基于MAX3946的10Gbps低功耗激光二极管驱动方案
基于max3946的10gbps低功耗激光二极管驱动方案
maxim 公司的max3946是+3.3v多速率低功耗激光二极管驱动器，数据速率高11.3gbps，支持sff-8431 sfp+ msa 和and sff-8472，3.3v时的功耗为225mw，可编程调制电流从10ma到100ma，可编程偏压电流从5ma到80ma，以及可编程输入均衡和输出去加重。
max3946应用在4x/8x fc sfp+ 光收发器，10gfc sfp+光收发器，10gbase-lr sfp+光收发器，10gbase-lrm sfp+光收发器和oc192-sr xfp/sfp+收发器。本文介绍max3946主要特性和方框图，ac测试电路图，眼安全电路图以及10gbase-lrm应用电路图和10gbase-lr应用电路图。
the max3946 is a +3.3v, multirate, low-power laser diode driver designed for ethernet and fibre channel transmission systems at data rates up to 11.3gbps. this device is optimized to drive a differential transmitter optical subassembly (tosa) with a 25i flex circuit. the unique design of the output stage enables use of unmatched tosas, greatly reducing headroom limitations and lowering power consumption.
the device receives differential cml-compatible signals with on-chip line termination. it can deliver laser modulation current of up to 80ma, at an edge speed of 20ps (20% to 80%), into a 5i to 25i external differential load. the device is designed to have a symmetrical output stage with on-chip back terminations integrated into its outputs. a high-bandwidth, fully differential signal path is implemented to minimize deterministic jitter. an equalization block can be activated to compensate for the sfp+ connector. the integrated bias circuit provides programmable laser bias current up to 80ma. both the laser bias generator and the laser modulator can be disabled from a single pin, disable.
a 3-wire digital interface reduces the pin count and permits adjustment of input equalization, pulse-width adjustment, tx polarity, tx deemphasis, modulation current, and bias current without the need for external components. the max3946 is available in a 4mm x 4mm, 24-pin tqfn package.
max3946主要特性：
225mw power dissipation enables < 1w sfp+ modules
up to 100mw power consumption reduction by enabling the use of unmatched fp/dfb tosas
supports sff-8431 sfp+ msa and sff-8472 digital diagnostic
225mw power dissipation at 3.3v (imod = 40ma, ibias = 60ma assuming 25i tosa)
single +3.3v power supply
up to 11.3gbps (nrz) operation
programmable modulation current from 10ma to 100ma (5i load)
programmable bias current from 5ma to 80ma
programmable input equalization
programmable output deemphasis
25i output back termination at tout+ and tout-
dj performance 7psp-p with mismatched differential load (5i)
dj performance 5psp-p with mismatched differential load (25i)
dj performance 5psp-p with 50i differential load
programmable pulse width
edge transition times of 20ps
bias current monitor
integrated eye safety features
3-wire digital interface
-40℃ to +95℃ operation
max3946应用：
4x/8x fc sfp+ optical transceivers
10gfc sfp+ optical transceivers
10gbase-lr sfp+ optical transceivers
10gbase-lrm sfp+ optical transceivers
oc192-sr xfp/sfp+ transceivers
图1。max3946功能方框图
图2。max3946 ac测试电路图
图3。max3946眼安全电路图
图4。max3946 10gbase-lrm应用电路图
图5。max3946 10gbase-lr应用电路图
将树莓派设置为媒体服务器的7种方法
微软跨Windows、WinPhone和Xbox平台游戏展示
肖特基二极管选型参数解读
生产环境对电源模块可靠性的影响
惠州将打造物联网产业世界级发展平台
基于MAX3946的10Gbps低功耗激光二极管驱动方案
介绍一种关于STM32 ADC 多通道16路电压采集技术
医疗新基建发力呼吸机如何“乘风破浪”
第六届中国工业大奖发布会在京举行
通道数字下变频器ISL5216的功能特点及应用研究
群创光电发布11月营收报告，营收金额约合人民币50亿元
市值最高的加密货币比特币正在消亡
微波频率合成器的多倍频程覆盖范围和相位噪声性能
氧化铝铜电池点焊针的性能及特点
热继电器和熔断器的原理说明
除了发展云计算,云计算的开支也值得关注
支持信号传1公里，穿透4堵实体墙， Wi-Fi Halow技术怎么用？
电动工具栅极驱动器的级联需求
区块链上的江湖人生“神奇江湖”微信已推出小程序
山东隆基再次订购雅士林高低温交变湿热试验箱
maxim 公司的max3946是+3.3v多速率低功耗激光二极管驱动器，数据速率高11.3gbps，支持sff-8431 sfp+ msa 和and sff-8472，3.3v时的功耗为225mw，可编程调制电流从10ma到100ma，可编程偏压电流从5ma到80ma，以及可编程输入均衡和输出去加重。
max3946应用在4x/8x fc sfp+ 光收发器，10gfc sfp+光收发器，10gbase-lr sfp+光收发器，10gbase-lrm sfp+光收发器和oc192-sr xfp/sfp+收发器。本文介绍max3946主要特性和方框图，ac测试电路图，眼安全电路图以及10gbase-lrm应用电路图和10gbase-lr应用电路图。
the max3946 is a +3.3v, multirate, low-power laser diode driver designed for ethernet and fibre channel transmission systems at data rates up to 11.3gbps. this device is optimized to drive a differential transmitter optical subassembly (tosa) with a 25i flex circuit. the unique design of the output stage enables use of unmatched tosas, greatly reducing headroom limitations and lowering power consumption.
