GENERAL  DESCRIPTION
MSM381A3526H9AP ‐E  is  an
omnidirectional, Top ‐ported, analog  output  MEMS  microphone. It  has  high  performance  and  reliability. It  is  with  enhanced  RF  immunity  performance  .
MSM381A3526H9AP ‐E  is  available  in  a  thin  3.50 mm  × 2.65 mm  × 1.00 mm  OCLGA  package. It  is  SMT  compatible  with  no  sensitivity  degradation.
FEATURES
✧ Low  Noise  ✧ Omnidirectional  ✧ Excellent  RF  immunity  ✧ Standard  SMD  Reflow
✧ Compatible  with  Sn/Pb  and  Pb ‐free
solder  processes
✧ RoHS/Halogen  free  compliant  ✧ Sensitivity  Matching  within  +/‐1dB
APPLICATIONS
✧ Mobile  Phone  ✧ Laptop  ✧ Tablet  computer  ✧ Bluetooth  headset  ✧ Earphone
✧ Wearable  intelligent  equipment
PRODUCT  VIEW
ABSOLUTE MAXIMUM RATINGS
Parameter Maximum value Unit
Supply Voltage −0.3 to 4.0 V
Sound Pressure Level  140 dB SPL
Temperature Range −40 to 100 °C Electrostatic discharge protection 2 (HBM) kV
Stresses exceeding these “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation at these or any other conditions beyond those indicated under “Acoustic & Electrical Specifications” is not implied. Exposure beyond those indicated under “Acoustic & Electrical Specifications” for extended periods may affect device reliability.
ACOUSTIC & ELECTRICAL SPECIFICATIONS
All data taken at 25°C, Relative Humidity 45±5% unless otherwise specified
Limits unit condition
Min. Nom.Max.
Directivity Omni directional
Sensitivity ‐39 ‐38‐37dB@1kHz ref 1V/Pa Operation voltage    1.5 ‐  3.6V
Freq. range Refer to the frequency response
graphic
Hz
Ref to
sensitivity@1kHz
Sensitivity loss across
supply voltage
No change across the voltage range dB
Signal to noise ratio  ‐ 63 ‐ dB 20 kHz bandwidth,
A‐weighted
THD ‐ 0.15 ‐ % 94dB  SPL  @1kHz S =Nom, Rload > 2 k　
AOP ‐ 123 ‐ dB SPL
10% THD @1kHz S =Nom, Rload > 2 k　
Polarity Increasing output voltage Increasing sound pressure
Output impedance ‐ 200‐Ω@1kHz  DC Output  0.7V
PSRR ‐ 70 ‐ dB 200mVpp sine wave  @1 kHz, V DD = 1.8V
PSR ‐ ‐100 ‐ dBV(A)
100mVpp square wave@217 Hz, V DD = 1.8V, A‐weighted
Current consumption‐ 150170μA Storage temperature‐40 ‐100°C
TYPICAL  FREQUENCY  RESPONSE
‐20
‐1001020
S e n s i t i v i t y  (d B  V /P a )
Frequence  (Hz)
Frequency  Response  @94dB  SPL
1002005001K 2K 5K 10K
SMT  Parameters ：
1.
2. Recommend  reflow  profile:
Description
Parameter  Pb ‐free  Average  ramp ‐up  rate
T  smax to  T P
3°C/sec  max  Preheat
Minimum  temperature        Maximum  temperature        Time(T SMIN  to  T SMAX )  T SMIN  T SMAX  t S  150 °C  200 °C
60 sec  to  180 sec  Ramp ‐up  rate
T SMAX  to  T L
1.25 °C/sec  Time  maintained  above  liquidus  temperature  Liquidus  temperature  t L  T L  60 sec  to  150 sec
217 °C
Peak  temperature
headsetT P  260 °C  Time  within  5°C  of  actual  peak  temperature  t P  20 sec  to  40 sec  Ramp ‐down  rate
T P  to  T  smax
6 °C/sec  max  Time  25 °C  (t25 °C) to  peak  temperature  t
8 minutes  max
OUTLINE  DIMENSIONS  AND  PIN  DEFINITION ：
Item  Dimension Tolerance  Length  (L)    3.50 ±0.10 Width  (W)    2.65 ±0.10 Height  (H)    1.00 ±0.10 Acoustic  Port  (AP)
Ø0.325
±0.05
PIN  function  description  PIN# Function  1 GND  2 GND  3 GND  4 OUT  5 GND  6 VDD
Dimensions  are  in  millimeters
Tolerance  is  ±0.15mm  unless  otherwise  specified.
SIDE  VIEW
TOP  VIEW
BOTTOM  VIEW

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