Audio Jack
FSA8069 — Audio Jack IC Featuring Impedance and Moisture Detection
February 2015
FSA8069
Audio Jack IC Featuring Imped...
Description
FSA8069 — Audio Jack IC Featuring Impedance and Moisture Detection
February 2015
FSA8069
Audio Jack IC Featuring Impedance and Moisture Detection
Features
Detection: - Accessory Plug-In - Send / End Key Press - Impedance Detection - Prevents False Detection due to Moisture
VDD: 3.0 V to 4.5 V VIO: 1.6 V to VDD THD (MIC): 0.01% Typical 15 kV Air Gap ESD Detects 7 Steps of Headset Impedance Integrates LDO for MIC Bias Circuit MIC Switch Removes Audio Jack “Pop” and “Click”
Caused by MIC Bias
Applications
Any Device with 3.5 mm and 2.5 mm Audio Jack Cellular Phones, Smart Phones, and Tablets MP3, GPS, and PMP
Processor
FSA8069
I2C / Control
Impedance / Moisture Detection
Power
MICBIAS
LDO
Audio Codec
+
-
Description
The FSA8069 is an audio jack detection switch for 3.5 mm and 2.5 mm headsets. The FSA8069 features impedance detection and moisture sensing, which prevents false detection of accessories in the audio jack. An integrated MIC switch allows a processor to configure attached accessories. An LDO provides DC bias to microphone and remote key circuit in accessory. The FSA8069 detects seven headset impedance steps and supports configurable gain in the amplifier according to the type of load. The architecture is designed to allow headphones to be used for listening to music from mobile handsets, personal media players, and portable peripheral devices.
Audio Jack
Figure 1. Block Diagram
Ordering Information
Part Number
Operating Temper...
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