Project Code: APM-AUTO-AUDIO-2014
Analog Devices Chipset Solution for
Automotive Head Units and Audio Amplifiers
Application Description
Automotive head unit and audio amplifier are the main portions of automotive infotainment system.
The head unit system combines the functions of audio/video playback, navigation, and telematics, offering the passsengers a comfortable and convenient
driving experience. The typical functions of the system include FM/AM, digital, and satellite radio, a CD/DVD player, multimedia peripheral connections, rear
seat entertainment, navigation assistance, camera integration, and Bluetooth® as well as other telecom connectivity.
The standalone audio amplifier is connected to the multichannel speakers to transform the vehicle into a diverse acoustic environment, by providing high fidelity
audio enjoyment. Typical functions of this system include powerful sound processing, active noise control within the car, and engine sound simulation.
System Requirements and Design Challenges
In addition to the basic audio/video playback function, modern head unit and audio amplifier systems are expected to deliver higher audio/video performance,
more connectivity, HDMI with easier access, and less power consumption. More digital signal processing and more advanced audio algorithms are integrated in
the system in order to improve acoustic experience and compensate for cabin response.
Solutions from ADI
As one of the leading companies that focuses on high performance signal processing and has rich experience in automotive electrical field, ADI offers a broad
portfolio of automotive-qualified products for head unit and audio amplifier systems.
We provide a broad set of video decoders, encoders, and coprocessors with best-in-class signal performance and functionality. Our audio codecs provide
diverse channel options and high SNR/THD. We provide resistive and capacitive touch screen interfaces with high resolution and noise filtering functionality as
well as HDMI®/MHL/APIX2 interface devices with low power consumption.
The fixed-point audio SigmaDSP® processors and floating-point audio SHARC® are widely adopted as audio coprocessors for high performance and high
efficiency audio postprocessing and routing/mixing. The award winning GUI tool, SigmaStudio ,™ makes coding the DSP as simple as building a flowchart.
Analog Devices' highly integrated Blackfin® DSP family is available for multimedia connectivity, network connections, and software audio processing applications.
In addition to DSP, we provide a wide range of software modules, such as decoding, surround sound, and virtualization.
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The Main Signal Chain—Head Unit
NAVIGATION
GPS
RF
GYRO/ACCELEROMETER
TOUCH SCREEN CONTROLLERS
SATELLITE (SXM) RF
VIDEO
APIX2 Rx
NAVIGATION
DISPLAY
GRAPHICS
VIDEO DECODER
APIX2 Tx
HDMI/MHL Rx
VIDEO
COPROCESSOR
VIDEO ADC
VIDEO AMPLIFIER
MICROPHONES
AUDIO/TELEMATICS
HDMI Tx
AUDIO ADC, CODEC
AUDIO POSTPROCESSING
HF/SR/BT/MP3/AAC
NETWORK STACK
VIDEO
DAC
VIDEO
AMPLIFIER
MOST/CAN/ETHERNET PHY
CLASS A/B/D AMPLIFIER
POWER
MANAGEMENT
SUPERVISORY
FPGA/CPLD
AM/FM/DAB/GSM
BT RF
AUDIO POSTPROCESSING
The signal chains above are representative of the head unit design. The technical requirements of the blocks vary, but the products listed in the table below are representative of
ADI's solutions to meet some of those requirements.
The Main Signal Chain—Standalone Audio Amplifier
PROCESSING BLOCKS
AUDIO DECODERS
AUDIO POSTPROCESSING
MICROPHONES
AUDIO ADC, CODEC
VIBRATION SENSORS
CLASS A/B/D
AMPLIFIER
SUPERVISORY
AUDIO DAC
CODEC
MOST/CAN/ETHERNET PHY
NETWORK STACK
CONTROLLER
POWER
MANAGEMENT
The signal chain above is representative of the design for a standalone audio amplifier. The technical requirements of the blocks vary, but the products listed in the table below are
representative of ADI's solutions to meet some of those requirements.
