Description
AS3501 AS3502 Data Sheet Low Power Ambient Noise-Cancelling Speaker Driver 1 General .
The AS3501/02 are speaker driver with Ambient Noise Cancelling function for headsets, headphones or ear pieces.
Features
* Microphone Input 128 gain steps @0.375dB and MUTE with AGC
differential, low noise microphone amplifier
single ended or differential mode
supply for electret microphone
MIC gain OTP programmable
High Efficiency Headphone Amplifier 2x34mW, 0.1% THD @ 16Ω, 1.5V supply, 100dB SNR
bridged mode for e. g.
Applications
* Ear pieces, Headsets, Hands-Free Kits, Mobile Phones, Voice Communicating Devices
www. austriamicrosystems. com
Revision 1.13
1 - 45
AS3501 AS3502 1v2
Data Sheet
Figure 1. AS3501 Feed Forward ANC Block Diagram
Figure 2. AS3502 Feed-Back Block Diagram
www. austriamicrosystems. com
Revision 1.13
2