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Fairchild Semiconductor Electronic Components Datasheet

FAN3800 Datasheet

Mono / Stereo Audio Amplifier

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October 2007
FAN3800 — Mono / Stereo Audio Amplifier with
Microphone Pre-Amplifier and EMU Interface
Features
ƒ Regulated positive supply
ƒ Negative supply generator allows ground-centered
output swing
ƒ Dual speaker drivers with mono/stereo switch
capability
ƒ Capable of driving 16mWRMS per channel
ƒ Complete external microphone interface
ƒ Enhanced mini-USB bus detection and interface
circuitry
ƒ Manual and remote send-end switch interface
ƒ Pop and click suppression
ƒ Single 2.7V to 4.5V operation
ƒ 2kV ESD (HBM) protection
ƒ MLP 24-pin package
Applications
ƒ One-piece stereo/mono headset with microphone
ƒ EMU to 3.5mm stereo headphone adapter
www.DataShƒeet4EUM.coUmto 2.5 or 3.5 adapter for stereo headset with
microphone
Description
The FAN3800 is a low-cost solution that integrates the
many discrete parts currently used in stereo headset
applications. It provides mono / stereo speaker drivers
and a complete microphone interface. Additionally, the
FAN3800 allows headset detection and identification
through a 5-pin, enhanced mini-USB (EMU) bus.
Manual and remote send-end switching is supported.
The FAN3800 speaker drivers are designed to operate
with a ground-centered output signal. This allows
removal of large and expensive DC blocking capacitors.
In addition, it allows interfacing with externally powered
speakers. The speaker drivers are capable of driving up
to 16mWRMS per channel.
FAN3800 delivers a complete solution for interfacing an
external microphone. The microphone interface
provides a regulated, high PSRR supply, differential
input sense to single-ended output driver amplifiers,
and output muting. Gain is fixed at 36dB and can be
attenuated externally with a resistor divider network.
Send-end switching automatically routes the
microphone output to the D+ output. When activated,
the speakers switch from stereo to mono mode, both
driven by the D- input. Pop and click noise is minimized
during switching. Send-end information can be
generated manually through an external switch or
through the EMU bus interface.
ID
MUTE
BYPASS
MIC+
MIC-
MICSUP
MLP-24
4x4mm
CPOUT
V-
SPKLOUT
VS
SPKROUT
D+
Ordering Information
Part Number
FAN3800MLP24X
Pb-Free
© 2007 Fairchild Semiconductor Corporation
FAN3800 • Rev. 1.0.0
Figure 1. FAN3800 Pin Out
Package
24-Pin Molded Leadless Package (MLP)
Packing Method
Pack
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FAN3800 Datasheet

Mono / Stereo Audio Amplifier

No Preview Available !

Block Diagram
VBUS
D-
D+
ID
GND
VS
VS
SPKLIN
D-
SPKRIN
D+
V+ CP1 CP2 CPOUT
2.5V
Suppl y
Vpos
MIC
BIAS
Neg Suppl y
D-
Rstereo
Vpos
Rmono
V-
Vpos
V-
0dB
V-
Vpos
0dB V-
MICBIAS
ID Bias
SE N D /EN D
N.O.
SW 1
www.DataSheet4U.com
Rid
102k
GND
GND
38dB
D-
Audi o
Re mo val
Filter
MICSW
Bias
V+
MUTE
R1
MUTE
R2
SPKLOUT
SPK R OU T
BYPASS
MICSUP
R mic
MIC+
MIC-
R mic
Figure 2. Block Diagram
© 2007 Fairchild Semiconductor Corporation
FAN3800 • Rev. 1.0.0
2
www.fairchildsemi.com


Part Number FAN3800
Description Mono / Stereo Audio Amplifier
Maker Fairchild Semiconductor
Total Page 9 Pages
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