参数资料
| 型号： | DS1861E+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 24/25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
Applications Information
Calibrating APC and Extinction Ratio
Before calibrating, the APC register should be set to a
low value to ensure the laser’s maximum power level is
not exceeded before the power level is calibrated.
Additionally, the ER register should be set to its mini-
mum value (28 decimal) to ensure that a data test pat-
tern does not cause the laser to shut off. Once the APC
and ER registers are at minimal values, enable a data
pattern and calibrate the average power level first.
Calibrating the Average Power Level
While sending data through the laser diode, increase
the value in the APC register until the light output
matches the desired average power level. The average
power level is the arithmetic average of the 1 and 0
power levels.
Calibrating the Extinction Ratio
While sending data through the laser diode, begin
increasing the ER register from its minimum value of 28
decimal (1Ch), until the proper extinction ratio is
reached or the maximum setting (104 decimal or 68h)
of the low range is reached. If the maximum low range
value is reached, write the ER register to 156 decimal
(9Ch), which switches the extinction ratio value to the
minimum value of the high range. Continue increasing
the ER setting until the proper extinction ratio is
reached. If the maximum value of the high range set-
ting is reached (232 decimal or E8h) without reaching
the proper extinction ratio, then either the desired
extinction ratio cannot be reached or a problem is pre-
venting the system from operating properly.
Addressing Multiple DS1861s
on a Common I 2 C Bus
Up to eight DS1861s can be addressed on a single I 2 C
bus by using the device’s address inputs (A 2 , A 1 , A 0 ) to
change its slave address. For information about device
addressing, see the I 2 C Communications s ection.
Power-Supply Decoupling
To achieve best results, it is recommended that the power
supply is decoupled with a 0.01μF or a 0.1μF capacitor.
Use high-quality, ceramic, surface-mount capacitors, and
mount the capacitors as close as possible to the V CC and
GND pins to minimize lead inductance.
BMD Shunt Capacitor
The BMD shunt capacitor works with the internal resis-
tance of the BMD input to provide a lowpass filter that
reduces the effects of noise on the APC loop. Its
capacitance value must be chosen carefully to ensure
that it is both large enough to provide good filtering of
high-frequency noise and small enough that it does not
cause the control loop to become unstable. A 1nF, 10%
tolerant, X7R ceramic capacitor is recommended.
SDA and SCL Pullup Resistors
SDA is an open-collector bidirectional data pin on the
DS1861 that requires a pullup resistor to realize high
logic levels. Either an open-collector output with a
pullup resistor or a push-pull output driver can be used
for the SCL input. Pullup resistor values should be cho-
sen to ensure that the rise and fall times listed in the AC
Electrical Characteristics table are within specification.
24
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| DS1873T+ | IC CTLR SFP+ ANLG LDD 28-TQFN |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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