原标题：TI IWR1443 77GHz发送器参考设计TIDEP-0091

　　TI公司的IWR1443是是基于FMCW雷达技术的单片mmWave传感器,工作在76-81GHz频段,高达4GHz连续Chirp信号,包括有内置了PLL和A2D转换器的确3TX,4RX系统,完全可配置支持复杂FFT和CFAR检测的硬件加速器,以及两个基于ARM R4F处理器子系统:一个用来主控制和附加算法,另一个用来前端配置,控制和校准.发送功率+12dBm,主要用在测量范围,速度和角度的工业传感器,位移传感,液位探测雷达,场发射器,交通监测,接近检测,安全监控和工厂自动化安全卫士.本文介绍了IWR1443主要特性,功能框图,77GHz发送器参考设计TIDEP-0091主要特性,硬件框图和软件框图,以及参考设计TIDEP-0091框图,电路图,材料清单和IWR1443 EVMPCB设计图.

　　Single-Chip 76-to-81GHz mmWave Sensor Integrating MCU and Hardware Accelerator　The IWR1443 device is an integrated single-chip mmWave sensor based on FMCW radar technologycapable of operation in the 76- to 81-GHz band with up to 4 GHz continuous chirp. The device is built withTI’s low-power 45-nm RFCMOS process, and this solution enables unprecedented levels of integration inan extremely small form factor. The IWR1443 is an ideal solution for low-power, self-monitored, ultraaccurateradar systems in the industrial applications such as building automation, factory automation,drones, material handling, traffic monitoring, and surveillance.

　　The IWR1443 device is a self-contained, single-chip solution that simplifies the implementation ofmmWave sensors in the band of 76 to 81 GHz. The IWR1443 includes a monolithic implementation of a3TX, 4RX system with built-in PLL and A2D converters. The device includes fully configurable hardwareaccelerator that supports complex FFT and CFAR detection. Additionally, the device includes two ARMR4F-based processor subsystems: one processor subsystem is for master control, and additionalalgorithms; a second processor subsystem is responsible for front-end configuration, control, andcalibration. Simple programming model changes can enable a wide variety of sensor implementation with

　　the possibility of dynamic reconfiguration for implementing a multimode sensor. Additionally, the device isprovided as a complete platform solution including reference hardware design, software drivers, sampleconfigurations, API guide, training, and user documentation.

　　IWR1443主要特性:

　　• FMCW Transceiver

　　– Integrated PLL, Transmitter, Receiver,Baseband, and A2D

　　– 76- to 81-GHz Coverage With 4-GHzContinuous Bandwidth

　　– Four Receive Channels

　　– Three Transmit Channels (Two Can be UsedSimultaneously)

　　– Ultra-Accurate Chirp Engine Based onFractional-N PLL

　　– TX Power: 12 dBm

　　– RX Noise Figure:

　　– 15 dB (76 to 77 GHz)

　　– 16 dB (77 to 81 GHz)

　　– Phase Noise at 1 MHz:

　　– –94 dBc/Hz (76 to 77 GHz)

　　– –91 dBc/Hz (77 to 81 GHz)

　　• Built-in Calibration and Self-Test

　　– ARM® Cortex®-R4F-Based Radio ControlSystem

　　– Built-in Firmware (ROM)

　　– Self-calibrating System Across Frequency andTemperature

　　• On-Chip Programmable Core for Embedded UserApplication

　　– Integrated Cortex®-R4F Microcontroller Clockedat 200 MHz

　　– On-Chip Bootloader Supports AutonomousMode (Loading User Application From QSPI Flash Memory)

　　– Integrated Peripherals

　　– Internal Memories With ECC

　　– Radar Hardware Accelerator (FFT, LogmagnitudeComputations, and others)

　　– Integrated Timers (Watch Dog and up to Four32-Bit or Two 64-Bit Timers)

　　– I2C (Master and Slave Modes Supported)

　　– Two SPI Ports

　　– CAN Port

　　– Up to Six General-Purpose ADC Ports

　　• High-Speed Data Interface to Support DistributedApplications (Namely, Intermediate Data)

　　• Host Interface

　　– Control Interface With External Processor OverSPI

　　– Data Interface With External Processor OverMIPI D-PHY and CSI2 V1.1

　　– Interrupts for Fault Reporting

　　• IWR1443 Advanced Features

　　– Embedded Self-monitoring With No HostProcessor Involvement

　　– Complex Baseband Architecture

　　– Embedded Interference Detection Capability

　　• Power Management

　　– Built-in LDO Network for Enhanced PSRR

　　– I/Os Support Dual Voltage 3.3 V/1.8 V

　　• Clock Source

　　– Supports External Oscillator at 40 and 50 MHz

　　– Supports Externally Driven Clock (Square/Sine)at 40 and 50 MHz

　　• Easy Hardware Design

　　– 0.65-mm Pitch, 161-Pin 10.4 mm × 10.4 mmFlip Chip BGA Package for Easy Assembly andLow-Cost PCB Design

　　– Small Solution Size

　　• Operating Conditions

　　– Junction Temp Range: –40℃ to 105℃

　　IWR1443应用:

　　• Industrial Sensor for Measuring Range, Velocity, and Angle

　　• Tank Level Probing Radar

　　• Displacement Sensing

　　• Field Transmitters

　　• Traffic Monitoring

　　• Proximity Sensing

　　• Security and Surveillance

　　• Factory Automation Safety Guards

　　图1.IWR1443功能框图

　　IWR144377GHz发送器参考设计TIDEP-0091

　　TI Design TIDEP-0091 highlights strategies for power optimization of IWR14xx 76- to 81-GHz mmWave sensors in tank level-probing applications, displacement sensors, 4- to 20-mA sensors, and other low-power applications for detecting range with high accuracy in a minimal power envelope. In these applications, the system often operates on a low-voltage data line that provides less power than the operational power consumption. Duty cycling is critical to reducing the average power to meet the power input restrictions. Power optimization is achieved through MSP432 external duty cycling the IWR14xx device for periodic sensing. Additionally, this TI Design provides a sample configuration for single-dimensional range detection.

　　In the TIDEP-0091 the MSP432 LaunchPad™ is the master controller and is physically connected to theIWR1443 EVM through the standard LaunchPad, 20-pin headers. All communication between the boardsis accomplished using these headers. A standard, 3-pin serial peripheral interface (SPI) is used ascommunications protocol, and general purpose IOs (GPIOs) are used for control and measurementflagging. User communication is provided through a micro-USB cable, which carries standard UART serialdata to a host (PC) terminal window.

　　The MSP432 is directed through UART commands to power up the IWR1443 as necessary, to obtainrange measurements through SPI from the IWR1443, and to power down the system when not in use.

　　These steps are taken to reduce the average power required to take periodic measurements—animportant goal for industrial applications. The MSP432 will remain in a low-power mode whenever notprocessing a measurement or UART command.

　　77GHz发送器参考设计TIDEP-0091主要特性:

　　Uses IWR1443 mmWave and SimpleLink MSP432 software development kits (SDKs)

　　Serial communication between IWR1443 and MSP432

　　Provides an optimized processing chain for single-dimension range detection

　　Applicable to any application requiring low-power duty cycling

　　图2.77GHz发送器参考设计TIDEP-0091外形图

　　参考设计TIDEP-0091材料清单:

　　详情请见:

tidrqs3a.pdf.pdf

iwr1443.pdf.pdf

tidrqs4a.pdf.pdf

tidud26a.pdf.pdf

swru518b.pdf.pdf