Fact Sheet

Automotive Radar

High-resolution 77 GHz radar

Overview

The automotive industry’s efforts to achieve

a goal of zero automotive-related fatalities,

along with meeting consumer demand and

government legislation, are driving adoption

of advanced automotive safety systems.

Advanced driver assistance systems (ADAS),

radar and camera systems are expected to

become government-mandated in the future.

Freescale’s 77 GHz silicon germanium

(SiGe) chipset advances automotive safety

by enabling vehicles to sense potential

crash situations. This radar solution

provides long- and mid-range functionality,

allowing automotive systems to monitor

the environment around the vehicle to help

prevent crashes.

Freescale’s radar system is based on multi-

channel receivers and transmitters that

allow high-level integration and complex

signal generation and processing. A typical

Freescale RF front-end solution consists of a

transmitter chip with an integrated PLL, power

amplifier and local oscillator (LO) output and

an on-chip ramp generator, along with one or

several multi-channel receivers that provide

the low-noise down conversion of the radar

signals into the intermediate frequencies (IF)

domain.

The chips are manufactured in Freescale’s

0.18 μ BiCMOS technology, which allows the

combination of high-speed bipolar devices

with the high integration level of CMOS. This

technology is ideal for automotive safety

systems and is also applicable for aerospace,

military and industrial markets.

Adaptive Cruise Control

Object Detection

Blind Spot Detection

Stop and Go

Side Impact

Freescale and the Freescale logo are trademarks or registered trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off.

Xtrinsic is a trademark of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners.

Document Number: AUTORADARFS

REV 0

Learn More:

For current information about Freescale

products and documentation, please visit

freescale.com/sensors.

Freescale 77 GHz Technology

Advantages

• Multi-mode, multi-application capability

• Simultaneous long- and mid-range

functionality

Allows one radar to be used for multiple

safety systems:

- Adaptive cruise control

- Headway alert

- Collision warning

- Mitigation and brake support

• Solid-state technology

Highest level integration

- Most advanced SiGe technology with

multi-channel transmitter and receiver

chips

No moving parts

Extremely reliable

• Mixed-signal technology

• Class-leading performance and durability

Freescale: A Leader in Sensing

Solutions

Expanding on its more than 30-year heritage

of sensor innovation, Freescale's Xtrinsic

sensing solutions are designed with the

right combination of high-performance

sensing capability, processing capacity and

customizable software to help deliver smart,

differentiated sensing applications. With

Xtrinsic sensing solutions, our vision is to

offer a diverse and differentiated product

portfolio to meet the expanding needs of

the automotive, consumer and industrial

segments. Xtrinsic solutions offer ideal blends

of functionality and intelligence designed to

help our customers differentiate and win in

highly competitive markets.

Transmitter

• Low power consumption

• Extremely low phase noise

• High output power at 3.3V

• Very precise control over frequency (+/-100

ppm)

• No trimming, no adjustments

• Supports RX designs with local oscillator at

half of the RF frequency (38.25 GHz)

• Ability to monolithically integrate frequency

stabilization (PLL), PA and programmable

FMCW modulation

• SPI interface (optional)

Multi-Channel Receiver

• Multiple channels supported

• Local oscillator at 38.25 GHz

• Local oscillator input power level typical -7 dBm

• Differential IF

• Lowest noise figures

• High IF-to-IF isolation

• Low residual power levels

• Gain/linearity on customer request

• ESD protection (RF and DC)

• SPI (optional)

Application Detection Range Safety Aspect Technology

Adaptive Cruise

Control

200 meters Normal driving, accident

avoidance

•77 GHz Radar

Pre-Crash 30 meters Accident, mitigation of

impact

•77 GHz Radar/24 GHz

Radar

•76/81 GHz Radar

Blind Spot

Detection

20 meters Normal driving, accident

avoidance

•77 GHz/24 GHz Radar/

Vision sensor

Lane Departure

Warning

60 meters Normal driving, accident

avoidance

•Vision sensor

Stop and Go 30 meters Normal driving, accident

avoidance

•77 GHz/24 GHz Radar

•76/81 GHz Radar