Analog Devices Inc. 亚德诺半导体 AD8285 雷达接收路径 AFE

亚德诺半导体 AD8285 雷达接收路径模拟前端(AFE)内置四个通道的低噪声前置放大器(LNA)、可编程增益放大器(PGA)和抗混叠滤波器(AAF),外加一个直接连接 ADC 的通道,所有通道都集成有 12 位模数转换器(ADC)。各通道具有 16dB 至 34dB 的增益范围,增量为 6dB,ADC 转换速率最高可达 72MSPS。 在最大增益下,所有通道折合到输入端的噪声电压为 3.5 nV/√Hz。通道专门针对动态范围与低功耗进行了优化,适用于要求小封装尺寸的应用,如自适应巡航控制、防撞系统、盲点检测、自动停车、电子保险杠。

特性

  • 4 channel LNA, PGA, and AAF
  • 1 direct-to-ADC channel
  • Programmable gain amplifier (PGA)
    • Includes low noise preamplifier (LNA)
    • Serial peripheral interface (SPI) programmable gain 16dB to 34dB in 6dB steps
  • Anti-aliasing filter (AAF)
    • Programmable third-order, low-pass elliptic filter (LPF) from 1.0MHz to 12.0MHz
  • Analog-to-digital converter (ADC)
    • 12 bits of accuracy up to 72MSPS
    • Signal-to-noise ratio (SNR): 68.5dB
    • Spurious-free dynamic range (SFDR): 68dB at gain =16dB
  • Low power: 185mW per channel at 12bits and 72MSPS
  • Low noise: 3.5nV/√Hz maximum of input referred voltage noise

应用

  • Automotive radar
  • Adaptive cruise control
  • Collision avoidance
  • Blind spot detection
  • Self parking
  • Electronic bumpers

Functional Block Diagram

Analog Devices Inc. 亚德诺半导体  AD8285 雷达接收路径 AFE