Offered as the industry's first USB-driven digital audio headset solution for mobile phones, the single-chip Nexperia PNX0161 is a small, ultra-low-power Hi-Speed USB 2.0-compliant solution that provides stereo playback and recording, as well as FM radio. The PNX0161 leverages the USB 2.0 standard to shift the core audio streaming functions to the USB connector on the host device alongside the existing battery charging and PC synchronization functions - addressing the trend for ultra-thin mobile devices with a simplified design and a single standardized connection interface.
Built-in DSP software allows designers to pre-set equalizers and maximize echo cancellation for improved sound quality. The programmable ARM7TDMI core is embedded with a DC/DC converter, which powers through the USB bus. Fully compliant with USB specifications, the PNX0161 offers plug-and-play operation with any USB host or On-The-Go (OTG) device and supports USB Audio and Human Interface Device (HID) classes.
The device is available now in a 7 x 7-mm TFBGA88 package and requires about 10 mA at Vbus for playback mode. Embedded power management functionality, alongside intelligent power control also contributes to the part's power efficiency. Especially designed to suppress noise coming from the host, the PNX0161 is available in two versions - programmable Flash or ROM - that can be switched seamlessly during product ramp-ups.
A related product, the GSM/MP3 USB 2.0 docking station reference design, targets systems that bring together the functions of a GSM-based docking station for a mobile phone, an MP3-based docking station for a portable media player and a PC speaker. It includes USB 2.0, audio streaming, and microphone functionality, and has a high-efficiency Class-D amplifier for superior sound from any set of speakers.
PNX0161 technical leaflet (PDF)
GSM/MP3 USB 2.0 docking station reference design technical leaflet (PDF)
NXP Semiconductors, http://www.nxp.com