Date: 18/06/2012

TI’s detection and configuration switch IC automatically detects headset type

Texas Instruments Incorporated (TI) has introduced a new audio headset detection and configuration switch integrated circuit (IC) TS3A225E that enables universal headset support for audio applications in a single chip. By integrating the automatic detection and switching function in a single device, the TS3A225E eliminates detection, leakage and click-pop issues caused by using discrete components in end-equipment, such as smartphones, tablets, laptops, audio docks and home audio applications.

The TS3A225E has extended the functionality of TI audio codecs, such as TLV320AIC3262 and TLV320AIC3212. For the 2x2 crosspoint switch functionality without headset-type detection, TI offers the TS3A26746E.

Key features:
1. Supports three-prong (without microphone) and four-prong (with microphone) audio headsets from all manufacturers
2. Detects the configuration of the microphone and ground pins on a four-prong headset and routes them appropriately via a 2x2 crosspoint switch
3. Reports headset information over I2C interface
4. On-resistance: 100 mOhms for the ground switch
5. Available in both QFN and WCSP 16-pin packages

The chip is available now at a retail price of $0.32 in 1,000 unit quantities.