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QDFB-010-052 PDF预览

QDFB-010-052

更新时间： 2024-11-10 23:30:35
品牌 Logo 应用领域
其他 - ETC 光纤
页数 文件大小 规格书
2页 591K
描述
FIBER OPTIC RECEIVER

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QDFB-010-052 数据手册

 浏览型号QDFB-010-052的Datasheet PDF文件第2页 
QDFB  
Wide Dynamic Range  
pinFET Receiver  
I
I
I
I
I
Telecom access and junction applications  
Transimpedance amplifier with AGC  
High sensitivity  
Wide dynamic range 32 dB  
1300 and 1550 nm operation  
>
Description  
The QDFB is a fiber-optic transimpedance receiver used in long-wavelength applications.  
Excellent sensitivity and a wide dynamic range are achieved by the use of an automatic  
gaincontrolcircuit(AGC). TheQDFBfeaturesabufferedoutputstagewhichincreasesthe  
drive capabilities. Packaged in the industry-standard, low-profile 14-pin DIL package, the  
hermetic package is pigtailed with multimode fiber. Connector selection is optional.  
Applications  
TheQDFBpinFETisdesignedtooperateindigitalfiber-opticsystemsrunningatdatarates  
up to 155 Mb/s. The pinFET reduces system engineering time by eliminating performance  
matching between the detector, amplifier, and an automatic gain control loop while  
maintaining stability.  
Power Supply Internal 0.01 µf power supply decoupling capacitors are used to improve  
performance in noisy conditions. Additionally, external bypass capacitors with short leads  
should be used at the supply pins. Capacitor values depend on system conditions. The  
QDFB requires a single +5 and two -5 volt supplies, one for the detector and the other for  
the amplifier. Pin 1 is dedicated to the detector and allows the photodiode current to be  
monitored.  
Output Loading Considerations An output buffer enables the QDFB to drive  
capacitive loads. Nevertheless, output loading should still be kept to a minimum; excessive  
reactive loads can cause ringing and overshoot. Also, the output is generally AC-coupled  
to the next stage to isolate post-amplification circuitry from shifts in pinFET dc output  
voltage.  
Maximum Overload Power The maximum overload is defined as the input power  
needed to cause a 1 volt peak-to-peak output voltage. Operation above this level is possible  
because the QDFB does not start clipping until about 2.5 volts peak-to-peak, or at  
approximately 0 dBm optical input power.  
Sensitivity The sensitivity of every module is determined before shipment. The  
sensitivity calculated is the input power needed to maintain better than 10-9 Bit Error Rate.  
The calculation is based on an RMS noise measurement under “no light” conditions.  
ManufacturingInformation TheQDFBissubjectedtoabatteryofprocessesincluding  
active burn-in, temperature cycling, fine and gross leak test, and visual inspections.  
All devices are tested before shipment; test results are included with each unit.  
36  
Corning Lasertron 2000 Product Guide  
2000  
12

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