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304永利官网入口-304永利官网入口又称MEMS麦克风,是基于MEMS技术制造的麦克风,由MEMS升压传感器芯片,ASIC芯片,音腔和RF抑制电路组成。MEMS声压传感器是一个由硅振膜和硅背极板构成的微型电容器,能将声压变化转化为电容变化,然后由ASIC芯片降电容变化转化为电信号,实现声--音转换
No. | Item | Specifications |
1 | Sensitivity | - 42±3dB (0dB=1V/Pa,1kHz) |
2 | Current Consumption | 0.2mA Max. |
3 | Total Harmonic Distortion at 94 dB SPL | ≤0.5% (1kHz) |
4 | Directional | Omnidirectional |
5 | S/N Ratio | more than 58dB |
6 | Output Impedance | ≤300Ω |
7 | Operating Voltage Range | 1.5V to 3.6V |
8 | Sensitivity Variation over Operating Voltage Range | 0.5dB |
9 | Frequency Range | 100Hz ~ 10KHz |
10 | Storage Temperature | -40 °C to +125°C |
11 | Operating Temperature | -40 °C to +100°C |
12 | Maximum Input Sound Level | 120 dB |
13 | Power Supply Rejection | -70 dB |
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