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APR9301 Datasheet(PDF) 5 Page - Aplus Intergrated Circuits |
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APR9301 Datasheet(HTML) 5 Page - Aplus Intergrated Circuits |
5 / 10 page INTEGRATED CIRCUITS INC. - APR9301 http://www.aplusinc.com.tw Page / 10 VER2.3 5 Figure 4 shows the same application using external microphone biasing instead of the microphone amplifier on the APR9301 device, thus bypassing the preamplifier portion of the chip function. