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Zest_Sensor_Audio-PDM

Overview

The Zest_Sensor_Audio-PDM board is a development board for 6TRON platform based on two ICS-41350 PDM MEMS microphones from TDK InvenSense.

The ICS‐41350 is a low‐power, low‐noise digital MEMS microphone. It consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth‐order ΣΔ modulator. The pulse density modulated (PDM) interface allows two microphones to be time multiplexed on a data line using a single clock.

The ICS‑41350 has low power and high SNR in all operational modes. It has 126 dB SPL AOP in High Performance mode, and 120 dB SPL AOP in Standard and Low‐Power modes.

The Zest_Sensor_Audio-PDM can be used for audio acquisition in multiple application, like AI, predictive maintenance, sound level measurements, etc... with additional beam-forming capacity for SNR enhancement (Only on double connector Zest Core).

Zest_Sensor_Audio-PDM

Specifications

ICS-41350:

  • PDM Digital Output MEMS Microphone
  • Sensitivity: −26 ±1 dB FS
  • SNR: 64 dBA
  • AOP: 120 dB SPL
  • Current: 185-750 µA (Low - High Frequency)
  • Sleep current: 12 µA
  • Turn-ON time: 20 ms
  • Clock: 400kHz – 4.8MHz
FeatureDetails
Connectivity80-pin 6TRON header
Board size80 x 39 mm
Power Supply3.3 to 12V from stack, 1.8 V internal
CategoryZest_Sensor

Block Diagram

The graphics below gives an overview of the board features and connections.

Zest_Sensor_Audio-PDM

80-pin 6TRON header

This table shows how the pinout on Zest_Sensor_Audio-PDM corresponds to the pinout on the 6TRON BUS connector (the latter shown in the two middle columns).

Description6TRON functionPin numberPin number6TRON functionDescription
-VJACK12VJACK-
-VJACK34VJACK-
-VHV56VHV-
-VHV78VHV-
-DIO8910VIN_EN-
-DIO71112DIO9-
-DIO61314DIO10PDM data
-MD1516DIO11PDM clock
-DIO51718DIO12-
GroundGND1920GNDGround
GroundGND2122GNDGround
6TRON Stack Power SupplyVIN2324VIN6TRON Stack Power Supply
6TRON Stack Power SupplyVIN2526VIN6TRON Stack Power Supply
-VB_EN2728DIO13-
-VB_OUT2930DIO14PDM data (alternate)
-DAC13132DIO15-
-ADC43334DIO16-
-ADC33536DIO17-
-ADC23738DIO18-
PDM clock (alternate)ADC13940GND-
-EXT_NRST4142GND-
-DIO44344VREF-
-DIO34546DIO19-
-DIO24748DIO20-
-DIO14950DIO21-
-WKUP5152DIO22-
-ICAPT5354DIO23-
-PWM35556DIO24-
-PWM25758DIO25-
-PWM15960DIO26-
-SPI1_SS6162DIO27-
-SPI1_SCK6364DIO28-
-SPI1_MISO6566DIO29-
-SPI1_MOSI6768DIO30-
-UART1_TX6970DIO31-
-UART1_RX7172DIO32-
-I2C1_SDA7374DIO33-
-I2C1_SCL7576DIO34-
-CAN1_TX7778DIO35-
-CAN1_RX7980DIO36-

Software Support

The Zest_Sensor_Audio-PDM provides a demo example developed using Mbed OS. The board can run on the following Zest Core development boards:

Environmental impact

The Eco score of the Zest_Sensor_Audio-PDM is expressed in points representing the environmental impact of an average European per year.

Zest_Sensor_Audio-PDM

Zest_Sensor_Audio-PDM

Eco-score details

BOM

Componentdataunit
Passive electronic component0,034g
Active electronic component0,0085g
LED0,21g
Components(average)0,0116g
Connectors Switchs3,144g
Logique type integrated circuit0,3685g
Memory type integrated circuit0g
PCB840mm²

Consumption

Low voltage electricity voltage France
Current20mA
Supply voltage5V
Autonomy100h
% use75%
Power0,0075kWh

Ressources