Application DescriptionThe advanced driver assist system (ADAS) will see a steep growth in the years to come. One driving factor is the increased safety awareness and the desire for more driving comfort on the customer side. But first and foremost Euro NCAP’s tightened safety requirements will boost installed ADAS equipment from single digit take rates to almost 100% over the next few years. Hence it is to no surprise that the call for a commercially viable solution is on.

In many ways, vehicle safety can be greatly enhanced by vision-based ADAS. By installing rear/front/side cameras and vision processing ECU, multiple features can be implemented to assist the driver in advance. Popular applications include LDW (lane departure warning), HB/LB (high beam and low beam adjust), TSR (traffic sign recognition), parking assist, rear view/surround view, collision avoidance, and so on.

System Requirements and Design ChallengesThe vision ADAS system typically includes video amplifying, encoding, transmitting, decoding, processing, and display. There is a trend toward increased camera resolution and a greater number of cameras. There is an increasing number of functions per system, and comfort features are moving to safety features, so all of these trends increase the requirements for the processor. Meanwhile, there are always higher requirements for the power-to-cost ratio of signal processing.

From the start, the specification for these ADAS camera centric processors targeted the total cost of ownership (TCO) without taking the flexibility out of the hands of the system suppliers and OEMs. Aside from the required programmability and processing power, having the lowest power consumption in class was required in order to keep the thermal design manageable. Support for functional safety following ISO 26262 and the availability of an application oriented development environment with optimized vision processing libraries would enable the design of a total system with “time to market” and low risk in mind.

Solutions from ADIThe ADSP-BF60x family reduces the overall cost of a five function system by up to 30%. The ADSP-BF609 (processing up to megapixel format) and the ADSP-BF608 (processing up to VGA format) support up to five concurrent vision functions with up to 30 processed frames per second. With <1.3 W at an ambient temperature of 105°C, the ADSP-BF60x offer the lowest power consumption figures in their class.

To enable this, Analog Devices deployed a straightforward but unique concept. It is based on two Blackfin® cores as they are used in production ADAS systems today. However, algorithms that can’t be modeled by software in a highly efficient and economical way have been implemented as hardware engines instead, resulting in a highly configurable toolbox of vision processing units. Analog Devices calls this the “pipelined vision processor” (PVP) comma which is now part of the new ADSP-BF60x processors. Although implemented on low power process technology, further innovation was needed to also tackle the dominating power dissipation of modern designs: external memory (DDR2) interfaces. Lowest power dissipation is achieved by distribution of processing and by smart utilization of moderate memory bandwidth. In addition, the Blackfin architecture has been enriched by a number of hardware blocks to address functional safety requirements.

Altogether, ADI provides a broad range of video decoder/encoder, video multiplexer/switch, and video amplifiers with outstanding performance.

Main Signal ChainADAS camera—smart camera ECU

ADI ADAS Vision Solution

automotive.analog.com

Project Code: APM_ADAS_2014

PROCESSING

SMART CAMERA ECU

VISION SENSOR VIDEO OUTOPT. VIDEO OUT

CAR BUS

2 | ADI ADAS Vision Solution

Product Name Description Ta Package

DSPs

ADSP-BF606 Dual 400 MHz core, 148 kB L1, 128 kB L2, external 250 MHz DDR2, 3× ePPI, 1× CAN −40°C to +105°C BGA 349

ADSP-BF607 Dual 500 MHz core, 148 kB L1, 256 kB L2, external 250 MHz DDR2, 3× ePPI, 1× CAN −40°C to +105°C BGA 349

ADSP-BF608Dual 500 MHz core, PVP engine supporting VGA, PIXC engine, 148 kB L1, 256 kB L2, external 250 MHz DDR2, 3× ePPI, 1× CAN

−40°C to +105°C BGA 349

ADSP-BF609Dual 500 MHz core, PVP engine supporting HD, PIXC engine, 148 kB L1, 256 kB L2, external 250 MHz DDR2, 3× ePPI, 1× CAN

