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[原创] Maxim MAX40661汽车激光雷达(LiDAR)跨阻放大器解决方案

关键词:汽车电子 激光雷达 汽车驾驭系统

时间:2020-04-08 10:13:01       来源:中电网

摘要: Maxim公司的MAX40661和MAX40660是用于汽车激光雷达(LiDAR)应用的光学测距测量接收器跨阻放大器(TIA),具有低噪音高增益低群时延和过载状态下快速恢复时间.它的重要特性包括输入参考噪声密度(MAX40660)2.38pA,内部输入钳位,引脚选择25kΩ和 50kΩ跨阻,宽带宽490MHz(MAX40660),输入电容0.5pF和跨阻25kΩ; MAX40661的带宽为160MHz,输入电容10pF. MAX40661和MAX40660满足AEC-Q100规范,和ASIL兼容,采用3mm x 3mm,10引脚TDFN封装,工作温度-40°C 到 +125°C.主要用在光学测距,LiDAR接收器,工业安全系统,汽车驾驭系统.本文介绍了MAX40661主要特性和优势, 简化框图和典型应用电路,以及评估板MAX40661 EVK主要特性,电路图,材料清单和PCB设计图.



The MAX40660 and MAX40661 are transimpedance am-plifiers for optical distance measurement receivers in Li-DAR applications. Low noise, high gain, low group delay, and fast recovery from overload make these TIAs ideal for distance-measurement applications. Important features include 2.38pA input-referred noise density (MAX40660), an internal input clamp, pin-selectable 25kΩ and 50kΩ transimpedance, and wide bandwidth (490MHz (typ) for the MAX40660 with 0.5pF input capacitance and 25kΩ transimpedance; 160MHz (typ) for the MAX40661 with 10pF input capacitance). An offset current input allows optional adjustment of input offset current. A low-power/standby control input reduces the supply current by better than 80% to help reduce average power..

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