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PDF FSA8049 Data sheet ( Hoja de datos )
| Número de pieza | FSA8049 | |
| Descripción | Audio Jack Detection and Configuration | |
| Fabricantes | Fairchild Semiconductor | |
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August 2012
FSA8049
Audio Jack Detection and Configuration, MIC / GND
Cross Point Switch
Features
Detection
VDD
THD (MIC)
ESD (IEC 61000-4-2)
(Air Gap)
Operating Temperature
Package
Top Mark
Ordering Information
Audio Plug GND & MIC Polarity
2.5 to 4.4 V
0.002% Typical
15 kV
-40°C to 85°C
9-Ball WLCSP 3x3 Array, 0.4 mm
Terminal Pitch, 250 µm Ball
M3
FSA8049UCX
Applications
Cellular Phones, Smart Phones
MP3 and Portable Multimedia Player
Description
The FSA8049 is an audio jack detection switch for 3- or
4-pole accessories. The FSA8049 detects the locations of
ground (GND) and microphone (MIC) poles on the audio
plug and automatically routes them to the appropriate
connections. This allows the end user to plug accessories,
such as headsets with different audio pole configurations,
into the mobile device and have them operate correctly.
Detects 3- or 4-pole audio accessories
Detects polarity of GND and MIC on 4-pole plugs
Automatically routes GND and MIC to audio jack terminals
Related Resources
For evaluation boards and questions, please contact:
Typical Application
Baseband
Processor
GPIO
Audio
Sub System
MIC Bias
MIC
RMIC
CMIC
VDD
EN Oscillator &
Logic
CEXT
Switch Enable
Timing
MIC
5Ω
Detection
To Audio Plug
Detection Circuit
Audio Jack
LSPKR
RSPKR
GND/MIC1
3Pole
4Pole
GND/MIC2
tOn/Off
Capacitor
GND
100mΩ
GNDA
Figure 1. Mobile Phone Example
© 2011 Fairchild Semiconductor Corporation
FSA8049 • Rev. 1.0.2
www.fairchildsemi.com
1 page  
AC Electrical Characteristics
All typical values are at TA=25°C unless otherwise specified.
Symbol
Parameter
VDD (V)
Condition
TA = -40 to +85°C Unit
Min. Typ. Max.
MIC Switch
THD
Total Harmonic Distortion(5)
OIRR
Off Isolation(5)
RT=600 Ω, VSW=0.5 VPP,
3.8
f=20 Hz to 20 kHz,
VIN=1.8 V and 2.2 V
(Figure 4)
f=20 kHz, RS=32 Ω,
CL=0 pF, RT=32 Ω
(Figure 5)
3.8
f=20 KHz, RS=600 Ω,
CL=0 pF, RT=600 Ω
(Figure 5)
0.002
-108
-85
%
dB
Parallel I/O
CEXT=Float
tON-GNDA
Switch Turn-On Time (MIC & GND
Switch), Measure 10/90
3.8
RL=10 kΩ, CL=10 pF
CEXT=0.1 µF
RL=10 kΩ, CL=10 pF
200 µs
140 ms
CEXT=Float
tOFF-GNDA
Switch Turn-Off Time (MIC & GND
Switch), Measure 10/90
3.8
RL=10 kΩ, CL=10 pF
CEXT=0.1 µF
RL=10 kΩ, CL=1 0pF
20 µs
6 ms
tOFF-MIC
Switch Turn-Off Time (MIC
Switch), Measure 10/90
3.8 RL=10 kΩ, CL=10 pF
100 ns
tON-DET
tOFF-DET
Detection Circuit NMOS On time 2.7 to 4.4
Detection Circuit NMOS OFF time 2.7 to 4.4
20 µs
20 µs
tDET
Detection Time of Audio Jack
GND and MIC Terminals(6)
2.7 to 4.4 EN=1
50 ms
tEN Enable / Disable Time
2.7 to 4.4 EN=01, EN=10
15 µs
Power
Power Supply Noise
PSRR
Power Supply Rejection Ratio(5)
3.8
300mVPP, Measured
10/90%, f=217 Hz Square
-89
dB
Wave
Notes:
5. Guaranteed by characterization.
6. Detection time may be longer if there is noise in the system or a poor audio jack connection.
© 2011 Fairchild Semiconductor Corporation
FSA8049 • Rev. 1.0.2
5
www.fairchildsemi.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet FSA8049.PDF ] | |
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