Datasheet

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August 2012

FSA8049 • Rev. 1.0.2

FSA8049 — Audio Jack Detection and Configuration, MIC/GND Cross point Switch

FSA8049

Audio Jack Detection and Configuration, MIC / GND

Cross Point Switch

Features

Detection Audio Plug GND & MIC Polarity

2.5 to 4.4 V

THD (MIC) 0.002% Typical

ESD (IEC 61000-4-2)

(Air Gap)

15 kV

Operating Temperature -40°C to 85°C

Package

9-Ball WLCSP 3x3 Array, 0.4 mm

Terminal Pitch, 250 µm Ball

Top Mark M3

Ordering Information 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:

Analog.Switch@fairchildsemi.com

Typical Application

Figure 1. Mobile Phone Example

Oscillator &

Logic

100mΩ

MIC

GNDA

GND/MIC2

GND/MIC1

VDD

Detection

Switch Enable

Timing

CEXT

Audio Jack

LSPKR

RSPKR

3Pole

4Pole

To Audio Plug

Detection Circuit

Audio

Sub System

MIC Bias

MIC

Baseband

Processor

GPIO

MIC

5Ω

On/Off

Capacitor

GND

Summary of content (8 pages)

PAGE 1
FSA8049 Audio Jack Detection and Configuration, MIC / GND Cross Point Switch Features Description Detection Audio Plug GND & MIC Polarity VDD 2.5 to 4.4 V THD (MIC) 0.002% Typical ESD (IEC 61000-4-2) (Air Gap) 15 kV Operating Temperature -40°C to 85°C 9-Ball WLCSP 3x3 Array, 0.
PAGE 2
1 2 3 A VDD GNDA GND / MIC1 B MIC GNDA GND / MIC 2 C EN CEXT GND 3 2 1 GNDA VDD A GND/ MIC2 GNDA MIC B GND CEXT EN C GND// MIC1 M3 KK XYZ Pin Assignments , Top Through View Top Mark Side Pin Assignments Bottom View Bump Side 2 3 GND/ MIC1 GND/ MIC2 GND Top View 1 VDD GNDA GNDA CEXT MIC EN M3 KK X Y Z ● A B C = = = = = = FSA8049UCX Product Identifier Lot Run Trace Code Year Work Week Assembly Site (P= Penang, Malaysia) Pin 1 Indicator Bottom View Figure 2.
PAGE 3
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol v VSW Parameter Min. Max. Unit Supply Voltage from Battery -0.5 6.0 V VCC+0.5 Switch I/O Voltage -0.
PAGE 4
All typical values are at TA=25°C unless otherwise specified. Symbol Parameter VDD (V) Condition TA=-40 to +85°C Min. Typ. Max. 3.00 2.50 0.25 0.20 5.00 4.00 0.50 0.40 Unit MIC Switch (MIC to (GND/MIC1 or GND/MIC2)) RON(MIC) MIC Switch On Resistance RFLAT(ON) On Resistance Flatness VIN(MIC) CON(MIC) COFF(MIC) 2.8 3.8 2.8 3.8 IOUT=24 mA, VIN=1.8 V IOUT=24 mA, VIN=1 V to VDD 2.7 to 4.4 Switch Input Voltage Range 0 VDD Ω Ω V (3) 3.8 f=1 MHz 90 pF (3) 3.8 f=1 MHz 21 pF 2.8 3.
PAGE 5
All typical values are at TA=25°C unless otherwise specified. Symbol Parameter VDD (V) Condition TA = -40 to +85°C Min. Typ. Max. Unit MIC Switch THD OIRR (5) Total Harmonic Distortion Off Isolation 3.8 (5) 3.8 RT=600 Ω, VSW=0.5 VPP, f=20 Hz to 20 kHz, VIN=1.8 V and 2.2 V (Figure 4) 0.002 f=20 kHz, RS=32 Ω, CL=0 pF, RT=32 Ω (Figure 5) -108 f=20 KHz, RS=600 Ω, CL=0 pF, RT=600 Ω (Figure 5) -85 CEXT=Float RL=10 kΩ, CL=10 pF 200 µs CEXT=0.
PAGE 6
FSA8049 — Audio Jack Detection and Configuration, MIC/GND Cross point Switch Typical Performance Characteristics Figure 4. THD Test Setup Figure 5. © 2011 Fairchild Semiconductor Corporation FSA8049 • Rev. 1.0.2 Off Isolation www.fairchildsemi.
PAGE 7
FSA8049 — Audio Jack Detection and Configuration, MIC/GND Cross point Switch Physical Dimensions F 0.03 C A E 2X 0.40 B Ø0.20 Cu Pad A1 PIN A1 INDEX AREA 0.40 D Ø0.30 Solder Mask 0.03 C 2X LAND PATTERN RECOMMENDATION (NSMD PAD TYPE) TOP VIEW 0.06 C 0.05 C 0.625 0.547 C SEATING PLANE D 0.378±0.018 E 0.208±0.021 SIDE VIEWS NOTES: A. NO JEDEC REGISTRATION APPLIES. Ø0.260±0.020 9X 0.40 C. DIMENSIONS AND TOLERANCE PER ASMEY14.5M, 1994. C B A 0.40 B. DIMENSIONS ARE IN MILLIMETERS.
PAGE 8
FSA8049 — Audio Jack Detection and Configuration, MIC/GND Cross point Switch © 2011 Fairchild Semiconductor Corporation FSA8049 • Rev. 1.0.2 www.fairchildsemi.