MA-ERA381-H43-1A
MA-ERA381-H43-1A 是一款高信噪比、高声学过载点的差分输出底部端口 MEMS 麦克风，由一个双背板 MEMS 传感器和一个低噪声级专用集成电路（ASIC）组成。
优势与特点
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3.35×2.5×0.98 毫米底部端口
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差分输出
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窄灵敏度范围 ±1 分贝
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高信噪比，达 66 分贝 A 计权（dBA）
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高声学过载点（AOP），达 137 分贝声压级（dBSPL）
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射频屏蔽
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兼容标准表面贴装回流焊技术（SMD）
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符合 RoHS 标准且无卤素
性能参数
| Parameter | Symbol |
Condition | Min |
Nom. |
Max | Unit |
| Sensitivity | S | f=1kHz, Pin=1Pa, 0dB=1V/Pa | -39 | -38 | -37 | dB |
| Operating Voltage | VDD |
|
2.3 | 2.75 | 3 | V |
| Directivity |
|
|
Omni-directional |
|
||
| Polarity |
|
Sound pressure increase | Output voltage increase |
|
||
| Sensitivity vs. Voltage | ΔS | Vs= 3V to 2.3V | 0.5 | dB | ||
| Output Impedance | ZOUT | f=1kHz |
|
|
400 | Ω |
| Current Consumption1 | I | 2.3 V to 3V |
|
160 | 250 | µA |
| S/N Ratio | S/N | 20-20KHz Bandwidth, A-Weighted | 64 | 66 |
|
dBA |
| Total Harmonic Distortion | THD | 94dB SPL @1KHz |
|
0.1 | 0.5 | % |
| Total Harmonic Distortion | THD | 131dBSPL @1KHz |
|
1 |
|
% |
| Acoustic Overload Poin | AOP | THD 10%@1KHz |
|
137 |
|
dBSPL |
| Power Supply Rejection | PSR | 100mVpp Squarewave @217Hz, A-weighted |
|
-110 | -90 | dB |
| Power Supply Rejection Ratio | PSRR | 200mVpp Sinewave @1KHz | 70 | 87 |
|
dB |
| DC output | VDC |
|
|
1.30 |
|
V |
| Output load |
Cload |
|
|
|
150 | pF |
| Output load | Rload |
|
25 |
|
|
MΩ |
|
|
Note：Frequency response, sensitivity and current consumption are tested by 100% on product line. | |||||