2 | Analog Devices Chipset Solution for Automotive Head Units and Audio Amplifiers
ADI Products
Part Number
Description
Package
Key Advantages
SigmaDSP
ADAU1401A
28-/56-bit, 50 MIPS, 4 kB parameter RAM, 2× ADC, 4× DAC, 8 inputs and
8 outputs digital audio, 12× GPIO, EEPROM self boot supported
48-lead LQFP
ADAU1442/
ADAU1445/
ADAU1446
28-/56-bit, 175 MIPS, 16 kB parameter RAM, 24 inputs and 24 outputs digital
audio, 12× GPIO, sample rate converter, self boot supported
100-lead TQFP/
100-lead LQFP
Sigma 200, high MIPS, multiple audio channels,
sample rate converter
ADAU1450/
ADAU1451/
ADAU1452
32-bit, 294 MIPS, 40 kB parameters/data RAM, 48-channel digital audio
input and output, 10 SAR AUX control ADC, 16-channel sample rate converter,
EEPROM self boot supported
72-lead LFCSP
Sigma 300, higher MIPS, more audio channels,
sample rate converter
ADSP-21467/
ADSP-21469
32-/40-bit floating-point, 450 MHz, 5 Mb SRAM, FIR/IIR/FFT accelerometer,
16-bit DDR2 interface, S/PDIF/DTCP, 8× I2S/TDM, 2× SPI, 16× PWM
324-lead PBGA
The fourth generation SHARC processor, higher
MHz, hardware acceleration unit
ADSP-21477/
ADSP-21478/
ADSP-21479
32-/40-bit floating-point, 266 MHz, 3 Mb SRAM, FIR/IIR/FFT accelerometer,
16-bit SDRAM interface, S/PDIF/DTCP, 8× I2S/TDM, 2 SPI, 16× PWM
88-lead LFCSP/
100-lead LQFP
Low cost version of the fourth generation
SHARC processor
ADSP-21486/
ADSP-21487/
ADSP-21488/
ADSP-21489
32-/40-bit floating-point, 400 MHz, 3 Mb SRAM, FIR/IIR/FFT accelerometer,
16-bit SDRAM interface, S/PDIF/DTCP, 8× I2S/TDM, 2× SPI, 16× PWM
100-lead LQFP/
176-lead LQFP
Low cost version of the fourth generation
SHARC processor
ADSP-BF592
400 MHz, 68 kB L1, 2× SPI, 2× SPORT, 2× UART, 1× PPI, 32× GPIO
64-lead LFCSP
Low cost, universal
ADSP-BF525
400 MHz/533 MHz, 132 kB L1, 1× USB, 1× SPI, 2× SPORT, 2× UART,
1× PPI, 48× GPIO, Lockbox® security mechanism
208-lead BGA
Low power consumption, various peripherals,
Lockbox
ADSP-BF531/
ADSP-BF532/
ADSP-BF533
400 MHz/600 MHz, 52 kB/84 kB/148 kB SRAM, 1× SPI, 2× SPORT,
1 UART, 1× PPI, 16× GPIO
160-lead BGA/
169-lead BGA/
176-lead LQFP
Low power, universal
ADSP-BF534
500 MHz, 132 kB SRAM, 1× CAN, 1× SPI, 2× SPORT, 2× UART, 1× PPI,
48× GPIO
182-lead BGA/
208-lead BGA
CAN PHY
ADSP-BF539
533 MHz, 148 kB SRAM, 1× CAN, 3× SPI, 4× SPORT, 3× UART, 1× PPI,
38× GPIO
316-lead BGA
CAN PHY, navigation/entertainment/audio
processing
ADSP-BF542/
ADSP-BF544/
ADSP-BF549
533 MHz/600 MHz, 324 kB SRAM, DDR SDRAM interface, 18/24 EPPI
(with LCD), 8-/16-bit EPPI, ATAPI, NAND flash controller, 1× USB, 2× CAN,
3× SPI, 152× GPIO, Lockbox security mechanism
400-lead BGA
Multiple systems connections
196-lead BGA
Hardware coprocessor, multiple functions, high
simulation performance
Sigma 100, built-in ADC and DAC
SHARC DSP
Blackfin DSP
Video Coprocessor
ADV7186
6-channel SD/HD decoder, 3D comb filter, bitmap OSD and overlay capability,
scaler and deinterlacing display controller, LVDS Rx and Tx
