[原创]ADI LTC6563低噪声四通道跨阻放大器(TIA)解决方案

ADI公司的LTC6563是低噪声四通道跨阻放大器(TIA), 具有600MHz带宽和低噪声,宽线性范围和低功耗特性, 非常适合采用雪崩光电二极管(APD)和光电二极管(PD)的LIDAR接收器.放大器具有可选的22.2/16.7/11.1/5.55kΩ跨阻增益(RT) 和90μ线性输入电流范围.器件采用具有0.5pF总输入电容的APD,输入电流噪声密度为1.8pA/√Hz(100MHz时)和3.7pA/√Hz(600MHz时).根据输出模式,LTC6563采用3.3V电源供电,其功耗在194mW和325mW之间.内部4:1 MUX简化了系统设计.此外,外部多路复用能力支持多达64通道的通道扩展,从而节省空间和功耗.LTC6563具有快速过载恢复和快速通道切换功能,使其非常适合集成多个APD的LIDAR接收器.内置高速差分ADC驱动器在驱动100Ω外部差分负载时摆幅高达2VP-P.LTC6563采用3mm × 5mm 24引脚裸露焊盘QFN封装,带可润湿侧翼.主要用在汽车机载激光扫描(LIDAR)接收器和工业LIDAR接收器.本文介绍了LTC6563主要特性,框图,多种典型应用电路, 电特性测试电路图,以及演示板EVAL-LTC6563-TQFN主要特性,电路图和材料清单.

The LTC®6563 is a low-noise four-channel transimpedance amplifier (TIA) with 600MHz bandwidth. The LTC6563 TIAs low noise, wide linear range, and low power dissipation

are ideal for LIDAR receivers using Avalanche photodiodes (APDs) and photodiodes (PDs). The amplifier features selectable 22.2/16.7/11.1/5.55kΩ Transimpedance gain (RT) and 90μA linear input current range. Using an APD with a total input capacitance of 0.5pF, the input current noise density is 1.8pA/√Hz at 100MHz and 3.7pA/√Hz at 600MHz. The LTC6563 consumes between 194mW and 325mW on a 3.3V supply depending on output mode.

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