Simplify USB Audio Designs With New USB To I2S Chip


A new USB to I2S digital audio bridge chip from Silicon Labs speeds USB audio applications based on the Android, Windows, Linux and Mac operating systems, such as headphones, headsets, speakers, MP3 accessories, navigation systems and point-of-sale terminals.

The single-chip CP2615 audio bridge is available in a compact 5 mm x 5 mm QFN-32 package, making it ideal for portable audio applications with limited printed circuit board (PCB) space.

The firm claims that developers utilizing the new solution don’t need a USB audio knowledge or protocol expertise, and can focus on their end applications instead of firmware development.

The CP2615 device incorporates a USB 2.0 full-speed function controller, USB transceiver, on-chip oscillator, I2S audio interface, I2C control interface and embedded flash memory for storing device configurations. “This high level of integration eliminates the need for external components, significantly reducing PCB size and BOM cost”, says the firm.

The new audio bridge provides a cost-effective solution for headphones requiring a 48 kHz sampling rate.

The firm notes that many new smartphone designs are eliminating the analog headphone jack, offering only one USB connector to support both charging and audio connectivity. As a result, consumers often buy simple, low-cost dongles that interface the 3.5 mm analog jack to a USB-C to Micro USB adapter, enabling them to continue to use their existing headphones.

“The new device is also ideal for creating USB dongles that interface with high-end headphones that use an analog jack for audio.”

Developers can configure and customize their digital audio applications using the GUI-based Xpress Configurator tool, offered in the firm’s Simplicity Studio development environment, in three easy steps: connect the CP2615 bridge device, configure the USB and audio parameters, and then program the device. A flexible factory programming option is also available to speed development.

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“Silicon Labs really knows the ins and outs of USB development, and we’re passing along our many man-years of USB expertise to developers with plug-and-play USB connectivity solutions like our new CP2615 audio bridge chip,” said Tom Pannell, Senior Marketing Director for IoT products at Silicon Labs. “If you are developing USB-based digital audio applications, you can save considerable time, effort and cost by using Silicon Labs’ CP2615 device, Xpress Configurator tool and evaluation kit.”

Samples and production quantities of the CP2615 digital audio bridge device are available now. CP2615 product pricing begins at $2.51 (USD) in 10,000-unit quantities. The CP2615-EK evaluation kit is available now and priced at $59.00 (USD MSRP).

For additional CP2615 product information, click here.



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