). A
capacitor attached to the photodiode anode (C
MD
) is
also recommended to filter transient currents that origi-
nate from the photodiode. To maintain stability and
proper phase margin associated with the two poles
created by C
APC
and C
MD
, C
APC
should be 20x
greater than C
MD
for the MAX3735. C
APC
should be 4x
to 20x greater than C
MD
for the MAX3735A.
Table 2. Circuit Responses to Various Single-Point Faults
PIN NAME
CIRCUIT RESPONSE TO OVERVOLTAGE
OR SHORT TO V
CC
Does not affect laser power.
Modulation and bias currents are disabled.
CIRCUIT RESPONSE TO UNDERVOLTAGE
OR SHORT TO GROUND
TX_FAULT
TX_DISABLE
Does not affect laser power.
Normal condition for circuit operation.
IN+
The optical average power increases and a fault occurs
if V
PC_MON
exceeds the threshold. The APC loop
responds by decreasing the bias current.
The optical average power decreases and the APC
loop responds by increasing the bias current. A fault
state occurs if V
BC_MON
exceeds the threshold voltage.
IN-
The optical average power decreases and the APC
loop responds by increasing the bias current. A fault
state occurs if V
BC_MON
exceeds the threshold voltage.
The optical average power increases and a fault occurs
if V
PC_MON
exceeds the threshold. The APC loop
responds by decreasing the bias current.
MD
Disables bias current. A fault state occurs.
The APC circuit responds by increasing bias current
until a fault is detected, then a fault state* occurs.
SHUTDOWN
Does not affect laser power. If the shutdown circuitry is
used, laser current is disabled and a fault state* occurs.
Does not affect laser power.
BIAS
In this condition, laser forward voltage is 0V and no light
is emitted.
Fault state* occurs. If the shutdown circuitry is used, the
laser current is disabled.
OUT+
The APC circuit responds by increasing the bias current
until a fault is detected, then a fault state* occurs.
Fault state* occurs. If the shutdown circuitry is used,
laser current is disabled.
OUT-
PC_MON
BC_MON
Does not affect laser power.
Fault state* occurs.
Fault state* occurs.
Does not affect laser power.
Does not affect laser power.
Does not affect laser power.
APCFILT1
IBIAS increases until V
BC_MON
exceeds the threshold
voltage.
IBIAS increases until V
BC_MON
exceeds the threshold
voltage.
APCFILT2
IBIAS increases until V
BC_MON
exceeds the threshold
voltage.
IBIAS increases until V
BC_MON
exceeds the threshold
voltage.
MODSET
APCSET
Does not affect laser power.
Does not affect laser power.
Fault state* occurs.
Fault state* occurs.
*
A fault state asserts the TX_FAULT pin, disables the modulation and bias currents, and asserts the SHUTDOWN pin.
Table 3. Optical Power Definitions
PARAMETER
Average Power
Extinction Ratio
Optical Power High
Optical Power Low
Optical Amplitude
SYMBOL
P
AVG
r
e
P
1
P
0
P
P-P
RELATION
P
AVG
= (P
0
+ P
1
) / 2
r
e
= P
1
/ P
0
P
1
= 2P
AVG
x r
e
/ (r
e
+ 1)
P
0
= 2P
AVG
/ (r
e
+ 1)
P
P-P
= P
1
- P
0
Laser Slope
Efficiency
η
η
= P
P-P
/ I
MOD
Modulation Current
I
MOD
I
MOD
= P
P-P
/
η
相關(guān)PDF資料
PDF描述
MAX3735AETG 2.7Gbps, Low-Power SFP Laser Drivers
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX3735AE/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
MAX3735AE/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX3735AEGG 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
MAX3735AEGG-T 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
MAX3735AETG 功能描述:激光驅(qū)動(dòng)器 2.7Gbps Low-Power SFP Laser Driver 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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