Automotive emergency call (eCall) audio subsystem reference design


Design files


The efficiency and diagnostics necessary for automotive emergency call (eCall) systems generate unique requirements for the audio subsystem, such as speaker diagnostics and low-power consumption.  This reference design shows how to use our automotive two-channel audio codec (TLV320AIC3104-Q1) and a class-D audio amplifier (TAS5411-Q1) for eCall applications.

  • The integrated load-dump protection reduces external voltage clamp cost and size
  • Onboard load diagnostics report the status of the speaker through I²C which reduces external components needed for diagnostic coverage
  • TLV320AIC3104-Q1 + TAS5411-Q1 combo allows for reduced power consumption, reduced heat and reduced peak currents in the electrical system
  • TAS5411-Q1 provides up to 8-W output power for loud, clear audio in an unpredictable emergency environment
  • Additional output from TLV320AIC3104-Q1 can be used for the head unit or other car audio needs and eliminates the need for another device
??image.gallery.download_en_US?? View video with transcript Video

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUB26A.PDF (1787 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRJO0.ZIP (1055 K)

Files used for 3D models or 2D drawings of IC components

TIDCBN0.ZIP (1964 K)

Design file that contains information on physical board layer of design PCB

TIDRJN9.PDF (2075 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Speaker amps

TAS5411-Q1Automotive, 8-W, 1-ch, 4.5- to 18-V analog input Class-D audio amplifier w/ I2C diag & load dump

Data sheet: PDF | HTML
Audio CODECs

TLV320AIC3104-Q1Automotive Low-Power Stereo Audio Codec with 6 Audio Input Pins and 6 Audio Output Drivers

Data sheet: PDF | HTML
Audio CODECs

TLV320AIC3109-Q1Automotive Low-Power 96kHz Mono Audio Codec

Data sheet: PDF | HTML
ESD protection diodes

TPD2E007Dual 10-pF, ±13-V, ±8-kV ESD protection diode for AC Signal Data Interfaces

Data sheet: PDF | HTML

Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Design guide Automotive emergency call (eCall) audio subsystem reference design (Rev. A) Jan. 24, 2019

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​