−40°C to +105°C BGA 349

ADI Products

ADAS ECU—Camera and Central Processing ECU

ADAS Camera

VISION SENSOR VIDEO OUTVIDEO OUT

CAR BUS

PROCESSING

HEAD UNIT

Notes: The signal chains above are representative of an ADAS system. The technical requirements of the blocks vary, but the products listed in the table are representative of ADI’s solutions that meet some of those requirements.

automotive.analog.com | 3

ADI Products (Continued)

Product Name Description Ta Package

Video Decoders

ADV7180W CVBS decoder, SDTV, 3-channel/6-channel inputs, NTSC/PAL/SECAM input, 8-/16-bit BT656 output −40°C to +125°CLFCSP-32/LFCSP-40LQFP-48/LQFP-64

ADV7181CW RGB decoder, SD/HDTV, 6-channel inputs, NTSC/PAL/SECAM input, 8-/16-bit BT656 output −40°C to +85°C LQFP-64

ADV7182W CVBS decoder, SDTV, SE/Differential inputs, NTSC/PAL/SECAM input, 8-bit BT656 output, cable diagnostics −40°C to +105°C LFCSP-32

ADV7186W6-channel SD/HD decoder, 3D comb filter, bitmap OSD and overlay capability, scaler deinterlacing display controller, LVDS Rx and Tx

−40°C to +85°C BGA-196

ADV7280W 10-bit, 4× oversampled SDTV video decoder with deinterlacer −40°C to +105°C LFCSP-32

Video Encoders/DACs

ADV7392/ADV7393W

SD/HD encoder, YCrCb/RGB input, CVBS/S-Video/YPrPb/RGB output −40°C to +85°C LFCSP-40

ADV7125W CMOS 330 MHz triple 8-bit video DAC, complementary outputs −40°C to +85°CLFCSP-48LQFP-48

RGB-CVBS Converters

AD723W Low cost RGB to PAL/NTSC encoder with load detect, 2.7 V to 5 V −40°C to +85°C TSSOP-28

AD725W Low cost RGB to PAL/NTSC encoder, 5 V −40°C to +85°C SOIC-16

Video Amplifiers

ADA4851-1/ADA4851-2/ADA4851-4W

Single/dual/quad video amplifier, 130 MHz, rail-to-rail output, 3 V to 10 V supply −40°C to +125°CSOT-23/MSOP-8/TSSOP-14

ADA4430-1W Single video amplifier, fixed low pass SD video filter, ultra low power, rail-to-rail output, 2.65 V to 6 V supply −40°C to +125°C SOT-23

ADA4830-1/ADA4830-2W

Difference video amplifier, gain=0.5 MHz, 85 MHz @ 3 dB, short-to-battery protection, 3 V to 5 V supply −40°C to +105°C LFCSP-8

Temperature Sensors

ADT7311W −55°C to +150°C, ±0.5°C accuracy, SPI, 2.7 V to 5.5 V supply −55°C to +150°C SOIC-8

Design Resources

Hardware Development Boards

• ADSP-BF60x standard evaluation board and extender boards

• Frontview ADAS development Kit (please contact ADI sales)

ADSP-BF60x DSP IDE: CCES

Standard Software Modules

• ADAS vision analytics toolbox (AVAT)

• Blackfin image processing toolbox (IPTBX)

• 2D graphics toolbox (GFX2D)

• Download from: www.analog.com/blackfinmodules

Reference Code of Vision ADAS Framework and Algorithms

• Function of LDW, FCW, TSR, HBA, PD (please contact ADI sales)

Technical Hotline

EmailEngineerZoneFree Samples

1-800-419-0108 (India)1-800-225-5234 (Singapore)0800-055-085 (Taiwan) 82-31-786-2500 (Korea)

cic.asia@analog.com

ez.analog.com

www.analog.com/sample

Customer Interaction Center

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