SiS3934

The SiS3934 is a bottom port digital MEMS microphone designed in a SMD compliant package of 3.50mm x 2.65mm x 0.98mm. Composed of a reliable and high performance MEMS acoustic sensor, and an ASIC with analog-to-digital converter and PDM modulator integrated, it offers great acoustic performance with 65dB Signal-to-noise ratio (SNR), a flat wideband frequency response, and -37dBFS sensitivity as well as no sensitivity loss across voltage. In addition, SiS3934 supports multi-operational modes, called normal mode and low power mode selected by clock frequency, suitable for applications demanding different power states vs performance levels.

The digital output interface supports the pulse density modulated (PDM) output for two digital MEMS microphone to be time-multiplexed on a shared bus of single data line using a single clock. In addition, SiS3934 operates from 1.62v to 3.6v and consumes power less than 350uA during low power mode.

  • Digital output Omni-directional microphone
  • Bottom Port SMD Compliant Package
  • Small form factor: 3.50mm x 2.65mm x 0.98mm
  • Sensitivity:
    • Normal Mode : -37dBA
    • Low Power Mode: -21dBA
  • Signal to Noise Ratio (SNR):
    • Normal Mode : 65dBA
    • Low Power Mode: 64dBA
  • Operating Voltage and no sensitivity loss across voltage: 1.62V~3.6V
  • Operating current:
    • Normal Mode : 850uA
    • Low Power Mode: 350uA
  • Shielding suppression of EMI