Texas Instruments IWR1642 76GHz to 81GHz mmWave Sensor

Texas Instruments IWR1642 76GHz to 81GHz mmWave Sensor is an integrated single-chip mmWave sensor based on FMCW radar technology capable of operation in the 76GHz to 81GHz band with up to 4GHz continuous chirp. The device is built with TI's low-power 45nm RFCMOS process, and this solution enables unprecedented levels of integration in an extremely small form factor. The IWR1642 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 IWR1642 includes a monolithic implementation of a 2TX, 4RX system with built-in PLL and A2D converters. This sensor also integrates a DSP subsystem containing TI's high-performance C674x DSP for RF signal processing. The device includes an ARM R4F-based processor subsystem responsible for front-end configuration, control, and calibration. Simple programming model changes can enable various sensor implementations with the possibility of dynamic reconfiguration for implementing a multimode sensor.

Features

FMCW transceiver
- Integrated PLL, transmitter, receiver, baseband, and A2D
- 76GHz to 81GHz coverage with 4GHz continuous bandwidth
- Four receive channels
- Two transmit channels
- Ultra-accurate chirp (timing) engine based on fractional-N PLL
- TX power: 12.5dBm
- RX noise figure:
  - 14dB (76 to 77GHz)
  - 15dB (77 to 81GHz)
Phase noise at 1MHz:
- -95dBc/Hz (76 to 77GHz)
- -93dBc/Hz (77 to 81GHz)
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
1.5MB on-chip memory
Operating conditions
- –40°C to 105°C junction temperature range
Cortex-R4F microcontroller for object tracking, classification, and interface control
- Supports autonomous mode (loading user application from QSPI Flash memory)
Internal memories with ECC

Integrated peripherals
- Up to six ADC channels
- Up to two SPI channels
- Up to two UARTs
- CAN interface
- I²C
- GPIOs
- 2-lane LVDS interface for raw ADC data and debug instrumentation
IWR1642 advanced features
- Embedded self-monitoring with no host processor involvement
- Complex baseband architecture
- Embedded interference detection capability
Power management
- Built-in LDO network for enhanced PSRR
- I/Os support dual voltage 3.3V/1.8V
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
Operating conditions
- -40°C to 105°C junction temp range