A remote tuner solution that simplifies car audio system design and reduces cable connections

Maxim announces the industry's first in-vehicle remote tuner solution, with a single hardware platform supporting global broadcast standards. The solution uses the MAX2175 RF to Bit to RF tuner to reduce cabling and simplify car audio system design.

Maxim introduces a remote tuner solution that helps designers significantly simplify car audio system design and reduce cabling. The MAX2175RF to Bitstream Tuner in the solution supports global broadcast standards and requires no modifications to the automotive hardware. Simply modify the vehicle software to upgrade.

Traditional car radios present many challenges for automotive design. Complex audio systems need to support multiple tuners, control heat dissipation, and receive signals from multiple cables from the antenna. In addition, the received analog signal picks up a lot of noise during transmission from the antenna to the car audio system. In addition, baseband processing requires dedicated hardware and separate designs to support broadcast standards in different regions of the world.

Maxim's latest remote tuner solution, RF-to-bit stream tuner, can be installed in a quiet environment close to the antenna to minimize noise. Serialize the tuner's digital output to a low-cost Coaxial Cable using Maxim's Gigabit Multimedia Serial Link (GMSL) serializer/deserializer (SerDes) for remote tuner over the same cable powered by. Not only does it improve the performance of the radio signal, but it also reduces the weight of the vehicle for a longer range.

By eliminating the need for a car audio system to support different regional standards of the tuner, it saves space and reduces system complexity and heat consumption. For example, for a 4-channel radio system, the overall audio system can be reduced by 4W. In addition, the MAX2175 enables baseband processing to be implemented via software such as Renesas Electronics' R-Car H3 SoC and other automotive system-on-a-chip (SoC). This software-defined radio (SDR) solution eliminates the need for a dedicated baseband processor and increases design flexibility. Now, simply change the software to support the global broadcast standard with the MAX2175.

Main advantage

• Design flexibility and scalability: Designers can optimize a single remote tuner platform, manage the number of channels in the remote tuner to support different applications, without having to redesign the car audio system; simply change the software to support global broadcast standards.

• Simplify design and save space: Use the deserializer to connect the SoC to replace the multi-tuner solution, reducing system complexity, saving space, and reducing sound system heating. Available in a 48-pin 7mm x 7mm TQFN package (temperature range: -40°C to +85°C)

• Improve radio signal performance: The tuner is closer to the antenna; digital signals are used instead of analog signals for clearer signals.

• Increase car cruising range: Reduce cable weight by reducing cable count.

The Maxim Remote Tuner solution includes the following Maxim products:

• MAX2175 analog/digital hybrid radio receiver with integrated RF to bit front end

• MAX96708 14-bit GMSL Deserializer

• MAX96711 14-bit GMSL serializer

• MAX15027 1A, low dropout linear regulator

• MAX20002 36V, 2A, Synchronous Buck Converter

Evaluation

• “By reducing cables, we provide OEMs with space-saving, simple design solutions and performance improvements.” Maxim Integrated Automotive Business Unit General William Chu said, “Maxim is currently the only RF and SerDes solution in the solution. And the power company."

• “For the best performance in the best category, Fraunhofer IIS has designed a complete core development kit (CDK) for software digital radio”, said MarTIn Speitel, head of Fraunhofer IIS infotainment business group, “By working with Maxim, we develop A complete software radio solution that provides clearer broadcast signals for automotive applications."

• “Software radio is the future of automotive electronics and is already coming to us.” Luca De Ambroggi, principal analyst for automotive semiconductors at IHS Markit, said, “I see the electronics in the car becoming like a powerful one. Personal computer. Just like a PC, if you want to add new features, just download and install the appropriate software program without changing the hardware."

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