Datasheet

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• This PDF catalog is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our
sales representatives or product engineers before ordering.
• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
!Note
S15E.pdf
08.10.31
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Electrical Characteristics
• The sensor can be used in the operating temperature range. Please refer to the individual specification for the temperature drift of Sensitivity/
Sound pressure level or environmental characteristics in that temperature range.
• Directivity, and Detectable Range is typical value. It can be changed by application circuit and fixing method of the sensor.
Part Number
Item
MA80A1 MA200A1 MA400A1
Construction
High frequency type
Using Method
Combined use type
Center Frequency (kHz)
75±5 200±10 400±20
Overall Sensitivity (dB)
-47 min.
0dB=18Vpp
(at 50 cm)
-54 min.
0dB=18Vpp
(at 20 cm)
-74 min.
0dB=18Vpp
(at 10 cm)
Directivity (deg)
7
Operating
Temperature Range (°C)
-10 - +60 -30 - +60
Detectable Range (m)
0.5 - 5 0.2 - 1 0.06 - 0.3
Dimension (mm)
ø47×24.5h ø19×10.6h ø11×10.5h
Weight (g)
93 6 2
Max. Input Voltage
120 Vp-p
Square waves 75kHz
Pulse width 600
µs
Interval 5
0 ms
120 Vp-p
Square waves 200kHz
Pulse width 250
µs
Interval 2
0 ms
120 Vp-p
Square waves 400kHz
Pulse width 125
µs
Interval 1
0 ms
-40
-50
-60
-70
-80
-90
-100
30 35 40 45 50
Frequency (kHz)
Sensitivity (dB)
MA40S4R
MA40E7R
Fig. 8 Sensitivity
140
130
120
110
100
90
80
30 35 40 45 50
MA40S4S
MA40E7S
Frequency (kHz)
Sound Pressure Level (dB)
Fig. 9 Sound Pressure
90
60
30
0
-10
-20
-30
MA40E7R
MA40S4R
60
30
90
Attenuation (dB)
Fig. 10 Radiation Characteristics (Receiver)
3030
0
-10
-20
-30
MA40E7S
MA40S4S
90
6060
90
Attenuation (dB)
Fig. 11 Radiation Characteristics (Transmitter)
Frequency 40kHz
Distance 30cm
RL=3.9kΩ
0dB=10V/Pa
Frequency 40kHz
Input Voltage 10Vrms (Sine Wave)
Distance 30cm
Distance 30cm
Input Voltage 10Vrms (Sine Wave)
0dB=20µPa