Digital Microphones

Integration is a primary advantage offered by the MEMS microphone revolution. InvenSense’s digital MEMS microphones capitalize on this advantage by joining high-performance MEMS elements with state-of-the art wide dynamic range CMOS technology – a perfect combination.

The first wave of digital microphones has used a PDM (Pulse Density Modulated) digital output. These microphones integrate the ADC, and output an undecimated 1-bit stream. PDM is an ideal interface to consider when you have a codec readily available and require multiple microphones, or have a substantial distance between the microphones and the codec.

InvenSense is now leading the way toward the next family of digital microphones with fully decimated outputs capable of being connected directly into microcontrollers and DSPs. I²S output microphones, such as the ICS-43432 and the INMP441, are ideal when a codec is not needed.

Recommended Products

Part # Market Status Output Port Location SNR AOP Sensitivity Package Size
UNITS: dBA dB SPL dbfs (mm)
ICS-52000
ICS-52000
Production TDM Bottom 65 116 -26 4 x 3 x 1
ICS-51360
ICS-51360
Production PDM Bottom 62 130 -36 3.5 x 2.65 x 0.98
ICS-41350
ICS-41350
Production PDM Bottom 64 120 -26 3.5 x 2.65 x 0.98
ICS-41351
ICS-41351
Production N/A Top 65 120 -26 3.5 x 2.65 x 0.98
ICS-41352
ICS-41352
Production PDM Bottom 64 120 -26 3.5 x 2.65 x 0.98
ICS-43434
ICS-43434
Production I²S Bottom 65 120 -26 3.5 x 2.65 x 0.98
ICS-43432
ICS-43432
Production I²S Bottom 65 116 -26 4 x 3 x 1
INMP621
INMP621
Production PDM Bottom 65 133 -46 3 x 4 x 1
INMP522
INMP522
Production PDM Bottom 65 116 -26 3 x 4 x 1
INMP521
INMP521
Production PDM Bottom 65 120 -26 3 x 4 x 1

Not Recommended for New Designs

Part # Market Status Output Port Location SNR AOP Sensitivity Package Size
UNITS: dBA dB SPL dbfs (mm)
INMP441
INMP441
NR/ND I²S Bottom 61 120 -26 4.72 x 3.76 x 1
INMP421
INMP421
NR/ND PDM Bottom 61 120 -26 3 x 4 x 1
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