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Vesper reserves the right to alter the datasheet specifications

without notification. Vesper assumes no liability for the use of

engineering samples and offers no warranty for this product.

Page 1 of 21

info@vespermems.com

Document Name: VM3011_Datasheet

Revision: U0.0.8

VM3011

Low-Noise PDM Digital Piezoelectric MEMS Microphone with

Adaptive ZeroPower Listening

PRELIMINARY DATASHEET

GENERAL DESCRIPTION

The VM3011 is a high performance, low noise digital MEMS

microphone. It features Vesper’s Adaptive ZeroPower

Listening

that dramatically extends the battery life of always-

on, always listening systems. Adaptive Intelligence constantly

monitors the ambient level to activate the system only when a

sound is detected above the background noise level. The entire

signal chain of always-listening system is in hibernate mode

while listening for an event or a wake word. When an event is

detected, the microphone switches to a Normal Mode where it

will operate as any standard PDM multi-mode microphone.

The VM3011 has an industry standard 3.76 x 2.95 x 1.3mm

package. The microphone is solder reflow compatible with no

sensitivity degradation. Vesper’s Piezoelectric MEMS

construction also enables operation in in environmentally harsh

surroundings due to IP57 dust and moisture resistance rating.

It is ideal for applications requiring voice activation in battery

powered consumer devices.

FEATURES

 Adaptive ZeroPower Listening

(ZPL) Microphone with

ultra-low power acoustic activity detection

 Ambient Sound Engine using I2C register readback

 Dust and moisture resistant

 Digital Output, Pulse Density Modulation (PDM)

 Mode switching using Clock Speed

 Adaptive ZPL mode configurable through I2C

 Ultra-fast startup in all modes including ZPL to Normal

mode, 200 µSec

 RFI and EMI robust

 Wide Temperature Range: -40C to 85C

 Industry standard 3.76 x 2.95mm LGA package footprint

APPLICATIONS

 Smart Home Devices

 TV Remotes

 Smart Watches and other Wearables

 IP Security Cameras

 Hearables

 Any battery-operated application with wakeup on sound

ORDERING INFORMATION

Product

Package Description

Quantity

VM3011AA

13” Tape and Reel

5,000

See Lid Marking Section for actual product marking

BLOCK DIAGRAM

TYPICAL APPLICATION CIRCUIT

Vesper reserves the right to alter the datasheet specifications

without notification. Vesper assumes no liability for the use of

engineering samples and offers no warranty for this product.

Page 2 of 21

info@vespermems.com

Document Name: VM3011_Datasheet

Revision: U0.0.8

VM3011

Low-Noise PDM Digital Piezoelectric MEMS Microphone with

Adaptive ZeroPower Listening

PRELIMINARY DATASHEET

TABLE OF CONTENTS

SPECIFICATIONS ....................................................................................................................................................... 3

DEVICE MODES .......................................................................................................................................................... 4

CHANNEL SELECTION ................................................................................................................................................ 4

PDM DIGITAL SPECIFICATIONS ............................................................................................................................... 4

ABSOLUTE MAXIMUM RATINGS ................................................................................................................................ 4

ENVIRONMENTAL ROBUSTNESS ............................................................................................................................... 5

RELIABILITY SPECIFICATIONS................................................................................................................................. 5

MICROPHONE OPERATION ....................................................................................................................................... 5

NORMAL MODE ............................................................................................................................................ 5

ADAPTIVE ZERO POWER LISTENING

MODE ................................................................................................. 6

MICROPHONE STATE DIAGRAM ................................................................................................................................ 8

POWER UP SEQUENCE ............................................................................................................................................... 8

TIMING SPECIFICATIONS ......................................................................................................................................... 9

ELECTRICAL SPECIFICATION FOR I/O STAGES AND BUS LINES ........................................................................... 10

I2C Operation .......................................................................................................................................................... 12

I2C Addresses .......................................................................................................................................................... 12

I2C Registers .......................................................................................................................................................... 12

I2C User Programmable Registers in VM3011 ....................................................................................................... 12

TYPICAL PERFORMANCE CHARACTERISTICS ......................................................................................................... 15

SOLDER REFLOW PROFILE ...................................................................................................................................... 16

HANDLING INSTRUCTIONS ..................................................................................................................................... 16

DIMENSIONS AND PIN LAYOUT .............................................................................................................................. 17

PCB DESIGN AND LAND PATTERN LAYOUT ............................................................................................................ 18

TAPE AND REEL SPECIFICATIONS .......................................................................................................................... 19

LID MARKING .......................................................................................................................................................... 20

SUPPORTING DOCUMENTS ..................................................................................................................................... 20

COMPLIANCE INFORMATION .................................................................................................................................. 20

CONTACT DETAILS ................................................................................................................................................... 20

LEGAL INFORMATION.............................................................................................................................................. 20

REVISION HISTORY................................................................................................................................................. 21

Vesper reserves the right to alter the datasheet specifications

without notification. Vesper assumes no liability for the use of

engineering samples and offers no warranty for this product.

Page 3 of 21

info@vespermems.com

Document Name: VM3011_Datasheet

Revision: U0.0.8

VM3011

Low-Noise PDM Digital Piezoelectric MEMS Microphone with

Adaptive ZeroPower Listening

PRELIMINARY DATASHEET

SPECIFICATIONS

The table below shows General Acoustic and Electrical specifications at 25°C, VDD = 1.8 V, unless otherwise noted.

