詳細(xì)信息
NO. 序 號(hào) | Parameter 參數(shù) | Symbol 符號(hào) | Condition 測試條件 | Limits范圍 | Unit (單位) | ||
Min. 最小值 | Center 中心值 | Max. 最大值 | |||||
1 | Sensitivity 靈敏度 | S | f=1KHZ,S.P.L=1Pa,0dB=1V/ubar | -54 | -56 | -58 | dB |
2 | Output impedance 輸出阻抗 | ZOUT | f= 1KHZ | 2.2 | KΩ | ||
3 | Current Consumption 消耗電流 | IDDS | Vcc=4.5V , RL=2.2KΩ | 150 | 450 | uA | |
4 | Signal to Noise Ratio 信噪比 | S/N | f=1KHZ,S.P.L=1Pa | 60 | dB | ||
5 | Decreasing Voltage 減電壓靈敏度 | △S-VS | Vcc=4.5V to 1.5V | -3 | dB | ||
6 | Operating Voltage 工作電壓 | 1 | 10 | V | |||
7 | Maximum input S.P.L 最大輸入聲壓 | 110 | dB | ||||
4.MEASUREMENT CIRCUIT測試電路
5. TYPICAL FREQUENCY RESPONSE CURVE (FAR FIELD)頻響曲線 Far Field Measurement Condition自由場測試條件 Temperature溫度：20±2℃ Bias Voltage基準(zhǔn)電壓： 4.5V (with 2.2KΩseries resistor 2.2KΩ電阻) Acoustic stimulus :1Pa (94Db SPL at1KHZ) at 50cm from the loud-speaker. 聲音條件：The loud-speaker must be calibrated to make a flat frequency response input signal 距離揚(yáng)聲器50cm出產(chǎn)生1Pa聲壓。 揚(yáng)聲器必須先用標(biāo)準(zhǔn)輸入信號(hào)事先校準(zhǔn)。 Position: The frequency response of microphone unit measured at 50cm from the loud-speaker 位置 ： 揚(yáng)聲器距離待測話筒50cm. |