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SparkFun has launched a compact breakout board designed to make it simpler to get audio into your tasks, combining a MEMS microphone and an op-amp for direct connection to a microcontroller.
“The SparkFun Analog MEMS Microphone Breakout makes it straightforward to work with the SPH8878LR5H-1 analog microphone from Knowles,” the corporate explains of its newest creation. “This board options an op-amp to carry the output of the microphone to a usable degree, permitting you to plug instantly into an ADC [Analog to Digital Converter] on a microcontroller or one thing just like the SparkFun Spectrum Defend.”
SparkFun has launched a brand new analog microphone breakout, based mostly on a Knowles MEMS mic. (📷: SparkFun)
The op-amp is not simply there to amplify the sign from the microphone, although: It additionally provides a bias voltage equal to half VCC. “With sound sources similar to a standard talking voice just a few toes away from the microphone,” the corporate notes, “the AUD output sign can be at about 200mV peak-to-peak.”
The board is designed to function at voltages of two.3-3.6V, and with a mean present consumption claimed at 265µA. The microphone gives a frequency vary of 7Hz to 36kHz, a 66dBV/Pa signal-to-noise ratio, and a 44dBV/Pa sensitivity.
The board contains an op-amp, appropriate for connection on to a microcontroller’s ADC. (📷: SparkFun)
It is not SparkFun’s first MEMS microphone breakout, although: The corporate had launched two different variants previously, one based mostly on the Analog ADMP401 and the opposite on the InvenSense ICS-40180. The brand new mannequin, the corporate guarantees, needs to be a pin-compatible drop-in alternative.
Extra particulars can be found within the hookup information, together with pattern code; the breakout board itself can now be ordered from the SparkFun retailer at $6.95 earlier than quantity reductions.
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