参数资料
| 型号： | MAX3737ETJ+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC LSR DRVR 2.7GBPS 3.63V 32TQFN |
| 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： | 47mA |
| 电流 - 调制： | 85mA |
| 电流 - 偏置： | 100mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
Multirate Laser Driver with Extinction
Ratio Control
I MOD = I MODS + K × I BIAS + I MODT
Current Compliance (I MOD > 60mA),
AC-Coupled
For applications requiring modulation current greater
I MODS = 268 ×
V REF
R MODSET
than 60mA, headroom is insufficient for proper opera-
tion of the laser driver if the laser is DC-coupled. To
avoid this problem, the MAX3737’s modulation output
I MODT = TC × ( T - T TH ) | T > T TH
I MODT = 0 | T ≤ T TH
An external resistor at the MODBCOMP pin sets current
proportional to I BIAS . Open circuiting the MODBCOMP
pin can turn off the interaction between I BIAS and I MOD :
can be AC-coupled to the cathode of a laser diode. An
external pullup inductor is necessary to DC-bias the
modulation output at V CC . Such a configuration isolates
laser forward voltage from the output circuitry and
allows the output at OUT+ to swing above and below
the supply voltage (V CC ). When AC-coupled, the
MAX3737 modulation current can be programmed up
to 85mA. Refer to Application Note 274: HFAN-02.0:
K =
1700
1000 + R MODBCOMP
± 10%
Interfacing Maxim Laser Drivers with Laser Diodes for
more information on AC-coupling laser drivers to laser
diodes.
For compliance:
× ( R D L
If I MOD must be increased from I MOD1 to I MOD2 to
maintain the extinction ratio at elevated temperature,
the required compensation factor is:
V OUT + = V C C -
I MOD
2
+ R
)
≥ 0 . 75 V
K = MOD 2
I - I MOD1
I BIAS 2 - I BIAS 1
A threshold for additional temperature compensation
can be set with a programming resistor at the
TH_TEMP pin:
Determine C APC
The APC loop filter capacitor C APC must be selected to
balance the requirements for fast turn-on and minimal
interaction with low frequencies in the data pattern. The
low-frequency cutoff is:
T TH = - 70 ° C +
1 . 45 M Ω
9 . 2 k Ω + R TH _ TEMP
° C ± 10 %
C APC ( μ F ) ≈
68
f 3 DB ( kHz )
× ( η × ρ MON ) 1 . 1
TC =
± 10 %
C MD ≈
V OUT + = V CC DIODE MOD ( D L ) BIAS L ≥ 0 . 7 V
The temperature coefficient of thermal compensation
above T TH is set by R MODTCOMP . Leaving the MODT-
COMP pin open disables additional thermal compensation:
1 mA
0 . 5 + R MODTCOMP ( k Ω ) ° C
Current Compliance (I MOD ≤ 60mA),
DC-Coupled
The minimum voltage at the OUT+ and OUT- pins is
0.7V.
For:
V DIODE —Diode bias point voltage (1.2V typ)
R L —Diode bias point resistance (5 Ω typ)
R D —Series matching resistor (20 Ω typ)
For compliance:
- V - I × R + R - I × R
High-frequency noise can be filtered with an additional
cap C MD from the MD pin to ground:
C APC
4
The MAX3737 is designed so that turn-on time is faster
than 1ms for most laser gain values ( η ? ρ MON ).
Choosing a smaller value of C APC reduces turn-on
time. Careful balance between turn-on time and low-fre-
quency cutoff may be needed at low data rates for
some values of laser gain.
Interface Models
Figures 6 and 7 show simplified input and output cir-
cuits for the MAX3737 laser driver. If dice are used,
replace package parasitic elements with bondwire par-
asitic elements.
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3737EVKIT | 功能描述:激光驱动器 Evaluation Kit for the MAX3737 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 |
| MAX3738ETG | 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 |
| MAX3738ETG+ | 功能描述:激光驱动器 155-4.25Gbps SFF/SFP w/Extinction RC 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 |
| MAX3738ETG+GD0 | 功能描述:激光驱动器 155Mbps to 4.25Gbps SFF/SFP Laser Driver with Extinction Ratio Control 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 |
| MAX3738ETG+T | 功能描述:激光驱动器 155-4.25Gbps SFF/SFP w/Extinction RC 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 |
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