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
5秒后页面跳转
STM32F030C6芯片介绍：主要参数分析、引脚配置说明、功耗及封装
PCF8591数据手册解读：参数、引脚说明
一文带你了解ss8050参数、引脚配置、应用指南
深入解析AD7606高性能多通道模数转换器：资料手册参数分析
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
