Knowles KAS-33100-0004 MUSKIE User Manual

USERS GUIDE

KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT

Figure 1: KC10143 Muskie Assembly

KIT DESCRIPTION

The KAS-33100-0004 Muskie microphone evaluation kit allows for

simple and easy evaluation of Knowles SiSonic™ MEMS microphones.

• Evaluate two input channels of audio from multiple MEMS

microphone types.

• Microphone types include single and differential Analog

MEMS microphones, Digital PDM MEMS microphones, and

Digital I2S MEMS microphones.

• Wide dynamic range (varies with microphone types and audio path).

• Selectable Clock Frequencies, Voltages, and Gains.

• Multiple Audio Outputs – XLR, 3.5mm Headset Jack, USB

Audio.

SIMPLE QUICK START

1. Place suitable microphone assembly correctly into socket.

2. Select audio path and audio signal level.

3. Select Mic voltage and digital clock (if applicable).

4. Connect desired output (XLR, Headset, or USB).

5. Connect USB Cable and turn Power On.

KIT CONTENTS

•

KC10143-xxx Muskie Evaluation Board (Note: xxx denotes assembly revision number)

•

USB A to USB Micro cable power cable

•

KCA2733 Flex Adapter Assembly (3 Total)

Note: The evaluation kit requires assembled MEMS microphones. Usable assemblies include microphones mounted to “flex” circuit cards or coupon boards. The kit does NOT include assembled Knowles MEMS microphones. Microphone assemblies are available separately from a Knowles distributer.

Figure 2: Mic on Flex Assembly Example

For additional Muskie evaluation kit information, electrical documentation, or flex circuit assembly information visit the Knowles website. https://www.knowles.com/subdepartment/evaluation-kits/dpt-

microphones/subdpt-sisonic-surface-mount-mems.

The Muskie evaluation kit is for the evaluation of the Knowles Electronics’ line of MEMS microphones. In some instances the eval kit may limit overall microphone performance.

THE KITS’ INTENDED USE IS TO SUPPORT R&D ACTIVITIES, AND IS NOT INTENDED FOR QUALIFICATION OR PRODUCTION TEST USE.

SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LLC.

knowles.com | KAS-33100-0004 Muskie Microphone Evaluation Kit

KNOWLES – KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT USERS GUIDE

BLOCK DIAGRAM

POWER SUPPLIES

Dig

Mic1

Dig

Mic2

I2S

Mic1

I2S

Mic2

USB

Micro B

MicVDD

I2S Data

LSCLK

PDM Data

Mic Clk

I2S Data

VBUS

Voltage Level

LSCLK

shifter

74AVC6T622

FILTVBUS

Mic Clk

ADJ VDD

SELECTABLE

PDM -> I2S

Converter

Max

BW=37.5KHz

@4.8MHz

SData

AU7002

Select PDM

Select I2S

VDD

RT6150

800mA

LDK220

PDM Data

I2S Data

3.3v

1.8V

2.75V

3.3V

LRCLK

BCLK

Digital Data

Selector

74LVC157

3D3

Source Current

27MHz

XTAL

TPS65133

SCLK

LRCLK

BCLK

SDIN

CURRENT

0.0

MK2705

AUDIO CLK

SOURCE

19.2MHz XTAL

192KHz

24bit D/A

PCM1794

SENSE

+5VA

-5VA

OPA1632

MicVDD

CLOCK

GENERATOR

Base Clock

Freq Sel

MCLK

74LVC157

CLK DIVIDER

CIRCUITS

FREQ SELEC T

JUMPER

Ana/Dig Selector

LOUT+

LOUT-

BCLK

LRCLK

SCLK

RST

ANA Mic1

ANA Mic2

MicVDD

Single/Diff

Selector

Single/Diff

Selector

LOUT+

LOUT-

LT6232

+19db

Selectable Attenuation 0dB, -4dB, -15dB, -19dB

OPA1632

Selectable Attenuation

0dB, -4dB, -15dB, -19dB

USB CODEC

PCM2900CDB

BW = 48KHz

MAX9722A

+0db

LT6232

Figure 3: KC10143 Muskie Board Block Diagram

Left Diff

Audio

Right Diff

Audio

USB Micro B

Connector

USB

Audio

Headset

Jack

ROUT-

knowles.com | KNOWLES – KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT USERS GUIDE

