Document
IWR1843
SWRS228A – SEPTEMBER 2019 – REVISED JANUARY 2022
IWR1843 Single-Chip 76- to 81-GHz FMCW mmWave Sensor
1 Features
• FMCW transceiver
– Integrated PLL, transmitter, receiver, Baseband, and ADC
– 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 process 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
• 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 upto SIL 2 by TUV SUD • Device 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 • Operating conditions
– Junction temp range: –40°C to 105°C
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
IWR1843
SWRS228A – SEPTEMBER 2019 – REVISED JANUARY 2022
2 Applications
• Smart/Automatic door openers Industrial sensor for measuring range, velocity, and angle
• Tank level probing radar • Displacement sensing • Field transmitters
40-MHz Crystal
• Traffic monitoring • Proximity sensing • Security and surveillance • Factory automation safety guards • People counting • Motion detection
QSPI Flash
Power Management
POWER
www.ti.com
Antenna Structure
RX1 RX2 RX3 RX4
TX1 TX2 TX3
mmWave/ Radar
Front End
Integrated MCU ARM Cortex-R4F
Integrated DSP TI C674x
SPI UART Tx/Rx
CAN
IWR1843
Figure 2-1. Autonomous Sensor For Industrial Applications
3 Description
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 ADC 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 R4Fbased 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.
PART NUMBER(2) IWR1843ABGABL IWR1843ABGABLR
Device Information
PACKAGE(1)
BODY SIZE
FCBGA (161)
10.4 mm × 10.4 mm
TRAY / TAPE AND REEL Tray Tape and Reel
(1) For more information, see Section 13, Mechanical, Packaging, and Orderable Information. (2) For more information, see Section 12.1, Device Nomenclature.
2
Submit Docu.