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Features• Analog microphone array expansion for STWIN (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
DescriptionThe STEVAL-STWINMAV1 microphone array expansion adds advanced audiosensing capabilities to the 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) MP23ABS1capacitive sensing microphones, supported by a very low drop voltage, low quiescentcurrent and low-noise voltage regulator ideal for batter-powered applications such asSTWIN.
The expansion board is connected via a dedicated 12-pin connector to the coresystem board, which runs the STSW-STWINKT01 firmware with dedicated BSPdrivers and application examples for you to test and develop vibration monitoring inthe ultrasound frequency ranges.Product summary
Analog microphonearray expansion forSTWIN kit
STEVAL-STWINMAV1
MEMS analog bottom-port microphone MP23ABS1
STWIN SensorTileWireless IndustrialNode development kit
STEVAL-STWINKT1
Firmware for STEVAL-STWINKT1 evaluationkit
STSW-STWINKT01
Analog microphone array expansion for the SensorTile Wireless Industrial Node (STWIN) kit
STEVAL-STWINMAV1
Data brief
DB3970 - Rev 1 - July 2019For further information contact your local STMicroelectronics sales office.
www.st.com
https://www.st.com/en/product/steval-stwinmav1https://www.st.com/en/product/steval-stwinkt1https://www.st.com/en/product/mp23abs1https://www.st.com/en/product/stsw-stwinkt01https://www.st.com/en/product/steval-stwinmav1https://www.st.com/en/product/steval-stwinmav1https://www.st.com/en/product/mp23abs1https://www.st.com/en/product/steval-stwinkt1https://www.st.com/en/product/steval-stwinkt1https://www.st.com/en/product/stsw-stwinkt01https://www.st.com/en/product/stsw-stwinkt01
1 Schematic diagrams
Figure 1. STEVAL-STWINMAV1 schematic - Mics, VDD and connector
2
SB2
C27
a4
a1
110kSB3
SAI_SCK
A3V
GN
D1
NC
2 4G
ND
34
0R
3V3
b3
IN1
A3V
MP23ABS11
SB1
GN
D1
2
100nF
23G
ND
2
100nF
R7
M3C24 C25
A3V
a3
SB4
GN
D3
3
39k1uF
DOUT DOUT
C21
C26
5VDD
b1
M55-7001242R
GN
D1
0R
5VDD
100nF
SAI_SD
b2
1uF
A3VM1
A3V
M4MP23ABS1
1
1uF
1uF
1uF
M2
GN
D2
a2
C28
1uF
LDK130M-R
M4
2G
ND
b6
GN
D1
3
SAI_MCLK
C20
4G
ND
3
a6
M2
A3V
3V3 U2
C29
DOUT
VDD5
4
MP23ABS11
5VDD
GN
D2
b5
R6
M3
4G
ND
3
100nF
D3V3
SAI_FS
EN3
3G
ND
2C23C22
Analog VDD
Analog Mics
Connector
3.3 to 5.5 V
MP23ABS11
ADJ/BYPOUT
5
b4a5
VIN
CN1
M1
VIN
3V3
I2C_SDAI2C_SCL
DOUT
NCSB5 0R
DB
3970 - Rev 1
page 2/5
STEVAL-STW
INM
AV1
Schematic diagram
s
Figure 2. STEVAL-STWINMAV1 schematic - ADC
ADC
D3V3
D3V3
D3V3
A3V
A3V
SAI_MCLK
SAI_SDSAI_FSSAI_SCKI2C_SDAI2C_SCL
M1
M3
M2
M4
R14.87k
C15
R3
U1
ADAU1978AGND11
VREF2
PLL_FILT3
AVDD24
AGND25
PD_RST6
MCLKIN7
IOVD
D12
SDAT
AOU
T113
SDAT
AOU
T214
LRC
LK15
BCLK
16
AGND321
ADD
R1_
CIN
20
AGND422NC223
NC526NC627AGND528AGND629NC730
SDA_
CO
UT
17
NC18
SA_MODE9
DVDD10
DG
ND
11
SCL_
CC
LK18
ADD
R0_
CLA
TCH
19
NC324NC425
AVD
D3
31AI
N1N
32AI
N1P
33AI
N2N
34AI
N2P
35AI
N3N
36AI
N3P
37AI
N4N
38AI
N4P
39AV
DD
140
E41
C13
100nF
C17 C2
C7
10uF
C1
39nF
C6
C12
C8
2200pF
C18
100nF
C11
R4
R2
3k
C10C4
C14
10uF
R5
Place close to AVDD1, AVDD2, AVDD3 pins
Place close to IOVDD
D3V3
A3V
C16
100nF
C9
100nF
C19
10uF
C5
100nF
C3
100nF
100nF
100nF 100nF
100nF
100nF
100nF
100nF100nF
47k
47k47k
DB
3970 - Rev 1
page 3/5
STEVAL-STW
INM
AV1
Schematic diagram
s
Revision history
Table 1. Document revision history
Date Version Changes
08-Jul-2019 1 Initial release.
STEVAL-STWINMAV1
DB3970 - Rev 1 page 4/5
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© 2019 STMicroelectronics – All rights reserved
STEVAL-STWINMAV1
DB3970 - Rev 1 page 5/5
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Cover imageProduct summaryFeaturesDescription1 Schematic diagramsRevision history