STA321MP:Scalable digital microphone processor

The STA321MP 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.

Key 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
产品规格
DescriptionVersionSize
DS8825: Scalable digital microphone processor6.01 MB
应用手册
DescriptionVersionSize
AN3984: IIR filter design equations for Sound Terminal® devices1.1493 KB
AN3340: Loudspeaker characterization and compensation1.33 MB
AN4146: STSmartVoice demonstration board STEVAL-MKI126Vx2.03 MB
手册
DescriptionVersionSize
ST’s solutions for mobile devices3.23 MB
Product Evaluation Tools
型号制造商Description
STEVAL-MKI126V2MEMS microphone evaluation board based on STA321MPL and MP34DB01 (microphone processor + digital uPhone MEMS)
样片和购买
型号PackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STA321MPLLQFP 64 10x10x1.4Tray-4090--NECEAR99-
STA321MPLTRLQFP 64 10x10x1.4Tape And Reel-40903.5511000NECEAR99MALAYSIA
STA321MPTRVFQFPN 59 8x8x0.9Tape And Reel-4090--NECEAR99-
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
STA321MPLLQFP 64 10x10x1.4IndustrialEcopack1
STA321MPLTRLQFP 64 10x10x1.4IndustrialEcopack1
STA321MPTRVFQFPN 59 8x8x0.9IndustrialEcopack3
Scalable digital microphone processor STA321MP
IIR filter design equations for Sound Terminal® devices STA321MP
Loudspeaker characterization and compensation APWORKBENCH
STSmartVoice demonstration board STEVAL-MKI126Vx STEVAL-MKI126V1
1.2 megapixel high dynamic range image sensor VD8640