参数资料
| 型号： | DS1861E+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/25页 |
| 文件大小： | 0K |
| 描述： | IC LASR CTRLR 1CHAN 5.5V 14TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 96 |
| 类型： | 激光二极管控制器（光纤） |
| 通道数： | 1 |
| 电源电压： | 2.85 V ~ 5.5 V |
| 电流 - 电源： | 5mA |
| 工作温度： | -40°C ~ 95°C |
| 封装/外壳： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
Full Laser Control with Fault Management
Once the extinction ratio is expressed as a function of
the average power and the modulation power, the
equation can then be written in terms of the modulation
and average power currents. The modulation current
(I MOD ) is defined as the difference between the I 1 and
I 0 currents (I MOD = I 1 - I 0 ). The average power current
(I APC ) is the arithmetic mean of the I 1 and I 0 currents
referenced to the threshold current (I APC = 1 / 2 I 1 +
I DIST
1
f ERU
1 / 2 I 0 - I TH ). After defining these currents, the equation
can now be rewritten as the following equations.
+ I
I APC MOD
I APC ? I MOD
1 + × MOD
×
TIME
Extinction Ratio =
1
2
1
2
=
1 ?
1 I
2 I APC
1 I MOD
2 I APC
Figure 9. BMD Disturbance Current
The APC loop is already controlling I APC to keep the
average power at a constant value, so the DS1861 out-
puts I MODSET so that I MOD /I APC remains constant to
control the extinction ratio. The DS1861 determines the
I 1
I MOD
P1
I MOD
I MOD /I APC ratio according to the following formula,
where N is a variable gain that can be used to adjust
the extinction ratio.
2
AVERAGE
POWER
2
P MOD
I MOD
I APC
=
N
30
x
A M
A D
Substituting into the previous extinction ratio equation
I 0
yields the extinction ratio as a function of N.
× × M
× ×
60 + N M
A M
I TH
P0
I APC
CURRENT (mA)
I MOD
Extinction Ratio =
1 +
1 ?
1 N A
2 30 A D
1 N A M
2 30 A D
=
60 ? N
A
A D
A D
Figure 10. Laser Diode Bias Current Definitions
14
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| DS1861E+ | 功能描述:激光驱动器 Closed Loop Laser 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 |
| DS1862 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:XFP Laser Control and Digital Diagnostic IC |
| DS1862A | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:XFP Laser Control and Digital Diagnostic IC |
| DS1862AB+ | 功能描述:激光驱动器 XFP Laser Control & Digital Diagnostic 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 |
| DS1862AB+T&R | 制造商:Maxim Integrated Products 功能描述:XFP LASER CONTROL 25CSBGA - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC LASR CTRLR 7CHAN 5.5V 25CSBGA |
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