Fairchild Semiconductor (NYSE:FCS) has integrated a Class-G headphone amplifier and a Class-D speaker amplifier to support designers of mobile devices such as smartphones and PMPs (portable media players).
Developed the FAB2210 audio subsystem.

The FAB2210 integrates a Class-G stereo cap-free headphone amplifier and a mono filterless Class-D speaker amplifier into a single IC package to provide extended battery life through excellent audio quality and low power consumption characteristics. The device reduces noise when the input signal is low
To this end, it features noise gate technology that automatically mutes the speaker or headphone amplifier, and automatic gain control (AGC) to improve sound quality and increase speaker protection.
For more detailed information and to order samples, please refer to the following site.

http://www.fairchildsemi.com/pf/FA/FAB2210.html

Features and Advantages:

• Cap-free output for BOM (bill of material) reduction and enhanced frequency response characteristics
• Low-noise 105dB SNR (signal-to-noise ratio) characteristics
AGC (automatic gain control) to maximize output volume while minimizing clipping
• Current limiting and thermal protection
• Selectable single-stage or differential audio input for high common-mode rejection
• Settings can be adjusted via I2C control function
• Optimized for use in mobile devices/smartphones, PMPs (portable media players), portable GPS devices, gaming devices, digital voice recorders, etc.

As a mobile technology leader, Fairchild Semiconductor offers a vast portfolio of analog and power IP that can be optimized to meet specific design requirements. By integrating leading circuit technologies into ultra-small, advanced packages, Fairchild provides significant benefits to mobile users while reducing design size, cost, and power. Fairchild's mobile IP is adopted in most devices used today.

More detailed information about Fairchild's mobile solutions can be found on the Fairchild website below. http://www.fairchildsemi.com/applications/diagrams/mobile.html

Fairchild Semiconductor: Solutions for Your Success™

Price: $0.51 based on a supply of 1,000 units

Status: Samples provided upon request

Delivery: 8–12 weeks after order placement