ST MICROELECTRONICS STEVAL-STWINMAV1 Datasheet
STEVAL-STWINMAV1
Data brief
Analog microphone array expansion for the SensorTile Wireless Industrial Node
(STWIN) kit
Features
Analog microphone array expansion for STEVAL-STWINKT1B (and STEVAL-
•
STWINKT1)
• Connects to STWIN core system board through dedicated 12-pin connector
• 3 V to 5.5 V power supply input
• 4 mm square-shaped differential microphone array
• 4x MP23ABS1 high-performance, single-ended, analog, bottom-port MEMS
microphones
• LDK130 300 mA low quiescent current very low noise LDO
• On-board audio-grade quad ADC
• Serial Audio Interface (SAI) digital output
Product summary
Analog microphone
array expansion for
STWIN kit
MEMS analog bottomport microphone
STWIN SensorTile
Wireless Industrial
Node development kit
and reference design
for industrial IoT
applications
Firmware for
STEV
AL-STWINKT1B
evaluation kit
Applications
STEVALSTWINMAV1
MP23ABS1
STEVALSTWINKT1B
STSWSTWINKT01
Factory
Automation
Sound Sensing
Description
The STEVAL-STWINMAV1 microphone array expansion adds advanced audio
sensing capabilities to the STEVAL-STWINKT1B (and STEVAL-STWINKT1)
SensorTile Wireless Industrial Node (STWIN) kit for high frequency vibration
monitoring applications.
The board includes four low-power, high signal-to-noise ratio (SNR) MP23ABS1
capacitive sensing microphones, supported by a very low drop voltage, low quiescent
current and low-noise voltage regulator ideal for batter-powered applications such as
STWIN.
The expansion board is connected via a dedicated 12-pin connector to the core
system board, which runs the STSW-STWINKT01 firmware with dedicated BSP
drivers and application examples for you to test and develop vibration monitoring
in the ultrasound frequency ranges.
DB3970 - Rev 2 - December 2020
For further information contact your local STMicroelectronics sales of
fice.
www.st.com
2
SB2
C27
a4
a1
110k
SB3
SAI_SCK
A3V
GND1
NC
2
4
GND3
4
0R
3V3
b3
IN
1
A3V
MP23ABS1
1
SB1
GND1
2
100nF
2
3
GND2
100nF
R7
M3
C24 C25
A3V
a3
SB4
GND3
3
39k
1uF
DOUT DOUT
C21
C26
5
VDD
b1
M55-7001242R
GND1
0R
5
VDD
100nF
SAI_SD
b2
1uF
A3V
M1
A3V
M4
MP23ABS1
1
1uF
1uF
1uF
M2
GND2
a2
C28
1uF
LDK130M-R
M4
2
GND
b6
GND1
3
SAI_MCLK
C20
4
GND3
a6
M2
A3V
3V3
U2
C29
DOUT
VDD
5
4
MP23ABS1
1
5
VDD
GND2
b5
R6
M3
4
GND3
100nF
D3V3
SAI_FS
EN
3
3
GND2
C23C22
Analog VDD
Analog Mics
Connector
3.3 to 5.5 V
MP23ABS1
1
ADJ/BYP
OUT
5
b4
a5
VIN
CN1
M1
VIN
3V3
I2C_SDA
I2C_SCL
DOUT
NC
SB5 0R
DB3970 - Rev 2
1 Schematic diagrams
Figure 1. STEVAL-STWINMAV1 schematic - Mics, VDD and connector
page 2/5
STEVAL-STWINMAV1
Schematic diagrams
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