Texas Instruments IWR1843/IWR1843A Industrial mmWave Radar Sensor

Texas Instruments IWR1843/IWR1843A Industrial mmWave Radar Sensor is an integrated single-chip millimeter-wave sensor based on FMCW radar technology. The IWR1843 is capable of operating in the 76GHz to 81GHz band with up to 4GHz continuous chirp. The IWR1843/IWR1843A sensors feature the low-power 45nm RFCMOS process enabling unprecedented levels of integration in an extremely small form factor. The IWR1843/IWR1843A Sensors are an ideal solution for low-power, self-monitored, ultra-accurate radar systems in industrial applications, such as building automation, factory automation, drones, material handling, traffic monitoring, and surveillance.

The IWR1843/IWR1843A includes a monolithic implementation of a 3TX, 4RX system with built-in PLL and ADC converters. The IWR1843/IWR1843A also integrates a DSP subsystem containing a TI high-performance C674x DSP for radar signal processing. The device includes an Arm® R4F-based processor subsystem responsible for front-end configuration, control, and calibration. Simple programming model changes facilitate a wide variety of sensor implementation with the possibility of dynamic reconfiguration for implementing a multimode sensor. The Hardware Accelerator block (HWA) can perform radar processing and can help save MIPS on the DSP for higher-level algorithms.

The IWR1843/IWR1843A Industrial Radar Sensor is provided as a complete platform solution including TI reference designs, software drivers, sample configurations, API guides, training, and user documentation.


  • FMCW transceiver
    • Integrated PLL, transmitter, receiver, Baseband, and ADC
    • 76GHz to 81GHz coverage with 4GHz available bandwidth
    • Four receive channels
    • Three transmit channels
    • Ultra-accurate chirp engine based on fractional-N PLL
    • TX power: 12dBm
  • Built-in calibration and self-test (monitoring)
    • Arm® Cortex®-R4F-based radio control system
    • Built-in firmware (ROM)
    • Self-calibrating system across frequency and temperature
  • C674x DSP for FMCW signal processing
  • On-chip memory: 2MB
  • Cortex-R4F microcontroller for object tracking and classification, and interface control
    • Supports autonomous mode (loading user application from QSPI Flash memory)
  • Integrated peripherals
    • Internal memories With ECC
  • Host interface
    • CAN and CAN-FD
  • Power management
    • Built-in LDO network for enhanced PSRR
    • I/Os support dual voltage 3.3V/1.8V
  • Other interfaces available to user application
    • Up to six ADC channels
    • Up to two SPI channels
    • Up to two UARTs
    • I2C
    • GPIOs
    • 2-lane LVDS interface for raw ADC data and debug instrumentation
  • IWR1843 advanced features
    • Embedded self-monitoring with no host processor involvement
    • Complex baseband architecture
    • Embedded interference detection capability
    • Programmable phase rotators in transmit path to enable beamforming
  • Functional Safety-Compliant
    • Developed for functional safety applications
    • Documentation available to aid IEC 61508 functional safety system design up to SIL 3
    • Hardware integrity up to SIL-2
    • Safety-related certification
    • IEC 61508 certified up to SIL 2 by TUV SUD
  • Clock source
    • Supports external oscillator at 40MHz
    • Supports externally driven clock (square/sine) at 40MHz
    • Supports 40MHz crystal connection with load capacitors
  • Easy hardware design
    • 0.65mm pitch, 161-pin 10.4mm × 10.4mm flip-chip BGA package for easy assembly and low-cost PCB design
    • Small solution size


  • Smart/Automatic door openers
  • 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
  • People counting
  • Motion detection

Automotive Diagram

Application Circuit Diagram - Texas Instruments IWR1843/IWR1843A Industrial mmWave Radar Sensor

Functional Block Diagram

Block Diagram - Texas Instruments IWR1843/IWR1843A Industrial mmWave Radar Sensor
Published: 2019-10-02 | Updated: 2022-03-11