How Texas Instruments’ mmWave Radar Sensors Are Reshaping Automotive Safety

As advanced driver-assistance systems (ADAS) become more accessible — even in entry-level vehicles — the importance of robust sensing technologies is growing rapidly. A critical component in this evolution is millimeter-wave (mmWave) radar, which is quietly becoming the unsung hero in making both the inside and outside of our vehicles safer.

Why mmWave Radar Matters

For modern vehicles, safety is a symphony of sensors working in harmony. While cameras and ultrasonic sensors have played a key role, mmWave radar brings a distinct set of advantages. Operating between 10 GHz and 200 GHz, and typically at 24 GHz, 60 GHz, or 77 GHz in automotive applications, mmWave radar offers high precision in both long- and short-range scenarios.

Unlike optical sensors, mmWave radar performs consistently in low visibility — such as rain, snow, or fog — and doesn’t compromise user privacy. It can also detect micro-movements like breathing or heartbeats, making it ideal for both exterior sensing (collision avoidance, blind spot monitoring) and interior monitoring (child presence detection, intrusion alerts, and occupant classification).

The All-in-One Advantage: TI’s Single-Chip Radar

Traditionally, implementing radar involved multiple discrete chips — complex and costly. Texas Instruments (TI) has streamlined this process by integrating all key radar components — including RF transceivers, analog and digital processing chains, and edge AI — into a single chip. This not only cuts the system size by up to 50%, but also slashes power consumption and cost.

AWRL6844: The Flagship for In-Cabin Safety

At the forefront of TI’s mmWave radar portfolio is the AWRL6844, a next-gen radar sensor built with a high-performance RF front-end (4 Tx, 4 Rx for 16 virtual channels), and powered by a heterogeneous multi-core architecture:

Arm R5F core (200 MHz) for control and system management

HWA 1.2 accelerator (200 MHz) for fast Fourier transforms and signal processing

C66x DSP (450 MHz) for post-processing and advanced algorithms

2.5 MB on-chip RAM for real-time performance

This robust architecture enables onboard AI, making it possible to perform real-time occupant detection, classify passengers, and distinguish between adults and children with over 90% accuracy — all without a cloud connection.

Child Presence Detection (CPD): Meeting Global Safety Standards

From 1990 to 2023, more than 1,000 children in the U.S. tragically died from vehicular heatstroke. More than half of these deaths occurred when caregivers unintentionally left children behind. Governments and safety regulators are now pushing for mandatory in-cabin monitoring systems. The EU has already made CPD a requirement in its Euro NCAP 2025 roadmap, with the U.S. and China expected to follow suit.

TI’s mmWave radar is uniquely suited for CPD. Unlike cameras (privacy issues) or UWB (limited to CPD only), mmWave enables multiple features with a single chip, including:

CPD

Occupancy and position detection

Intrusion monitoring

It also comes at a lower cost — typically around 80% of UWB-based solutions — offering automakers a scalable path to compliance and enhanced safety.

Smart Packaging: AoP and LoP Technologies

Texas Instruments is also innovating on the packaging front. Traditional PCB-mounted antennas can limit design flexibility. TI’s proprietary Antenna-on-Package (AoP) and Antenna-in-Package (LoP) technologies embed antenna elements into or within the package, reducing signal loss, saving space, and simplifying integration — especially useful in compact cabin environments.

Security Built-In

With vehicles becoming more connected, cybersecurity is no longer optional. The AWRL6844 meets ASIL-B safety standards and integrates a hardware security module (HSM) that supports secure boot, key management, and encryption — complying with ISO 21434 and even China’s SM2/SM3/SM4 cryptographic standards.

TI’s Comprehensive Radar Portfolio

Texas Instruments offers mmWave radar solutions for almost every automotive sensing application:

Exterior: Forward radar, corner radar, blind spot detection, 4D imaging radar.

Interior: CPD, occupant monitoring, seatbelt reminders, intrusion detection, gesture recognition, and door sensing

Each chip is optimized for its use case, helping automakers speed up development without compromising safety or cost.

Final Thoughts: A Safer Road Ahead

Millimeter-wave radar is more than just a sensor — it’s a cornerstone of future mobility. Its ability to deliver high-resolution, privacy-respecting, weather-proof sensing — inside and outside the vehicle — makes it indispensable for tomorrow’s safety systems.

With its integrated, scalable, and secure mmWave solutions, Texas Instruments is enabling a new generation of safer, smarter vehicles. As regulations push forward, and consumer expectations evolve, technologies like the AWRL6844 are setting new benchmarks for what in-cabin and exterior sensing can achieve.