TI TIDA－020004汽车RFCMOS 77GHz雷达模块参考设计|综合论坛 - 逆天PCB论坛

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TI公司的TIDA-020004是汽车RFCMOS 77GHz雷达模块参考设计,为用户提供了测试76GHz到81GHz雷达传感器模块的解决方案.板上电源能汽车输入电池转换成雷达模拟前端(AFE),处理器,带灵活数据速率的控制器局域网(CAN-FD)收发器所需的电源.经过处理后,目标数据在包括CAN-FD物理层(PHY)上发送.参考设计集成了DSP和MCU,VIN电压宽达36V OFF电池电压,容差高达42V,诊断和监测功能可用于ASIL B应用.PCB尺寸仅为50 mm×71 mm,电源也是优化的,具有小尺寸和高效率.主要用在ADAS雷达系统,盲区检测(BSD),车道改变辅助(LCA),前/后两侧来车警告系统(F/RCTA),自动紧急制动(AEB),和自适应巡航控制系统(ACC).本文介绍了参考设计TIDA-020004主要特性,雷达模块框图,电路图,材料清单和PCB设计图.

This automotive radar reference design providescustomers with a tested 76-GHz to 81-GHz radarsensor module solution. The onboard power suppliesconvert the automotive battery input to the requiredrails for the radar analog front end (AFE), processors,and controller area networking with flexible data rate(CAN-FD) transceivers. After processing, the objectdata transmits over the included CAN-FD physicallayer (PHY).

Radar sensors are a requirement for many automotive safety systems. Locating these sensors in bumpersand side mirrors can be difficult. A very small sensor simplifies the process of meeting these marketdemands and provides a less expensive approach to meet such requirements. This reference designaddresses these concerns by combining a single-chip, 76- to 81-GHz automotive radar sensor with twoCAN-FD PHYs and providing the necessary power supply. All of this functionality is contained on a 50×71-mm circuit board. The only two connections that the system requires are the battery power in and CAN-FDout.

The battery power connects to the 12-V input terminal, J1. The wide VIN buck, LM536253-Q1, is utilized toconvert this 12-V input to a 3.3-V output. The LP87702-Q1 then takes the 3.3-V input and creates 5.0-V,1.8-V, and 1.24-V rails. To ensure a low-noise supply, the TPS7A52-Q1 low-dropout linear regulator(LDO) creates a clean 1-V rail for the radio frequency (RF) section of the radar.

The radar section of this design utilizes a printed-circuit-board (PCB) etched antenna with two transmitelements and four receive elements. By using this antenna, a modulated chirp is transmitted andreflections are sampled into the onboard digital signal processor (DSP). With this information, the sensorcan record distance, angle, and velocity measurements from objects within the antenna field of view.

The design offers a feature to write out the object data to a central electronic control unit (ECU) on theCAN-FD bus at a rate of 5 Mb/s. If needed, there is a second CAN-FD PHY that is connected to a SPIport on the AWR1642 RFCMOS Radar.

参考设计TIDA-020004主要特性:

• Space-Optimized Design Fits on Single PCB(Approximately 50 mm × 71 mm)
• Power Supply Optimized for Small Size and HighEfficiency
• Single-Chip 76- to 81-GHz Automotive RadarSensor Integrates DSP and MCU and ProvidesObject Data Over CAN-FD
• Wide VIN 36-V OFF Battery Supply Toleratesup to 42 V
• Diagnostic and Monitoring Functions for ASIL BApplications

参考设计TIDA-020004应用:

• ADAS Radar Systems
• Blind Spot Detection (BSD)
• Lane Change Assist (LCA)
• Front/Rear Cross-Traffic Alert (F/RCTA)
• Autonomous Emergency Braking (AEB)
• Adaptive Cruise Control (ACC)