MA-DRA381-H13
MA-DRA381-H13 是一款高信噪比、高声学过载点的单输出底部端口模拟 MEMS 麦克风，由一个 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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4.0×3.0×1.2 毫米底部端口
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窄灵敏度范围 ±1 分贝
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高信噪比，达 70 分贝 A 计权（dBA）
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高声学过载点（AOP），达 130 分贝声压级（dBSPL）
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容标准表面贴装回流焊技术（SMD）
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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 |
|
2.4 | 2.75 | 3.3 | V |
| Directivity |
|
|
Omni-directional |
|
||
| Polarity |
|
Sound pressure increase | Output voltage increase |
|
||
| Sensitivity vs. Voltage | ΔS | Vs= 3.3V to 2.4V | 0.5 | dB | ||
| Output Impedance | ZOUT | f=1kHz |
|
|
400 | Ω |
| Current Consumption1 | I | 3.3V to 2.4V |
|
110 | 200 | µA |
| S/N Ratio | S/N | 20-5KHz Bandwidth, A-Weighted |
|
72 |
|
dBA |
| 20-8KHz Bandwidth, A-Weighted |
|
71 |
|
dBA | ||
| 20-20KHz Bandwidth, A-Weighted |
|
70 |
|
dBA | ||
| Total Harmonic Distortion | THD | 94dB SPL @1KHz |
|
0.1 | 0.5 | % |
| Total Harmonic Distortion | THD | 124dBSPL @1KHz |
|
1 |
|
% |
| Acoustic Overload Poin | AOP | THD 10%@1KHz |
|
130 |
|
dBSPL |
| Power Supply Rejection | PSR | 100mVpp Squarewave @217Hz, A-weighted |
|
-103 | -90 | dB |
| Power Supply Rejection Ratio | PSRR | 200mVpp Sinewave @1KHz | 60 | 71 |
|
dB |
| DC output | VDC |
|
|
1.30 |
|
V |
| Low Frequency Roll-off | LFRO |
|
|
|
20 | Hz |
| Output load |
Cload |
|
|
|
150 | pF |
| Output load | Rload |
|
0.01 |
|
10 | MΩ |
|
|
Note：Frequency response, sensitivity and current consumption are tested by 100% on product line. | |||||
应用实例
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头戴耳机
