Datasheet Texas Instruments TS3A226AEYFFR — Ficha de datos

TS3A226AE
www.ti.com SCDS346A – JUNE 2013 – REVISED JULY 2013 Autonomous Audio Headset Switch with Reduced GND Switch RON and FM Capability
Check for Samples: TS3A226AE FEATURES DESCRIPTION The TS3A226AE is an audio headset switch that
detects 3-or 4-pole 3.5mm accessories. For a 4-pole
accessory with a microphone, the TS3A226AE also
detects the MIC location and routes the microphone
and ground signals automatically. The ground signal
is routed through a pair of low-impedance ground
FETs (60mΩ typical), resulting minimal impact on
audio cross-talk performance. The autonomous
detection feature allows end users to plug in
accessories with different audio pole configurations
into the mobile device and have them operate
properly with no added software control and
complexity. The ground FETs of the device are
designed to allow FM signal pass-through, making it
possible to use the ground line of the headset as an
FM antenna in mobile audio application. 1 Ground FET Switches (60mО© typical)
Autonomous Detection of Headset Types:
3-Poles or 4-Poles (with MIC on SLEEVE or
RING2)
Microphone Line Switches
Supports FM Signal Transmission Through the …