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

IMPORTANT NOTICE – PLEASE READ CAREFULLY

STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to STproducts and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. STproducts are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.

Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design ofPurchasers’ products.

No license, express or implied, to any intellectual property right is granted by ST herein.

Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.

ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other product or servicenames are the property of their respective owners.

Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

© 2019 STMicroelectronics – All rights reserved

STEVAL-STWINMAV1

DB3970 - Rev 1 page 5/5

http://www.st.com/trademarks

Cover imageProduct summaryFeaturesDescription1 Schematic diagramsRevision history