KNOWLES MB9750USB-4

PRODUCT SPECIFICATION
Doc: MB9750USB-4
This specification applies to the electret condenser microphone outlined within this document.
Model Number:
I.
MB9750USB-4
Electrical Characteristics
ITEM
Test Condition (Vs= 1.5 V, RL= 0.68 k ohm, Ta=20°C, RH=65%)
SYMBOL
TEST CONDITION
Sensitivity
S
f=1kHz, Pin=1Pa
Impedance
Zout
f=1kHz, Pin=1Pa
MINIMUM
STANDARD
MAXIMUM
UNITS
-50
-47
-44
dB
0dB=1V/Pa
2.2
kΩ
0.5
mA
Directivity
UNIIDIRECTIONAL
Current Consumption
S/N Ratio
I
S/N (A)
Sensitivity Reduction
∆S
f=1kHz, Pin=1Pa
A Curve
f=1kHz, Pin=1Pa
Vs=
1.5 - 1.0
55
dB
-3
Frequency Range
100-10,000
dB
Hz
Frequency Response
Schematic Diagram of
Circuit
II.
Mechanical Characteristics
Dimensions
∅
9.7 x 5.0
See Drawing in Section IV
Weight
Less than
Solderering Heat Shock
To be no interferance in operation after soldering temperature exposure at 330°C +/-10°C
for below 2 seconds.
Terminal Mechanical
Strength
The soldering time must be less than 2 seconds each pad, and soldering pull must be larger
than 0.5Kg each pad.
Absolute Maximum
Ratings
1.0 g
Operating Voltage
Vs (V)
10
Storage Temperature Operation Temperature
Range
Range
Tope °C
Tstg °C
-40°C to +85°C
Issued Date:
2005/6/15
-30°C to +70°C
Version: A
PRODUCT SPECIFICATION
III.
Reliability Tests
Doc: MB9750USB-4
Note: After any of the following tests performed, the sensitivity of the microphone unit
shall not deviate more than ±3dB from its initial value. The microphone shall
maintain its initial operation and appearance. Measurements for tests with
thermal requirements are to be done after 2hrs of condistioning at 20°C.
Vibration Test
The microphone to have no interferance in operation after vibrations, 10Hz to 55Hz for
1minute full amplitude 1.52mm, for 2 hours at three axises.
Drop Test
The microphone unit must operate when dropped three times once on each axis from a
height of 1m onto a metal plate.
Temperature Test
High
The microphone unit must operate within its sensitivity specifications after
subjected to the following conditions: +85°C for 48 hrs, and exposed to room
temperature for 2 hrs.
Low
The microphone unit must operate within its sensitivity specifications after
subjected to the following conditions: -40°C for 48 hrs, and exposed to room
temperature for 2 hrs.
Humidity Test
+40°C at 95%RH for 240 hrs
Temperature Cycle Test
After exposure at -40°C for 1 hour, 2 hours ramp up to +70°C, at +70°C for 1 hour, ramp
down to -40°C in 2 hours, 20 cycles. (The measurements to be done after 2hrs of
conditioning at +20°C)
IV.
Dimensional Drawing
V.
Other
Directivity Request:-15dB(180 degree vs. 0 degree)
The information contained in this literature is based on our experience to date and is believed to be reliable and it is subject to change without notice. It
is intended as a guide for use by persons having technical skill at their own discretion and risk. We do not guarantee favorable results or assume any
liability in connection with its use. Dimensions contained herein are for reference purposes only. For specific dimensional requirements consult
factory. This publication is not to be taken as a license to operate under, or recommendation to infringe any existing patents. This supersedes and
voids all previous literature.
Issued Date:
2005/6/15
Version: A