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	LF Cutoff
UNITS:				dBA	dB SPL	dbfs	(mm)	Hz
T5808	Production	SoundWire	Bottom	66	135	-41	3.50 × 2.65 × 0.98	40
T5818	Production	PDM	Bottom	66	135	-41	3.50 × 2.65 × 0.98	40
ICS-52000	Production	TDM	Bottom	65	116	-26	4 x 3 x 1	50
ICS-51360	Production	PDM	Bottom	62	130	-36	3.5 x 2.65 x 0.98	50
ICS-41350	Production	PDM	Bottom	64	120	-26	3.5 x 2.65 x 0.98	50
ICS-41351	Production	PDM	Top	65	120	-26	3.5 × 2.65 × 0.98	50
ICS-41352	Production	PDM	Bottom	64	120	-26	3.5 x 2.65 x 0.98	60
ICS-43434	Production	I²S	Bottom	65	120	-26	3.5 x 2.65 x 0.98	60
ICS-43432	Production	I²S	Bottom	65	116	-26	4 x 3 x 1	50
T3902	Production	PDM	Bottom	64.5	120	-26	3.5 × 2.65 × 0.98	36
T3903	Production	PDM	Bottom	66	133	-37	3.5 × 2.65 × 0.98	40
T3904	Production	PDM	Bottom	66	135	-46	3.5 × 2.65 × 0.98	40
INMP621	Production	PDM	Bottom	65	133	-46	3 x 4 x 1	45
INMP522	Production	PDM	Bottom	65	116	-26	3 x 4 x 1	75
INMP521	Production	PDM	Bottom	65	120	-26	3 x 4 x 1	100