Rev 1.0
July2019
Vesper Technologies Inc.
77 Summer St, 8th floor
Boston, MA - 02110
VM3000 Coupon PCB
User Guide
Rev 1.0
By Shin Nagpal
General Description
This document describes the S-VM3000-C Coupon PCB evaluation board. The coupon PCB
provides a quick and simple way of evaluating the Pulse Density Modulation (PDM) digital
output microphone, VM3000. The board consists of a VM3000 bottom port MEMS
microphone and a 0.1uF power supply bypass capacitor along with an edge connector.
The user can simply use a corresponding female connector (CW Industries CWR-170-10-
0000) or solder wires to make good electrical contact to the power and output pins of the
microphone.
Pinout and Pin Descriptions
The board is shown in Figure 1 as follows and the corresponding pins in Table 1 have
been labeled:
Figure 1. VM3000 Coupon PCB
Rev 1.0
July2019
Vesper Technologies Inc.
77 Summer St, 8th floor
Boston, MA - 02110
VM3000 Coupon PCB
User Guide
Rev 1.0
By Shin Nagpal
Pin Name
Description
DATA
PDM Digital Output
L/R SELECT
Left/Right Channel Select (High=Left,
Low=Right)
CLK
Clock (2.4MHz typical)
VDD
Power Supply (1.6-3.6V)
GND
Ground
Table 1: Pinout Configuration
Edge Connector
VM3000 Coupon PCB can be used with an Edge connector from CW Industries with part
number CWR-170-10-0000 as shown in Figure 2. Supply range for Vdd is 1.6V – 3.6V.
Figure 2: Connections on VM3000 Coupon PCB and Edge Connector CWR-170-10-0000
Vesper VM3000
Coupon PCB User Guide
3
Vesper Technologies Inc.
77 Summer St, 8th floor
Boston, MA - 02110
Rev1.0
July2019
Schematic
The schematic of the board and the PCB layout is shown in Figure 3 and Figure 4
respectively.
Figure 3. S-VM3000-C Coupon PCB Schematic
Figure 4. S-VM3000-C Coupon PCB Board Layout ( all dimensions in mm)
Vesper VM3000
Coupon PCB User Guide
4
Vesper Technologies Inc.
77 Summer St, 8th floor
Boston, MA - 02110
Rev1.0
July2019
Other Information
The detailed specifications and description of the VM3000 microphone can be found in
the product datasheet. For convenience the basic parameters and absolute maximum
ratings also shown in Table 2 and 3 below:
Parameter
Typical Value
Units
Supply Voltage
1.8
V
Sensitivity @ 94dB SPL
-26.0 +/- 1
doffs
Output DC Offset
0.05
dBFS
Supply current – sleep mode (VDD
On, CLK Off)
2.5
µA
Supply current – standby mode
(VDD On, CLK <250KHz)
115
µA
Supply current – Low Power mode
(CLK = 768 MHz)
400
µA
Supply current – Normal mode
(CLK = 2.4 MHz)
700
µA
Table 2. Typical parameters for microphone operation
Vesper VM3000
Coupon PCB User Guide
5
Vesper Technologies Inc.
77 Summer St, 8th floor
Boston, MA - 02110
Rev1.0
July2019
Parameter
Rating
Units
Supply Voltage
-0.3 to +3.6
V
Sound Pressure Level
160
dB re 20 μPa
Operating Temperature Range
-40 to +85
°C
Storage Temperature Range
-55 to +150
°C
Table 3. Absolute Maximum Ratings
For additional information on Vesper’s latest roadmap of microphone products, reach out
to sales@vespermems.com.
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