1 Features

• FMCW transceiver

– Integrated 4 receivers and 3 transmitters

Antennas-On-Package (AOP)

– Integrated PLL, transmitter, receiver, Baseband,

and ADC

– 76- to 81-GHz coverage with 4 GHz available

bandwidth

– Ultra-accurate chirp engine based on fractional-

N PLL

– TX Effective isotropic radiated power (EIRP):

16 dBm

– RX Effective isotropic noise figure: 10 dB (76 to

81 GHz)

– Phase noise at 1 MHz:

• –95 dBc/Hz (76 to 77 GHz)

• –93 dBc/Hz (77 to 81 GHz)

• 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 RAM

• Arm Cortex-R4F microcontroller for object tracking

and classification, and interface control

– Supports autonomous mode (loading user

application from QSPI flash memory)

• Host interface

– CAN (two instances, one being CAN-FD)

• Other interfaces available to user application

– Up to 6 general purpose ADC channels

– Up to 2 SPI ports

– Up to 2 UARTs

– I2C

– GPIOs

– 2-lane LVDS interface for raw ADC data and

debug instrumentation

• Device Security (on select part numbers)

– Secure authenticated and encrypted boot

support

– Customer programmable root keys, symmetric

keys (256 bit), Asymmetric keys (up to RSA-2K)

with Key revocation capability

– Crypto software accelerators - PKA , AES (up

to 256 bit), SHA (up to 256 bit), TRNG/DRGB

• Functional safety targeted for SIL-2

• IWR1843AOP 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

– 0.8-mm pitch, 180-pin 15 mm × 15 mm flip chip

BGA package (ALP) for easy assembly and

low-cost PCB design

– Small solution size

• Operating Conditions

– Junction Temperature range: –40°C to 125°C

2 Applications

• Automated door/gate

• Motion detector

• Industrial sensor for measuring range, velocity, and

angle

• Tank level probing radar

• Displacement sensing

• Traffic monitoring

• Proximity sensing

• Security and surveillance

• Factory automation safety guards

• Level Transmitter

• eBike

• Parking barrier

• Off highway vehicle sensor

• Kick eScooter

• Self balancing personal transporter

3 Description

The IWR1843AOP 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 IWR1843AOP 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 IWR1843AOP device is a self-contained, single-chip solution that simplifies the implementation of mmWave

sensors in the band of 76 to 81 GHz. The IWR1843AOP includes a monolithic implementation of a 3TX, 4RX

system with built-in PLL, and ADC converters. The IWR1843AOP 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.