FAIRCHILD FSA2000

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
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
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”
ƒ For samples, questions, or board requests; please
contact: [email protected].
Applications
ƒ MP3 Portable Media Players
ƒ 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
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