TS3A227E Datasheet, PDF (1/59 Pages) Texas Instruments – Autonomous Audio Accessory Detection and Configuration Switch

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TS3A227E
SCDS358B – NOVEMBER 2014 – REVISED FEBRUARY 2015
TS3A227E Autonomous Audio Accessory Detection and Configuration Switch
1 Features
•1 Supple Range of 2.5 V to 4.5 V
• Accessory Insertion/Removal Detection with
Adjustable De-bounce Timings
• Accessory Configuration Detection:
– Stereo 3-pole Headphone
– 4-pole Standard Headset with MIC on Sleeve
– 4-pole OMTP Headset with MIC on Ring2
• Key Press Detection for Up to 4 Keys
• Ultra Low Ground FET R_ON of 60 mΩ
• Power Off Noise Removal
• Isolation of MICBIAS From Audio Jack to Remove
Click/Pop Noise
• Integrated Codec Sense Line
• Manual I²C Control
• FM Transmission Capability
• Dual Small Package Options
– 16 Pin DSBGA
– 16 Pin QFN
2 Applications
• Mobile Phones
• Tablets
• Notebooks and Ultrabooks
• Anywhere a 3.5 mm Audio Jack is Used
3 Description
The TS3A227E is an autonomous audio accessory
detection and configuration switch that detects 3-pole
or 4-pole audio accessories and configures internal
switches to route the signals accordingly.
The internal ground FETS of the TS3A227E have an
ultra-low R_ON of 60 mΩ to minimize crosstalk impact.
The ground FETs are also designed to pass FM
signals, making it possible to use the ground line of
the accessory as an FM antenna in mobile audio
applications.
Internal isolation switches allow the TS3A227E to
remove the click/pop noise that can be generated
during and insertion or removal of an audio
accessory. In addition depletion FETs prevent a
floating ground while the device is unpowered,
removing the humming noise present when leaving
accessories plugged into an unpowered system.
A low-power sleep mode is provided which shuts
down internal circuitry to achieve very low quiescent
current draw when no headset is inserted.
The TS3A227E features integrated key press
detection for detecting up to 4 keys with press and
release support.
Manual I2C control allows the TS3A227E to adapt to
application needs by providing control over de-
bounce settings and switch states.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TS3A227E
QFN (16)
DSBGA (16)
3.50 mm × 3.50 mm
1.79 mm × 1.79 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
BATTERY
Audio Codec
Application
Processor
TS3A227E
LR G
L RGM
L RM G
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.