Texas Instruments Audio Accessory Detection & Configuration Switch
Texas Instruments TS3A227E Audio Accessory Detection & Configuration Switch 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 RON of 60mΩ 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.
Features
- Supply range of 2.5V to 4.5V
- 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 ring
- Key press detection for up to 4 keys
- Ultra low ground FET RON of 60mΩ
- 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
Applications
- Mobile phones
- Tablets
- Notebooks and ultrabooks
- Anywhere a 3.5mm audio jack is used
Simplified Schematic
Publicado: 2015-01-27
| Actualizado: 2022-03-11