Video ADC
32-lead LFCSP/
40-lead LFCSP/
48-lead LQFP/
64-lead LQFP
Best-in-class simulation performance
RGB decoder, SD/HDTV, 6-channel inputs, NTSC/PAL/SECAM input,
8-/16-bit BT656 output
64-lead LQFP
Best-in-class simulation performance
ADV7182
CVBS decoder, SDTV, SE/differential input, NTSC/PAL/SECAM input, 8-bit BT656
output, cable diagnostics
32-lead LFCSP
Single-ended/differential input, cable diagnostics
ADV7280/
ADV7280-M
CVBS decoder, SDTV, 4-channel/8-channel inputs, NTSC/PAL/SECAM input,
8-bit BT656 output/MIPI output, interlaced-to-progressive conversion
32-lead LFCSP
MIPI output, interlaced-to-progressive conversion
ADV7281/
ADV7281-M/
ADV7281-MA
CVBS decoder, SDTV, 4-channel/6-channel/8-channel input, differential input
supported, NTSC/PAL/SECAM input, 8-bit BT656 output/MIPI output, two way
diagnostic input
32-lead LFCSP
Single-ended/differential input, MIPI input/output
with diagnostics
ADV7282/
ADV7282-M
CVBS decoder, SDTV, 4-channel/6-channel input, differential input supported,
NTSC/PAL/SECAM input, 8-bit BT656 output/MIPI output, interlaced-to-progressive
conversion, two-way diagnostic input
32-lead LFCSP
Single-ended/differential input, MIPI output,
interlaced-to-progressive conversion, with diagnostics
ADV7180
CVBS decoder, SDTV, 3-channel/6-channel inputs, NTSC/PAL/SECAM input,
8-/16-bit BT656 output
ADV7181D
analog.com/automotive | 3
ADI Products (Continued)
Part Number
Description
Package
Key Advantages
Video DACS
ADV7390/
ADV7391/
ADV7392/
ADV7393
SD/HD encoder, YCrCb/RGB input, CVBS/S-video/YPrPb/RGB output
32-lead LFCSP/
40-lead LFCSP
CVBS encoders, high simulation performance
ADV7125
CMOS, 330 MHz, triple 8-bit video DAC, complementary outputs
48-lead LFCSP/
48-lead LQFP
RGB encoders, high simulation performance
AD723
Low cost RGB to PAL/NTSC encoder with load detection, 2.7 V to 5 V
28-lead TSSOP
ADA4851-1/
ADA4851-2/
ADA4851-4
Single/dual/quad video amplifier, 130 MHz, rail-to-rail output, 3 V to 10 V supply
23-lead SOT/
8-lead MSOP/
14-lead TSSOP
Video receiver, high speed, flat gain, low cost
ADA4891-1/
ADA4891-2/
ADA4891-4
Single/dual/quad video amplifier, 220 MHz, rail-to-rail output, 2.7 V to 5.5 V supply
23-lead SOT/
8-lead MSOP/
14-lead TSSOP
Video receiver, high speed, flat gain, low cost
ADA4430-1
Single video amplifier, fixed low-pass SD video filter, ultralow power, rail-to-rail
output, 2.65 V to 6 V supply
23-lead SOT
Video driver, SD low-pass filter, flat gain, low
power consumption
ADA4830-1/
ADA4830-2
Difference video amplifier, gain = 0.5, 85 MHz @ 3 dB, short-to-battery protection,
3 V to 5 V supply
8-lead LFCSP
Video receiver, short circuit protection,
low cost
ADA4432-1/
ADA4433-1
Single-channel SD video amplifier, battery short circuit protection, fifth-order
low-pass video filter, ultralow power consumption
8-lead LFCSP/
23-lead SOT
Video receiver, short circuit protection,
low power consumption
ADG1411