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Supply Voltage

VDD

1.6

1.8

3.6

Sensitivity

SENS

1 kHz, 94 dB SPL

-27

-26

-25

dBFS

Output DC Offset

% FS

Roll Off Frequency

-3dB at 1KHz

100

Directivity

Omni

Polarity

Increase in sound pressure

Increase in density of 1’s

Supply Current- ZeroPower Listening

Mode

VDD On, CLK Off (CLK must be logic LOW)



Supply Current- Standby Mode

VDD On, 200kHz < CLK < 250 kHz

No Audio Output, DATA line outputs CLK at 50% Duty Cycle



Time to First Data Bit

Time from valid Vdd and CLK until the first valid bit is driven

on the DATA line. Output is Hi-Z until then.

0.1

Startup Time

(Powered Down, Standby or ZPL

Normal Mode)

Within ±0.5dB of actual sensitivity

0.2

Mode-Change Time

Between any modes (ZPL, Standby, Low Power, Full Power)

0.2

Note 1: In very quiet environments where SPL < 50 dB, the current consumption in ZPL mode will 

The table below shows specifications for ZeroPower Listening Mode (CLK OFF, LOGIC LOW) at 25°C, VDD = 1.8 V, unless otherwise noted.

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Max Acoustic Threshold

Read-only Register 0x01 = 0x1F, 1kHz signal

91.5

dB SPL

Min Acoustic Threshold

Read-only Register 0x01 = 0x00, 1kHz signal

dB SPL

Table below shows specifications for Normal Mode (1.1MHZ < CLK < 4MHZ) at 25°C, VDD = 1.8 V, CLK = 2.4MHz, unless otherwise noted.

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Signal-to-Noise Ratio

SNR

94 dB SPL at 1 kHz signal, 20Hz-20kHz, A-weighted Noise

dB(A)

Signal-to-Noise Ratio, Voice Band

SNR

94 dB SPL at 1 kHz signal, 20Hz-8kHz, A-weighted Noise

dB(A)

Total Harmonic Distortion THD

94 dB SPL

0.1

120dB SPL

Acoustic Overload Point

AOP

10.0% THD

122

dB SPL

Power Supply Rejection Ratio

PSRR

VDD = 1.8V, 1kHz, 100mV

Sine Wave

(1)

-57

dBFS/dBV

Power Supply Rejection PSR

VDD = 1.8V, 217Hz, 100mV

square wave, 20 Hz – 20kHz, A-

weighted

-87 dB(A)

Supply Current

CLK = 1.536MHz

525



CLK = 2.4MHz

635



CLK = 3.072MHz

725

A

(1)

PSRR will be -67dBFS/dBV if I2C uses a separate power supply that is not Vdd

Vesper reserves the right to alter the datasheet specifications

without notification. Vesper assumes no liability for the use of

engineering samples and offers no warranty for this product.

Page 4 of 21

info@vespermems.com

Document Name: VM3011_Datasheet

Revision: U0.0.8

VM3011

Low-Noise PDM Digital Piezoelectric MEMS Microphone with

Adaptive ZeroPower Listening

PRELIMINARY DATASHEET

Table below shows specifications for Low Power Mode (350kHZ < CLK < 900kHz) at 25°C, VDD = 1.8 V, CLK = 768kHz, unless otherwise noted.

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Signal-to-Noise Ratio, Voice Band

SNR

94 dB SPL at 1 kHz signal, 20Hz-8kHz, A-weighted Noise

dB(A)

Total Harmonic Distortion THD

94 dB SPL

0.1

120dB SPL

Acoustic Overload Point

AOP

10.0% THD

122

dB SPL

Power Supply Rejection Ratio

PSRR

VDD = 1.8, 1kHz, 100mV

Sine Wave

(2)

-57

dBFS/dBV

Power Supply Rejection PSR

VDD = 1.8, 217Hz, 100mV

square wave, 20 Hz – 8kHz, A-

weighted

-87 dB(A)

Supply Current

CLK = 768kHz

350



(2)

PSRR will be -67dBFS/dBV if I2C uses a separate power supply than Vdd

DEVICE MODES

MODE Conditions DATA Output DOUT Output

Mode Transition

Time

Supply Current

OFF

VDD OFF

ZPL

VDD ON, CLK OFF (LOGIC LOW)

ZPL FLAG

20



STANDBY

VDD ON, CLK ON (< 250 kHz)

PDM CLK, No Audio Output

200 

88 

LOW POWER

VDD ON, 350 kHz < CLK ON < 900

kHz

PDM ZPL FLAG 20 

Full POWER

VDD ON, CLK ON > 1.1 MHz

PDM

ZPL FLAG

700 

Note: 1) The first time Vdd is applied, it will take 1sec for the ZPL mode to adapt to the environment and be ready to trigger on external sounds.

2) In very quiet environments where SPL < 50 dB, the current consumption in ZPL mode will 

CHANNEL SELECTION

Channel

Select

Asserts DATA on

Latch DATA on

Left

GND

Falling Edge of CLK

Rising Edge of CLK

Right

VDD

Rising Edge of CLK

Falling Edge of CLK

PDM DIGITAL SPECIFICATIONS

Parameter

Conditions

Min.

Typ.

Max.

Units

Logic Input High

0.65*VDD

VDD

Logic Input Low

-0.3

0.35*VDD

Logic Output High

Load

= 0.5mA

0.7*VDD

VDD

Logic Output Low

Load

= 0.5mA

0.3*VDD

Driving Capability

100

ABSOLUTE MAXIMUM RATINGS

Parameter

Rating

Units

Supply Voltage

-0.3 to +3.6

Sound Pressure Level

160

dB re 20 

Operating Temperature Range

-40 to +85

°C

Storage Temperature Range

-55 to +150

°C

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