參數(shù)資料
型號： MAX3737ETJ
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 其它接口
英文描述： Full-Duplex LVDM Transceiver 8-MSOP -40 to 85
中文描述： SPECIALTY INTERFACE CIRCUIT, QCC32
封裝： 5 X 5 MM, 0.80 MM HEIGHT, TQFN-32
文件頁數(shù)： 10/17頁
文件大?。?/td> 920K
代理商： MAX3737ETJ
M
Safety Circuitry Current Monitors
The MAX3737 features monitors (MC_MON, BC_MON,
PC_MON) for modulation current (I
MOD
), bias current
(I
BIAS
), and photocurrent (I
MD
). The monitors are realized
by mirroring a fraction of the currents and developing volt-
ages across external resistors connected to ground.
Voltages greater than V
REF
at MC_MON, PC_MON, or
BC_MON result in a fault state. For example, connecting a
Multirate Laser Driver with Extinction
Ratio Control
10
______________________________________________________________________________________
1
If any of the I/O pins is shorted to GND or V
CC
(single-point failure; see Table 2), and the bias current or the photocurrent
exceed the programmed threshold.
2
3
End-of-life (EOL) condition of the laser diode. The bias current and/or the photocurrent exceed the programmed threshold.
Laser cathode is grounded and photocurrent exceeds the programming threshold.
4
No feedback for the APC loop (broken interconnection, defective monitor photodiode), and the bias current exceeds the
programmed threshold.
Table 1. Typical Fault Conditions
PIN
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 effect 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
This 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.
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,
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
MC_MON
Does not affect laser power.
Fault state* occurs.
Fault state* occurs.
Fault state* occurs.
Does not affect laser power.
Does not affect laser power.
Does not affect laser power.
Does not affect laser power.
APCFILT1
I
BIAS
increases until V
BC_MON
exceeds the threshold
voltage.
I
BIAS
increases until V
BC_MON
exceeds the threshold
voltage.
APCFILT2
I
BIAS
increases until V
BC_MON
exceeds the threshold
voltage.
I
BIAS
increases until V
BC_MON
exceeds the threshold
voltage.
MODSET
APCSET
*
A fault state asserts the TX_FAULT pin, disables the modulation and bias currents, and asserts the SHUTDOWN pin.
Does not affect laser power.
Does not affect laser power.
Fault state* occurs.
Fault state* occurs.
Table 2. Circuit Responses to Various Single-Point Faults
相關(guān)PDF資料
PDF描述
MAX3737 Multirate Laser Driver with Extinction Ratio Control
MAX3737EGJ Multirate Laser Driver with Extinction Ratio Control
MAX3740A Full-Duplex LVDM Transceiver 8-MSOP -40 to 85
MAX3740AETG Full-Duplex LVDM Transceiver 8-SOIC -40 to 85
MAX3740 Full-Duplex LVDM Transceiver 8-MSOP -40 to 85
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX3737ETJ+ 功能描述:激光驅(qū)動(dòng)器 Multirate w/Extinct Ratio Control 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
MAX3737ETJ+T 功能描述:激光驅(qū)動(dòng)器 Multirate w/Extinct Ratio Control 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
MAX3737ETJ-T 功能描述:激光驅(qū)動(dòng)器 Multirate w/Extinct Ratio Control 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
MAX3737EVKIT 功能描述:激光驅(qū)動(dòng)器 Evaluation Kit for the MAX3737 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
MAX3738ETG 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
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