Quad SPST, 1.8 Ω RON, 170 MHz, 4.5 V to 16.5 V supply
16-lead LFCSP
Low RON, high channel matching
ADG786
Triple SPDT, 2.5 Ω RON, 160 MHz, 1.8 V to 5.5 V supply
20-lead LFCSP
Low voltage, low RON
ADG5412
High voltage, quad SPST, latch-up
16-lead TSSOP/
16-lead LFCSP
High voltage, latch-up
Video Amplifier
Video Multiplexer
Touch Screen Interface
AD7879
4-wire touch screen digitizer, LCD noise reduction, on-chip reference and
temperature sensor
16-lead LFCSP
Low voltage, noise reduction
AD7147
Programmable capacitance-to-digital converter, 13-channel, single electrode
capacitance, automatic calibration logic
24-lead LFCSP
Programmable on-chip automatic calibration logic
ADV7611/
ADV7612
Single-channel/dual-channel, HDMI 1.4a, 165 MHz, all mandatory/additional 3D
video formats, 24 output pixel bus, S/PDIF or 8-channel I2S audio
64-lead LQFP/
100-lead LQFP
Low power consumption
ADV7480/
ADV7481/
ADV7482
MHL 2.1, 75 MHz; HDMI 1.4a, 165 MHz; 8-channel analog input with
diagnostics, dual MIPI-CSI 2.0 outputs, 8 TTL digital input/output
100-lead BGA
Low power consumption, HDMI/MHL dual mode,
MIPI-CSI 2.0 output
HDMI transmitter, 225 MHz, HDMI 1.4, DVI 1, 3D video formats supported,
RGB, YCrCb, DDR and ITU656 input supported, 8-channel I2S,
S/PDIF audio input, maximum sampling speed of 192 KHz
100-lead LQFP
HDMI transmitters
API × 2 receiver, dual HDCP 1.4 decoding supported, daisy-chaining;
open LDI input, 85 MHz; dual MIPI-CSI 2.0 output; color gamut conversion,
4:2:2 to 4:4:4; support I2C host, MII, HDCP repeater
100-lead BGA
API × 2 receiver, MIPI-CSI 2.0 output, open LDI
input supported, with video processing
64-lead LFCSP/
100-lead LQFP
API × 2 transmitter, dual HDMI receiver, BT656
input, two way communication, dual display
supported
HDMI/MHL Rx
HDMI Tx
ADV7511
APIX2 Rx
ADV7782
APIX2 Tx
ADV7680/
ADV7682
API × 2 transmitter, 3 Gbps; dual HDMI receiver, HDCP 1.4 content protection
supported; dual display supported, 3D linear deinterlacing; BT.656 input;
7.1-channel, 24-bit, stereo audio sample rate conversion; two-way
communication (100 M ethernet, SPI, I2C, GPIO)
4 | Analog Devices Chipset Solution for Automotive Head Units and Audio Amplifiers
ADI Products (Continued)
Part Number
Description
Package
Key Advantages
Audio Codecs
ADAU1961
24-bit, 96 kHz, 1× MIC, 2× differential ADC, 2× differential + 1× single
channel DAC, 99 dB SNR
32-lead LFCSP
Integrated MIC interface, high signal-to-noise ratio
AD1937/
AD1938
24-bit, 192 kHz, 4× differential ADC, 8× differential/single-ended DAC,
102 dB SNR
64-lead LQFP/
48-lead LQFP
High number of channels, high signal-to-noise ratio
ADAU1962/
ADAU1966
24-bit, 96 kHz, 12×/16× differential DAC, 118 dB SNR
80-lead LQFP
High number of channels, high signal-to-noise ratio
ADAU1977/
ADAU1978
24-bit, 96 kHz, 4× differential ADC, 106 dB SNR, with microphone interface
40-lead LFCSP
High number of channels, high signal-to-noise ratio
ADAU1979
