CSR readies Bluetooth headset ref designs

LONDON — CSR (Cambridge, England) has started sampling a Bluetooth version 2.1 headset reference design, dubbed BlueVox2, that will be selling for just $5.

The company says headsets based on the design are expected to be selling by the third quarter of this year.

The design incorporates the company's AuriStream voice codec technology, and allows simultaneous connection of multiple devices, as well as support for Bluetooth version 2.1+EDR. The platform allows headset manufacturers to design products through a 4.5×5.5mm BGA package option.

The eBOM of $5 includes the BlueVox2 QFN chip, together with all of the components necessary for a Bluetooth mono headset mounted on a four-layer printed circuit board. The power efficient design offers 15 hours talktime with a small 120mAh battery.

Separately, CSR has also started sampling a ROM DSP for Bluetooth headset designs, dubbed the BlueVox DSP that integrates the company's CVC (Clear Voice Capture) codec and support for dual-microphone noise suppression.

The mono headset reference design, based on CSR's BlueCore5 multimedia chip, has an electronic BOM of $6.

This includes the audio codec for microphone and speakers, power management, the XAP2++ RISC processor and CSR's proprietary Kalimba DSP core, as well as CVC software.

The BlueVox DSP comes in a 4 layer PCB reference design and is available in both 8x8mm QFN and compact 7x7mm BGA package options. The 7x7mm BGA package option allows easy migration from BlueCore5-Multimedia Flash.

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