STA321MPL1 Datasheet, PDF (1/80 Pages) STMicroelectronics – Scalable digital microphone processor

STA321MPL1
Scalable digital microphone processor
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Features
• 8 digital processing channels each 24-bits
– 6 channels of PDM input
– 2 additional virtual channels
• >100 dB SNR and dynamic range
• Digital gain/attenuation 58 dB to -100 dB in
0.5 dB steps
• Soft volume update
• Individual channel and master level control
• Up to 10 independent 32-bit user-
programmable biquads (EQ) per channel
• Bass/treble tone control
• Pre- and post-EQ full 8-channel input mix on all
8 channels
• Dual independent limiters/compressors
• Dynamic range compression or anti-clipping
modes
• Individual channel and master soft/hard mute
• 3 I²S data outputs
• I²S data output channel mapping function
• Independent channel volume and DSP bypass
• Channel mapping of any input to any
processing channel
Applications
• Tablets
• Gaming
• Audio conference sets
• Legacy microphone-equipped devices
Datasheet - production data
Description
The STA321MPL1 is a PDM, high-performance,
multichannel processor with ultra-low quiescent
current. It is designed for general-purpose digital
microphone applications. The device is fully
digital and is comprised of three main sections.
The first section is the PDM input interface which
can accept up to six serial digital inputs. The
second section is a high-quality audio processor
allowing flexible channel mixing/muxing and
provides up to 10 biquads for general sound
equalization and voice enhancement with
independent volume control. The last block is the
I²S output interface which streams out the
processed digital audio. The output interface can
also be programmed for flexible channel
mapping. The device offers some of the most
commonly required audio enhancements such as
programmable voice tuning and equalization,
limiter/compressor for improved voice quality,
multiband selection for customizable microphone
usage, and configurable wind-noise rejection. The
embedded digital processor allows the
microphone processing to be offloaded from the
main CPU or SoC to the device.
The STA321MPL1 has six digital microphone
inputs, providing connections for up to three dual-
membrane microphones.
Table 1. Device summary
Order code
Package
Packaging
STA321MPL1TR
TQFP64
Tape and reel
June 2016
This is information on a product in full production.
DocID029389 Rev 1
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