the device receives differential cml-compatible signals with on-chip line termination. it can deliver laser modulation current of up to 80ma, at an edge speed of 20ps (20% to 80%), into a 5i to 25i external differential load. the device is designed to have a symmetrical output stage with on-chip back terminations integrated into its outputs. a high-bandwidth, fully differential signal path is implemented to minimize deterministic jitter. an equalization block can be activated to compensate for the sfp+ connector. the integrated bias circuit provides programmable laser bias current up to 80ma. both the laser bias generator and the laser modulator can be disabled from a single pin, disable.
a 3-wire digital interface reduces the pin count and permits adjustment of input equalization, pulse-width adjustment, tx polarity, tx deemphasis, modulation current, and bias current without the need for external components. the max3946 is available in a 4mm x 4mm, 24-pin tqfn package.
max3946主要特性：
225mw power dissipation enables < 1w sfp+ modules
up to 100mw power consumption reduction by enabling the use of unmatched fp/dfb tosas
supports sff-8431 sfp+ msa and sff-8472 digital diagnostic
225mw power dissipation at 3.3v (imod = 40ma, ibias = 60ma assuming 25i tosa)
single +3.3v power supply
up to 11.3gbps (nrz) operation
programmable modulation current from 10ma to 100ma (5i load)
programmable bias current from 5ma to 80ma
programmable input equalization
programmable output deemphasis
25i output back termination at tout+ and tout-
dj performance 7psp-p with mismatched differential load (5i)
dj performance 5psp-p with mismatched differential load (25i)
dj performance 5psp-p with 50i differential load
programmable pulse width
edge transition times of 20ps
bias current monitor
integrated eye safety features
3-wire digital interface
-40℃ to +95℃ operation
max3946应用：
4x/8x fc sfp+ optical transceivers
10gfc sfp+ optical transceivers
10gbase-lr sfp+ optical transceivers
10gbase-lrm sfp+ optical transceivers
oc192-sr xfp/sfp+ transceivers
图1。max3946功能方框图
图2。max3946 ac测试电路图
图3。max3946眼安全电路图
图4。max3946 10gbase-lrm应用电路图
图5。max3946 10gbase-lr应用电路图
将树莓派设置为媒体服务器的7种方法
微软跨Windows、WinPhone和Xbox平台游戏展示
肖特基二极管选型参数解读
生产环境对电源模块可靠性的影响
惠州将打造物联网产业世界级发展平台
基于MAX3946的10Gbps低功耗激光二极管驱动方案
介绍一种关于STM32 ADC 多通道16路电压采集技术
医疗新基建发力呼吸机如何“乘风破浪”
第六届中国工业大奖发布会在京举行
通道数字下变频器ISL5216的功能特点及应用研究
群创光电发布11月营收报告，营收金额约合人民币50亿元
市值最高的加密货币比特币正在消亡
微波频率合成器的多倍频程覆盖范围和相位噪声性能
氧化铝铜电池点焊针的性能及特点
热继电器和熔断器的原理说明
除了发展云计算,云计算的开支也值得关注
支持信号传1公里，穿透4堵实体墙， Wi-Fi Halow技术怎么用？
电动工具栅极驱动器的级联需求
区块链上的江湖人生“神奇江湖”微信已推出小程序
山东隆基再次订购雅士林高低温交变湿热试验箱