2 SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LLC.

KNOWLES – KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT USERS GUIDE

Analog M ic

Type

Selectors

Analog/Digital

Mic Type Select ors

Right Channel

Audio Output

Left Channel

Audio Output

Headset Jack

Audio Output

Analog

Mic1

Analog

Mic1

Digital

Mic1

Digital

Mic2

Digital

MIC

Select or

8899

18 18

I2S Mic2I2S Mic1

Dual Mic

Test

Jumpers

MIC

Current

Adjustable

VDD

Select or

Power

Switch

Audio Gain

Selectors

Figure 4: KC10143 Muskie Functional Description

Digital M ics

Clock Frequen cy

Selector

FUNCTIONAL DESCRIPTION

Main Power Switch

Slide switch. When placed in the ON position will enable the internal voltage regulators and support circuitry. If all internal supplies power up correctly the POWER GOOD LED will turn on.

USB connector for main power.

USB Micro B connector. Source power for Muskie board. Knowles recommends using a USB based battery similar to Insignia model # MB5202B for supplying clean power to kit.

Microphone VDD Selector

Slide switch allows microphone voltage selection. Supports common microphone voltages, +3.3V, +2.75V, and +1.8V. The ADJ selection generates unique VDD voltages.

Adjustable VDD

Setting the VDD SELECTOR to ADJ enables the VDD-ADJ

3 SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LLC.

knowles.com | KNOWLES – KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT USERS GUIDE

USB Micro B

Audio

Connector

potentiometer to generate a custom VDD voltage. The adjustable voltage range is from ~+1.6V to ~+3.65V. Refer to microphone specifications for acceptable input voltages.

MIC Current Jacks

Banana jack compatible, for measuring current using an external current meter. Note: remove jumper labeled BYPASS to enable.

Digital MIC Selector

Sets signal path for digital microphones. Select between PDM digital and I2S digital.

USB Micro B

Power

Connector

KNOWLES – KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT USERS GUIDE

I2S Digital Mic Connector

The socket connector can accommodate a maximum of two coupons. Orient the flex adapter board (KCA2733) to align the “P O G” markings with the “P O G” markings on the Muskie board.

PDM Digital Mic Connector

The socket connector can accommodate a maximum of two coupons. Orient the flex adapter board (KCA2733) to align the “P O G” markings with the “P O G” markings on the Muskie board.

Analog Mic Connector

The socket connector can accommodate a maximum of two coupons. Orient the flex adapter board (KCA2733) to align the “P O G” markings with the “P O G” markings on the Muskie board.

10.

Analog Mic Type Selection Jumper

Select between Analog Differential Mic and Analog Single ended Mic. Left jumper is selector for ANA1 connector socket. Right jumper is selector for ANA2 connector socket.

11.

Analog/Digital Mic Type Selector

Select independently left and right channels between analog or digital microphone paths.

12.

Right Channel Audio Output

Right channel differential analog audio output. Audio is output thru a male XLR connector with the following pinouts. Pin 1 – GND Pin 2 – Right channel positive audio signal Pin 3 – Right channel negative audio signal

13.

Left Channel Audio Output

Left channel differential analog audio output. Audio is output thru a male XLR connector with the following pinouts. Pin 1 – GND Pin 2 – Left channel positive audio signal Pin 3 – Left channel negative audio signal

14.

Headset Audio Output Jack

3.5mm standard analog headset jack passing stereo audio.

15.

Audio Level Selectors

Independent left and right channel gain/attenuation settings.

16.

Digital Mics Clock Frequency Selector

PDM/I2S system clock generator. Select between nine useable digital microphone frequencies. 768KHz

1.024MHz

1.536MHz

2.048MHz

2.4MHz

2.822MHz

3.072MHz

4.096MHz

4.8MHz NONE – Disables the clock generator circuit.

17.

USB Audio Connector

USB Micro B connector for steaming USB audio to a PC. The Muskie board uses a generic Windows 7 USB audio driver. No external software driver installation nessessary. When connected and powered the device will appear as an USB Audio Codec under the Recording tab of the Sound window.

Figure 5: PC Sound Window

18.

Dual Mic Test Jumpers

PDM2 and I2S2 sockets VDD pin can be set to VDD or GND, independent of PDM1 or I2S1 sockets. Used for stereo Mic VDD testing.

knowles.com | KNOWLES – KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT USERS GUIDE

4 SiSonic, Knowles and the logo are trademarks of Knowles Electronics, LLC.

+ 8 hidden pages

Knowles KAS-33100-0004 MUSKIE User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual