IWR1843 Single-chip 76-GHz to 81-GHz industrial radar sensor integrating DSP, MCU and radar accelerator | TI.com

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Single-chip 76-GHz to 81-GHz industrial radar sensor integrating DSP, MCU and radar accelerator



The IWR1843 device is an integrated single-chip mmWave sensor based on FMCW radar technology capable of operating in the 76- to 81-GHz band with up to 4-GHz continuous chirp. The device is built with the low-power 45-nm RFCMOS process from Texas Instruments. This solution enables unprecedented levels of integration in an extremely small form factor. The IWR1843 is 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 device is a self-contained, single-chip solution that simplifies the implementation of mmWave sensors in the band of 76 to 81 GHz. The IWR1843 includes a monolithic implementation of a 3TX, 4RX system with built-in PLL, and A2D converters. The IWR1843 also integrates a DSP subsystem, which contains a TI high-performance C674x DSP for the radar signal processing. The device includes an ARM R4F-based processor subsystem, which is responsible for front-end configuration, control, and calibration. Simple programming model changes can enable 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. Additionally, the device 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 A2D
    • 76- to 81-GHz coverage with 4 GHz available bandwidth
    • Four receive channels
    • Three transmit channels
    • Ultra-accurate chirp engine based on fractional-N PLL
    • TX power: 12 dBm
  • 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
  • Other interfaces available to user application
    • Up to 6 ADC channels
    • Up to 2 SPI channels
    • Up to 2 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 beam forming
  • 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 MHz
    • Supports externally driven clock (square/sine) at 40 MHz
    • Supports 40 MHz crystal connection with load capacitors
  • Easy hardware design
    • 0.65-mm pitch, 161-pin 10.4 mm × 10.4 mm flip chip BGA package for easy assembly and low-cost PCB design
    • Small solution size

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Part number Order Frequency Number of Rx Number of Tx ADC sampling rate (MSPS) TX power (dBm) Arm CPU Co-processor(s) DSP Package size: mm2:W x L (PKG) Interface RAM (KB) Operating temperature range (C)
IWR1843 Order now 76 - 81 GHz     4     3     12.5     12     ARM R4F @ 200MHz     Radar Hardware Accelerator     C674x DSP 600MHz     161FC/CSP: 108 mm2: 10.4 x 10.4 (FC/CSP | 161)     CAN
2048     -40 to 105    
IWR1443 Samples not available 76 – 81 GHz     4     3     37.5     12     ARM R4F @ 200MHz     Radar Hardware Accelerator         161FC/CSP: 108 mm2: 10.4 x 10.4 (FC/CSP | 161)     CAN
576     -40 to 105    
IWR1642 Samples not available 76 – 81 GHz     4     2     12.5     12     ARM R4F @ 200MHz         1 C67x @ 600MHz     161FC/CSP: 108 mm2: 10.4 x 10.4 (FC/CSP | 161)     CAN
1536     -40 to 105