The device also features a differential microphone
input, variable gain control stages, and an integrated 1 W speaker driver.
The 5173 is designed to operate seamlessly with the THAT1570 high performance current-feedback amplifier, THAT's state-of-the-art analog differential microphone
The WM8956 supports differential microphone
and line inputs specifically for baseband processors in mobile phones as well as offering a flexible analog mixer for stereo and mono inputs and outputs for other applications.
The WM8985 supports up to two differential microphone
and analogue stereo line inputs, enabling direct mixing from an FM radio, and has two pair of headphone drivers enabling two users on one audio player.
The features built into this design, including the patented first-order differential microphone
technology from Bell Labs, make the sound quality of this product tough to beat," said Bill Porter, general manager of IAS.