FSA850: Audio 3-Pole / 4-Pole MIC-GND Switch

The FSA850 is a 3-pole or 4-pole audio jack microphone GND switch for accessories with General-Purpose Input / Output (GPIO) control signals. The FSA850 also has the ability to perform 4-pole cross-point switching to support Open Mobile Terminal Platform (OMTP) 4-pole headset plugs. The architecture is designed to replace discrete MOSFET solutions and allow common third-party headphones to be used for listening to music or playing video from mobile handsets, personal media players, and portable peripheral devices.

Features

• Switch Type: 3-Pole/4-Pole MIC - GND
• V_CC: 2.3 to 4.5 V
• THD (MIC): 0.001% Typical
• ESD:
  • IEC 61000-4-2 (Air Gap): 15 kV
  • IEC 61000-4-2 (Contact): 8 kV
  • HBM (All Pins): 3 kV
  • GNDnA/GNDnB to GND: 8 kV
  • Power to GND: 10 kV
  • CDM: 2 kV
• IEC 61000-4-2 (Air Gap): 15 kV
• IEC 61000-4-2 (Contact): 8 kV
• HBM (All Pins): 3 kV
• GNDnA/GNDnB to GND: 8 kV
• Power to GND: 10 kV
• CDM: 2 kV
• Operating Temperature: -40°C to 85°C
• R_ON Maximum (GND1n): 0.08 Ω
• R_ON Maximum (Sense): 1 Ω