KAmodMIC MEMS: Difference between revisions

Revision as of 07:16, 10 August 2018

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Description

KAmodMIC_MEMS is a module with microphone SPV1840LR5H-B type. Thanks to embedded amplifier with hundredfold amplification of signal, output voltage can be measurement with using e.g. ADC converter in microcontroller. Module can be used by noise sensor or monophonic VU-meter as well.

Basic features and parameters

Microphone SPV1840LR5H-B type (MEMS)
Embedded LMV321L amplifier from STMicroelectronics
Rail-to-rail amplifier type with hundredfold amplification of signal from microphone
Power supply voltage: 2.7V - 5V
Output voltage of module in silence is equal to a half of power supply voltage
Embedded low-pass filter with cutoff frequency 10.6kHz
Place for soldering of pin header
Mounting holes 3mm
Module size (without connector): 22.5mm x 9.3mm x 3mm

Standard equipment

Code	Description
KAmodMIC_MEMS	Assembled and launched module 3-Pin header (male and angle) for own soldering

Electrical schematic

Outputs description

	JP1	Function
	VCC	Module power supply
	GND	Ground of power supply / signal
	OUT	Signal output

Signal output

KAmodMIC MEMS module has embedded amplifier, which can increase the signal from MEMS microphone hundredfold. Constant value of amplifier is a half of power supply voltage and signal amplitude depends on noise level in environment. On photo below is shown examples sinusoidal sound, which was received with using KAmodMIC MEMS (power supply 3.3V).

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 ====== Description ======
 [https://kamami.pl/kamod-kamami/557957-kamodmicmems-modul-mikrofonu-mems-ze-wzmacniaczem-lmv321l.html KAmodMIC_MEMS] is a module with microphone SPV1840LR5H-B type. Thanks to embedded amplifier with hundredfold amplification of signal, output voltage can be measurement with using e.g. ADC converter in microcontroller. Module can be used by noise sensor or  monophonic VU-meter as well.