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CP2114 Bridge brings Plug-and-Play to audio design

23 Oct 2012

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Silicon Laboratories Inc. has unleashed what it touts as the industry's first crystal-less USB-to-I2S audio bridge geared to support a range of codecs and digital-to-analogue converters (DACs) used in USB-based audio applications. According to the company, the CP2114 audio bridge chip eases the process of transferring audio data from USB to I2S without time-consuming code development, speeding time to market for USB audio accessories such as speakers, headphones, music boxes, point-of-sale terminals, navigation systems and VoIP systems.

The CP2114 audio bridge integrates a USB 2.0 full-speed function controller, a USB transceiver, crystal-less oscillator, one-time programmable ROM, UART, IIC and I2S interface into a single-chip solution. The device's crystal-less architecture eliminates the need for external clock crystals and associated components, reducing audio system BOM cost and design complexity. The CP2114 audio bridge also requires no external memory when combined with a codec or DAC, further minimising system BOM cost.

The CP2114 audio bridge supports multiple mainstream DACs and codecs from Wolfson Microelectronics, Cirrus Logic and TI, giving customers the flexibility to implement their own preferred audio chipset solution. Silicon Labs offers evaluation kits pre-populated with these popular DAC and codec platforms to further speed design time.

The CP2114 audio bridge uses the standard USB audio device class that is natively supported by most operating systems. USB audio class compatibility eliminates the need to develop and install custom USB software drivers. Host programming capabilities also enable developers to configure practically any external codec or DAC and perform in-field upgrades.

Samples and production quantities of the CP2114 USB-to-I2S audio bridge are available in small-footprint 5 x 5mm QFN packages optimised for space-constrained portable audio applications. The CP2114 device is priced at $1.13 in 10,000-unit quantities.

The CP2114EK, priced at $49, enables developers to evaluate and customise their USB-to-I2S bridge applications through GPIO, UART and IIC peripherals. Silicon Labs also offers additional CP2114 evaluation kits, priced at $82, that are optimised for USB audio applications based on popular codec and DAC platforms.




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