GTA2718B-3
GTA2718B-3 是一款小封装、单端输出的底部端口模拟 MEMS 麦克风，由一个 MEMS 传感器和一个低噪声级 ASIC（专用集成电路）组成。
优势与特点
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2.75×1.85×1.0 毫米底部端口
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IPX8 级防水特性
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单端输出
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高信噪比（SNR）
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窄灵敏度范围 ±1 分贝
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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 | 3.6 | V |
| Directivity |
|
|
Omni-directional |
|
||
| Polarity |
|
Sound pressure increase | Output voltage increase |
|
||
| Sensitivity vs. Voltage | ΔS | Vs= 3.6V to 1.6V | ＜0.5 | dB | ||
| Output Impedance | ZOUT | f=1kHz |
|
|
400 | Ω |
| Current Consumption | I | 2.3 V to 3.6V |
|
135 | 200 | µA |
| S/N Ratio | S/N | f=1kHz, BW=20-20kHz, A-Weighted | 64 | 66 |
|
dBA |
| Total Harmonic Distortion | THD | 94dB SPL @1KHz |
|
0.05 | 0.5 | % |
|
|
125dBSPL @1KHz |
|
1 |
|
% | |
| Acoustic Overload Point | AOP | THD 10%@1KHz |
|
129 |
|
dBSPL |
| Power Supply Rejection | PSR | 100mVpp Square wave @217Hz, A-weighted |
|
-102 | -90 | dB |
| Power Supply Rejection Ratio | PSRR | 200mVpp Sinewave @1KHz | 60 | 71 |
|
dB |
| DC output | VDC |
|
|
1.1 |
|
V |
| Output load | Cload |
|
|
|
100 | pF |
| Rload |
|
8 |
|
|
KΩ | |
| 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
