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ADN2847ACP-32

更新时间： 2024-01-12 01:29:38
品牌 Logo 应用领域
亚德诺 - ADI 驱动器二极管激光二极管接口集成电路
页数 文件大小 规格书
12页 403K
描述
3 V Dual-Loop 50 Mbps to 3.3 Gbps Laser Diode Driver

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ADN2847ACP-32 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：QFN包装说明：HVQCCN, LCC32,.2SQ,20
针数：32Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.08接口集成电路类型：INTERFACE CIRCUIT
JESD-30 代码：S-XQCC-N32JESD-609代码：e0
长度：5 mm湿度敏感等级：3
功能数量：1端子数量：32
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：UNSPECIFIED封装代码：HVQCCN
封装等效代码：LCC32,.2SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：240
电源：3.3 V认证状态：Not Qualified
座面最大高度：1 mm子类别：Display Drivers
最大供电电压：3.6 V最小供电电压：3 V
标称供电电压：3.3 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn85Pb15)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：30
宽度：5 mmBase Number Matches：1

ADN2847ACP-32 数据手册

 浏览型号ADN2847ACP-32的Datasheet PDF文件第3页浏览型号ADN2847ACP-32的Datasheet PDF文件第4页浏览型号ADN2847ACP-32的Datasheet PDF文件第5页浏览型号ADN2847ACP-32的Datasheet PDF文件第7页浏览型号ADN2847ACP-32的Datasheet PDF文件第8页浏览型号ADN2847ACP-32的Datasheet PDF文件第9页 
ADN2847  
PIN FUNCTION DESCRIPTIONS (continued)  
Pin Number  
48-Lead  
32-Lead  
Mnemonic  
Function  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
GND2  
IDTONE  
GND2  
Supply Ground  
IDTONE (Requires External Current Sink to Ground)  
Supply Ground  
Supply Ground  
GND2  
25  
26  
26  
27  
28  
28  
29  
30  
31  
31  
32  
VCC  
2
Supply Voltage  
IMODN  
IMODN  
GND2  
IMODP  
IMODP  
GND2  
GND2  
IBIAS  
Modulation Current Negative Output. Connect via a matching resistor to VCC.  
Modulation Current Negative Output. Connect via a matching resistor to VCC  
Supply Ground  
Modulation Current Positive Output. Connect to laser diode.  
Modulation Current Positive Output. Connect to laser diode.  
Supply Ground  
Supply Ground  
Laser Diode Bias Current  
Laser Diode Bias Current  
Extra Laser Diode Bias when AC-Coupled Current Sink  
.
IBIAS  
CCBIAS  
40  
GENERAL  
Laser diodes have current-in to light-out transfer functions as  
shown in Figure 6. Two key characteristics of this transfer function  
are the threshold current, ITH, and slope in the linear region  
beyond the threshold current, referred to as slope efficiency, LI.  
30  
20  
10  
0
P1  
P0  
ER =  
P1 + P0  
2
P
=
AV  
P1  
ꢃP  
P
AV  
ꢃP  
ꢃI  
LI =  
ꢃI  
P0  
76 78 80 82 84 86 88 90 92 94 96 98 100  
RISETIME – ps  
I
CURRENT  
TH  
Figure 4. Rise Time Distribution Under Worst-  
Case Operating Conditions  
Figure 6. Laser Transfer Function  
Control  
40  
30  
20  
10  
A monitor photodiode, MPD, is required to control the LD.  
The MPD current is fed into the ADN2847 to control the power  
and extinction ratio, continuously adjusting the bias current and  
modulation current in response to the laser’s changing threshold  
current and light-to-current slope efficiency.  
The ADN2847 uses automatic power control, APC, to maintain  
a constant average power over time and temperature.  
The ADN2847 uses closed-loop extinction ratio control to allow  
optimum setting of extinction ratio for every device. Thus  
SONET/SDH interface standards can be met over device  
variation, temperature, and laser aging. Closed-loop modulation  
control eliminates the need to either overmodulate the LD or  
include external components for temperature compensation.  
This reduces research and development time and second  
sourcing issues caused by characterizing LDs.  
0
80 82 84 86 88 90 92 94 96 98 100 102 104  
FALLTIME – ps  
Figure 5. Fall Time Distribution Under Worst-  
Case Operating Conditions  
Average power and extinction ratio are set using the PSET and  
ERSET pins, respectively. Potentiometers are connected between  
these pins and ground. The potentiometer RPSET is used to  
change the average power. The potentiometer RERSET is used to  
adjust the extinction ratio. Both PSET and ERSET are kept  
1.2 V above GND.  
–6–  
REV. 0  
1...3456789...12

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