FSA2000: Auto Selecting HS-USB Switch with Cap-Free Headphone Audio Amplifier

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 40mWRMS per channel.

Features

• Switch Type: USB + Headphone Amplifier
• Switch Mechanism: Auto (USB with V_BUS)
• USB Detection: YES
• USB 2.0 High-Speed & Full-Speed Compliant
• Audio Amplifier: Class AB
• Amplifier Output Power: 40mW_RMS (32W)
• Amplifier Gain: 0dB
• THD+N: 0.1%
• SNR: -90dB
• PSRR: -95dB
• V_CC: 2.7 to 4.3V
• I_CC(Audio): 3mA
• I_CC(USB): 6µA
• Package: 16- Lead UMLP 1.80 x 2.60 x 0.55mm, 0.40mm Pitch

Application Notes