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ACS522D01AHGYYX Datasheet(PDF) 8 Page - Integrated Device Technology |
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ACS522D01AHGYYX Datasheet(HTML) 8 Page - Integrated Device Technology |
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8 / 72 page  8 V1.0 1/12 ©2011 INTEGRATED DEVICE TECHNOLOGY, INC. ACS522D01 ACS522D01 LOW-POWER, HIGH-FIDELITY, INTEGRATED CODEC The digital audio data is converted to oversampled bit streams using 24-bit digital interpolation filters, which then enters sigma-delta DACs, and become converted to high quality analog audio signals. To enhance the sound available from the small, low-power speakers typically found in a portable device, the ACS522D01 provides numerous audio enhancement capabilities. The ACS522D01 features dual, independent, pro- grammable left/right 6-band equalization, allowing the system designer to provide an advanced system equalizer to accommodate the specific speakers and enclosure design. A compressor/limiter features programmable attack and release thresholds, enabling the system designer to attenuate loud noise excursions to avoid speaker artifacts, thus allowing the underlying content to be played at a louder volume without distortion. For compressed audio, a program- mable expander is available to help restore the dynamic range of the original content. A stereo depth enhancement algorithm allows common left/right content (e.g. dialog) to be attenuated separately from other content, providing a per- ceived depth separation between background and foreground audio. Psychoacoustic bass and treble enhancement algorithms achieve a rich, full tone even from originally compressed content, and even with speakers generally unable to play low-frequency sounds. 1.3. Audio Inputs On the analog input side, the device features multiple line-in/microphone inputs, which can be used for analog micro- phone, or line-in inputs. In addition, digital microphones are also supported. The device provides input gain control, separate volume controls, automatic leveling capability, and programmable microphone boost to smooth input record- ing. A programmable silence “floor” or “threshold” can be set to minimize background noise. |
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