USB Headset Chip for Mobile Phones - NXP Nexperia PNX0161

NXP Semiconductors launched Nexperia PNX0161 low-power USB audio device, a single-chip solution for USB Audio-based headset accessories. Nexperia PNX0161 solution leverages the USB 2.0 standard to move the core audio streaming functions to the USB interface on the host device. This ARM7TDMI-based device provides stereo playback and recording and optional FM radio.

Hans Fleurkens, Mobile & Personal Business Unit, NXP Semiconductors, said:

USB is fast emerging as a de facto connectivity interface in portable devices. NXP is leveraging its pole position to promote the adoption of USB technology with industry-first innovations, setting the stage for the future of USB applications for better connectivity and convenience on mobile phones, consumer electronics and PC peripherals…

…Power consumption was the biggest challenge to the provision of digital audio on a headset, and NXP's PNX0161 is the first to address this most efficiently, while also offering a choice of functionality through a programmable core.

NXP Nexperia PNX0161 USB Headset Chip for Mobile Phones - a Typical Application

Key features of Nexperia PNX0161 USB Audio Headset Chip:

• Single-chip solution for USB headset
• Full-speed (12 Mbps) USB device fully compliant with USB host or USB OTG
• Low power consumption (~10 mA at Vbus)
• USB bus powered (Vbus at 5 V)
• USB Audio and HID Classes
• High suppression of phone noise
• Stereo record and playback at sample rate of 48 kHz
• FM radio via low-power analog bypass mode
• ARM7TDMI core with on-chip SRAM, ROM, and optional NOR Flash
• Intelligent power management
• Wide range of connectivity and audio interfaces
• Available in two versions: programmable Flash or cost-effective ROM
• 88-pin TFBGA package (7 x 7 mm with 0.5-mm pitch)

Nexperia PNX0161 is powered by based on an ARM7TDMI core with an embedded DC/DC converter that is powered through the USB bus. The chip has on-chip 256 KByte NOR Flash, 32 KByte of boot ROM. and KByte of SRAM.

The chip includes I2S I/O interfaces, a master/slave I2C-bus interface, a fast UART with DMA support, a 24-bit stereo ADC with programmable amplifier (for microphone, tuner input and line in), a microphone preamplifier bias, a 24-bit stereo DAC, and a Class AB headphone amplifier.

Stereo recording and playback of Nexperia PNX0161 is operate at a sample rate of 48 kHz. The chip offer full support for HID Class, USB Device Firmware Upgrade, and audio post-processing features like volume control and optionally other sound features.

Nexperia PNX0161 has built-in DSP software, allowing OEMs to pre-set equalizers and maximize echo cancellation for improved sound quality. The solution offers plug-and-play operation with any USB host or OTG (On-The-Go) device and supports USB Audio and HID (Human Interface Device) classes.

The PNX0161 requires very little power (~10 mA at Vbus) for playback mode. Embedded power management functionality, alongside intelligent power control also contributes to this highly power-efficient solution.

The Nexperia PNX0161 is available in two versions that can be switched seamlessly during product ramp-ups: programmable Flash and cost-effective ROM

NXP also expands its applications for a compelling GSM/MP3 docking station reference design for maximum functionality such as mobile phone and MP3 player power charging, FM-radio enabled speakers and Bluetooth connection.

More info: NXP Nexperia PNX0161: USB Headset Chip for Mobile Phones

NXP will be showcasing its USB solutions at its booth (Hall 1.1b, Booth 213) at IFA 2007 in Berlin, Germany from August 31 - September 05.