MA-ERA381-H43-1A
MA-ERA381-H43-1A 是一款高信噪比、高聲學(xué)過載點(diǎn)的差分輸出底部端口 MEMS 麥克風(fēng)，由一個(gè)雙背板 MEMS 傳感器和一個(gè)低噪聲級(jí)專用集成電路（ASIC）組成。
優(yōu)勢(shì)與特點(diǎn)
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3.35×2.5×0.98 毫米底部端口
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差分輸出
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窄靈敏度范圍 ±1 分貝
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高信噪比，達(dá) 66 分貝 A 計(jì)權(quán)（dBA）
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高聲學(xué)過載點(diǎn)（AOP），達(dá) 137 分貝聲壓級(jí)（dBSPL）
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射頻屏蔽
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兼容標(biāo)準(zhǔn)表面貼裝回流焊技術(shù)（SMD）
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符合 RoHS 標(biāo)準(zhǔn)且無鹵素
性能參數(shù)
| 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. | ||||||
