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。
The combined input referred noise voltage of the entire channel is 3.5nV/√Hz at maximum gain. The channel is optimized for dynamic performance and low power in applications where a small package size is critical such as the automotive radar in adaptive cruise control, collision avoidance, blind spot detection, self parking, and electronic bumpers.
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
- 68.5dB Signal-to-noise ratio (SNR)
- 68dB at gain =16dB Spurious-free dynamic range (SFDR)
- Low power of 185mW per channel at 12bits and 72MSPS
- Low noise of 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
发布日期: 2014-11-18
| 更新日期: 2022-03-11