STEVAL-MKI139V4 STMicroelectronics

STEVAL-MKI139V4 Microphone coupon board based on the MP23AB01DM analog MEMS microphone Data brief Description The STEVAL-MKI139V4 board contains four MP23AB01DM analog MEMS microphones. The coupon design allows easy performance testing of STM MEMS microphones, with the possibility of detaching the single PCBs hosting each microphone. Features 4xMP23AB01DM bottom port analog MEMS microphones Vsupply from 2.3 to 3.6 V 135 dBSPL acoustic overload point Omnidirectional sensitivity Frequency range 100 Hz - 10 kHz 65 dB of SNR Sensitivity -38 dBFV 1 dBV THD < 0.5% 94 dBSPL, 1 kHz THD < 4% 130 dBSPL, 1 kHz RoHS compliant May 2017 DocID030364 Rev 2 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagrams STEVAL-MKI139V4 1 Schematic diagrams Figure 1: STEVAL-MKI139V4 coupon circuit schematic VDD U1 VDD 1 4 VDD GND C3 C1 C2 OUT- 2 3 OUT+ 270pF 100nF 1F OUT- OUT+ GND1 MP23AB01DM GND1 J1 OUT- 4 3 4 3 5 2 5 2 OUT+ 6 1 6 1 VDD CON6 GND1 GND1 Figure 2: STEVAL-MKI139V4 example of external electrical connections 2/4 DocID030364 Rev 2 OUT- OUT+