24-bit, 192 kHz, 4× differential ADC, 4.5 V rms ac-coupled input
40-lead LFCSP
High number of channels, high signal-to-noise ratio
Gyroscopes/Accelerometers
16-lead SOIC
Excellent null offset, high vibration rejection ratio,
continuous self testing
ADXRS810W
MEMS angular rate sensor, 300°/sec range, 16-bit, 3.3 V/5 V power supply, SPI
ADXL312/
ADXL313
MEMS accelerometer, 3-axis, ±1.5 g/±3 g/±6 g/±12 g range, 2.9 mg/LSB,
2.0 V to 3.6 V power supply, SPI/I2C
32-lead LFCSP
ADM8318/
ADM8319/
ADM8320/
ADM8321/
ADM8322
Watchdog, manual reset, push-pull output, 26-level reset threshold, 4-level
timeout reset setting, 4-level timeout reset setting
23-lead SOT
Ultralow power consumption
ADM8323/
ADM8324
Watchdog, manual reset, push-pull/open collector output, 26-level reset
threshold, 4-level timeout reset setting
23-lead SOT
Low power consumption
Ultralow power, embedded FIFO, high impact
resistance
Power Monitoring
Design Resources
SigmaStudio is the software for programming
Developing, and tuning SigmaDSP and SHARC DSPs. Common processing blocks can be wired together, while the compiler generates a DSP ready code and a
control surface for setting and tuning parameters.
• SigmaStudio standard algorithms include, but are not limited to, the following:
• FIR/IIR filters, crossovers, blocking
• Peak detector, rms detector, level detector, slicer
• Dynamic bass, stereo capture
• Lookup table, volume control, mute
• Mixers, splitters, hard/soft clipping
• SigmaStudio plug-in algorithms are from the following companies:
• AM3D (power bass)
• Dolby® (DAEP, headphones, virtual speaker, prologic)
• BBE (MP, ViVA)
• SRS (circle sound, TruBass®, TruSurround® XT, WOW, WOW HD)
• DTS (surround sensation)
• EmbracingSound (TH4)
• ADI (surround sound, virtual, EAS, ultralow sound)
analog.com/automotive | 5
Blackfin DSP IDE: Visua VisualDSP++®
Evaluation Board:
• ADV7280/ADV7280-M/ADV7281/ADV7282 Evaluation Board—www.analog.com/EVAL-ADV7280MEBZ
• ADV7186 Evaluation Board
• ADAU1450/ADAU1451/ADAU1452 Evaluation Board—www.analog.com/EVAL-ADAU1452
• ADSP-21469/ADSP-21479/ADSP-21489 Evaluation Board EZ-KIT LITE®—www.analog.com/21469-EZLITE
• ADSP-BF592/ADSP-BF525/ADSP-BF533 Evaluation Board—www.analog.com/BF592-EZLITE
• Evaluation Boards for Video Amplifiers, Video Multiplexers, Audio Codecs
Circuits from the Lab®:
• Reconstruction Video Filter Using the ADA4430-1 Amplifier After the ADV7393 Video Encoder (CN0101)—www.analog.com/CN0101
• Low Cost Differential Video Receiver Using the ADA4851 Amplifier and the ADV7180 Video Decoder (CN0060)—www.analog.com/CN0060
• USB Powered DVI/HDMI-to-VGA Converter (HDMI 2 VGA) with Audio Extraction (CN0282)—www.analog.com/CN0282
• Quad HDMI Input, Fast Switching Multiplexer Using the ADV7612 Receiver with Extended Temperature Range (CN0224)—www.analog.com//CN0224
For more automotive applications and product information, please visit:
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