march 2010 ? 2009 fairchild semiconductor corporation www.fairchildsemi.com FSA2000 ? rev. 1.0.0 FSA2000 ? auto-selecting hs-usb switch with cap-free headphone audio amplifier FSA2000 auto-selecting hs-usb switch with cap-free headphone audio amplifier features switch type usb + headphone amplifier switch mechanism auto (usb with v bus ) usb detection yes usb usb 2.0 high speed & full-speed compliant audio amplifier class ab amplifier output power 40mw rms (32 ? ) 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) 6a package 16- lead umlp 1.80 x 2.60 x 0.55mm, 0.40mm pitch ordering information FSA2000umx applications ? mp3 portable media players ? cellular phones, smartphones description 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. 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: analog.switch@fairchildsemi.com . typical application figure 1. mobile phone example d+ d- 0.1f or 0.1f v- v+ + - v- v+ + - r l d+/ r d-/ l headphone ? amplifiers fs ? / ? hs ? usb 32 ? 32 ? usb data cable auto ? switches ? to ? usb ? when ? v bus present audio ? subsystem usb ? tx eliminates ? large ? 220f ? capacitors
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FSA2000 ? rev. 1.0.0 11 FSA2000 ? auto-selecting hs-usb switch with cap-free headphone audio amplifier
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