Knowles BT-1750 Electret Microphone Capsule
Code: MBT1750
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VAT
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Description
Knowles Model BT-1750 has port 0Kn and standard frequencey response
These are surplus production stock from legacy products.
Power Requirements
Supply Voltage (VS)
range: 0.9 to 10.0VDC
typical: 1.3VDC
Quiescent Current Drain (@ VS = 1.3VDC)
typical: 23uA
maximum: 50uA
Performance
Sensitivity Range @ primary test frequency: ±3dB
Low Supply Voltage Sensitivity Loss
(Vs reduced from 1.3 to 0.9VDC)
typical: 0.5dB
maximum: 3.0dB
Humidity Coefficient of Sensitivity
typical: 0.03dB per %RH
(in the absence of condensation)
Output Impedance @ 1kHz
range: 2.0 to 6.0k Hz
nominal: 3.5k Ohm
Acoustic Polarity
Increased pressure at sound inlet
causes a positive going voltage to
appear at the output terminal, relative
to the negative terminal
Power Supply Feedthrough Attenuation
typical: 14dB, output-referred
Load Voltage (VL)
range: 0.2 to 0.9VDC
typical: 0.5VDC
Output Noise Level
(A-weighted)
maximum: -101.0dBV
Input-Referred Noise Level*
(A-weighted, 1kHz ref.)
typical: 24dB SPL
maximum: 27dB SPL
Input-Referred Vibration Sensitivity*
(1g acceleration, 1kHz ref.)
maximum: 76dB SPL
Temperature Range
operating: -17°C to 63°C
storage: -40°C to 63°C
These are surplus production stock from legacy products.
Knowles product code: BT-1750
