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DS3920_1112 PDF预览

DS3920_1112

更新时间: 2024-11-22 09:56:39
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美信 - MAXIM /
页数 文件大小 规格书
7页 1386K
描述
Fast Current Mirror

DS3920_1112 数据手册

 浏览型号DS3920_1112的Datasheet PDF文件第2页浏览型号DS3920_1112的Datasheet PDF文件第3页浏览型号DS3920_1112的Datasheet PDF文件第4页浏览型号DS3920_1112的Datasheet PDF文件第5页浏览型号DS3920_1112的Datasheet PDF文件第6页浏览型号DS3920_1112的Datasheet PDF文件第7页 
                         
����������������������������������������������������������������� ꢀMaxim Integrated Productsꢀ ꢀ 1  
19-5797; Rev 2; 12/11  
General Description  
Features  
The DS3920 precision current mirror is designed for ava-  
lanche photodiode (APD) and PIN photodiode biasing  
and monitoring applications. The device offers a current  
clamp to limit current through the APD and a current mir-  
ror output that produces a signal proportional (5:1) to the  
APD current. A diode is also provided to limit the voltage  
at the current mirror output.  
SꢀWideꢀVoltageꢀInputꢀRange:ꢀ2.97Vꢀtoꢀ76V  
SꢀCurrentꢀMonitor  
Wideꢀ250nAꢀtoꢀ2mAꢀRange  
5:1ꢀMirrorꢀRatio  
Fastꢀ50nsꢀTimeꢀConstant  
SꢀCurrentꢀClampꢀ(4.4mAꢀorꢀ20mA,ꢀtyp)  
SꢀVoltageꢀClampꢀProtectsꢀSubsequentꢀOutputꢀCircuitry  
Sꢀ6-PinꢀSOT23ꢀ(MAX4007ꢀCompatible)  
The device accepts a +2.97V to +76V current mirror  
supply voltage. Internal current limiting (4.4mA or 20mA,  
typ) protects the monitored device from a short circuit to  
ground. The provided internal clamp diode protects the  
current mirror output from overvoltage. Additionally, the  
device features thermal shutdown if the die temperature  
reaches +150NC.  
Applications  
Avalanche Photodiode (APD) Biasing  
PIN Photodiode Monitoring  
GEPON, GPON, 10GEPON, XGPON: ONU and OLT  
The device is available in a 6-pin SOT23 package, and  
operates over the -40NC to +85NC extended temperature  
range.  
Ordering Information appears at end of data sheet.  
Typical Application Circuit  
APD BIAS  
R
FILTER  
100–1000Ω  
3.3V  
MIRIN  
DIODE  
C
FILTER  
0.1μF  
CURRENT  
MONITOR  
I
I
/5  
MIROUT  
MIROUT  
THERMAL  
SHUTDOWN  
I
/5  
GND  
MIR MIROUT  
V
OUT  
CURRENT  
LIMIT  
R
OUT  
1k–5kΩ  
DS3920  
MIROUT  
R
AGC  
499Ω  
ROSA  
APD  
TIA  
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/DS3920.related  
Forꢀpricing,ꢀdelivery,ꢀandꢀorderingꢀinformation,ꢀpleaseꢀcontactꢀMaximꢀDirectꢀatꢀ1-888-629-4642,ꢀ  
orꢀvisitꢀMaxim’sꢀwebsiteꢀatꢀwww.maxim-ic.com.  

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