参数资料
| 型号： | MAX3735AETG+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 10/18页 |
| 文件大小： | 0K |
| 描述： | IC LSR DRVR 2.7GBPS 3.63V 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 激光二极管驱动器（光纤） |
| 数据速率： | 2.7Gbps |
| 通道数： | 1 |
| 电源电压： | 2.97 V ~ 3.63 V |
| 电流 - 电源： | 27mA |
| 电流 - 调制： | 85mA |
| 电流 - 偏置： | 100mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
2.7Gbps, Low-Power SFP Laser Drivers
V CC
SHUTDOWN
V CC
IN+
INPUT BUFFER
MAX3735
MAX3735A
15 ?
IN-
100 ?
V CC
I MD
1
DATA
PATH
V CC
V CC
I MOD
OUT-
OUT+
BIAS
R D
I BIAS
PC_MON
I MOD
ENABLE
I BIAS
ENABLE
V BG
APCSET
x38
R PC_MON
V CC
X270
I APCSET
R APCSET
BC_MON
I BIAS
76
V BG
SAFETY LOGIC
AND
POWER
DETECTOR
V CC
x1
MD
I MD
C MD
(4.7k ?
R BC_MON
TO 10k ? )
MODSET
APCFILT1
APCFILT2
R MODSET
TX_FAULT
TX_DISABLE
SHUTDOWN
C APC
Figure 4. Functional Diagram
Laser-Biasing and APC
To maintain constant average optical power, the
MAX3735/MAX3735A incorporate an APC loop to com-
pensate for the changes in laser threshold current over
temperature and lifetime. A back-facet photodiode
mounted in the laser package is used to convert the
optical power into a photocurrent. The APC loop
adjusts the laser bias current so that the monitor cur-
rent is matched to a reference current set by R APCSET .
The time constant of the APC loop is determined by an
external capacitor (C APC ). For possible C APC values,
see the Applications Information section.
Safety Circuitry
The safety circuitry contains an input disable
(TX_DISABLE), a latched fault output (TX_FAULT), and
fault detectors (Figure 5). This circuitry monitors the
operation of the laser driver and forces a shutdown if a
fault is detected (Table 1). A single-point fault can be a
short to V CC or GND. See Table 2 to view the circuit
response to various single-point failures. The transmit
fault condition is latched until reset by a toggle of
TX_DISABLE or V CC . The laser driver offers redundant
laser diode shutdown through the optional shutdown
circuitry (see the Typical Applications Circuit ). The
TX_FAULT pin should be pulled high with a 4.7k ? to
10k ? resistor to V CC as required by the SFP MSA.
Safety Circuitry Current Monitors
The MAX3735/MAX3735A feature monitors (BC_MON,
PC_MON) for bias current (I BIAS ) and photo current
(I MD ). The monitors are realized by mirroring a fraction
of the currents and developing voltages across external
resistors connected to ground. Voltages greater than
1.38V at PC_MON or BC_MON result in a fault state.
For example, connecting a 100 ? resistor to ground on
each monitor output gives the following relationships:
V BC_MON = (I BIAS / 76) x 100 ?
V PC_MON = I MD x 100 ?
10
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX3736ETE+ | IC LSR DRVR 3.2GBPS 3.63V 16TQFN |
| MAX3737ETJ+T | IC LSR DRVR 2.7GBPS 3.63V 32TQFN |
| MAX3738ETG+T | IC LASER DRIVER 4.25GBPS 24TQFN |
| MAX3740AETG+ | IC DRIVER SFP VCSEL 24-TQFN |
| MAX3766EEP+T | IC LASR DRVR 622MBPS 5.5V 20QSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3735AEVKIT | 功能描述:激光驱动器 Evaluation Kit for the MAX3735A RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3735E/D | 功能描述:激光驱动器 RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3735EGG | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX3735EGG-T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX3735ETG | 制造商:Maxim Integrated Products 功能描述:2.7GBPS, LOW-POWER SFP LASER DRIVER - Rail/Tube |
发布紧急采购，3分钟左右您将得到回复。