FSA2000 Auto-Selecting HS-USB Switch with Cap-Free Headphone Audio Amplifier Description Features Switch Type Switch Mechanism USB Detection The FSA2000 is a low-cost integrated HS-USB and audio switch that incorporates an audio headphone amplifier. This solution eliminates many of the discrete parts currently used in stereo headset applications. It provides stereo headphone drivers designed to operate with a ground-centered output signal. This allows for the removal of large and expensive DC blocking capacitors. The headphone drivers are capable of driving up to 40mW RMS per channel. USB + Headphone Amplifier Auto (USB with VBUS) YES USB 2.0 High Speed & Full-Speed Compliant Class AB 40mW RMS (32Ω) 0dB 0.1% -90dB -95dB 2.7 to 4.3V 3mA 6µA 16- Lead UMLP 1.80 x 2.60 x 0.55mm, 0.40mm pitch FSA2000UMX USB Audio Amplifier Amplifier Output Power Amplifier Gain THD+N SNR PSRR VCC ICC (Audio) ICC(USB) Package Ordering Information Related Resources FSA2000 Demonstration Board FSA2000 Evaluation Board FDB323 — FSA2000 Demonstration Board User Guide FEB322 — FSA2000 Evaluation Board User Guide AN-8032 — Demonstration Board Quick-Start Guide AN-8031 — Utilizing the FSA2000 MUTE Function to Reduce Audio “Click” and “Pop” For samples, questions, or board requests; please contact: [email protected]. Applications MP3 Portable Media Players Cellular Phones, Smartphones Typical Application Auto Switches to USB when VBUS present USB Data Cable FS / HS USB D+ USB TX D+/ R D- + - 0.1µF R Audio Subsystem 0.1µF L Headphone Amplifiers + - V+ V- D-/ L OR V+ 32Ω 32Ω V- Eliminates large 220µF capacitors Figure 1. Mobile Phone Example © 2009 Fairchild Semiconductor Corporation FSA2000 • Rev. 1.0.0 www.fairchildsemi.com FSA2000 – Auto-Selecting HS-USB Switch with Cap-Free Headphone Audio Amplifier March 2010 FSA2000 – Auto-Selecting HS-USB Switch with Cap-Free Headphone Audio Amplifier © 2009 Fairchild Semiconductor Corporation FSA2000 • Rev. 1.0.0 www.fairchildsemi.com 11