STEVAL-MKI155V1 STMicroelectronics

S T E VA L - M K I 1 5 5 V 1 Microphone coupon board based on the MP45DT02-M digital MEMS microphone Data brief Description The STEVAL-MKI155V1 board is a daughterboard to be used with the STEVAL- MKI126Vx (Smart Voice) kit, containing 4 MP45DT02-M digital MEMS microphones. The coupon concept allows easy performance testing of ST MEMS microphones. When connected to the Smart Voice board, it is possible to detach the single PCBs hosting each microphone. Features 4 x MP45DT02-M top port digital MEMS microphones Functions as a daughterboard for use with STEVAL-MKI126Vx kit V supply from 1.64 to 3.6 V 120 dBSPL acoustic overload point Omnidirectional sensitivity PDM single-bit output 61 dB of SNR Sensitivity -26 dBFS RoHS compliant February 2015 DocID026991 Rev 2 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-MKI155V1 1 Schematic diagram Figure 1: STEVAL-MKI155V1 circuit schematic 1 6 GND VDD DATA VDD 1 1 2 5 LR DOUT GND LR 2 C1 C2 2 3 4 10uF GND CLK CLK 100nF 3 3 U1 J1 J2 MP45DT02-M GSPG01102014DI1545 2/4 DocID026991 Rev 2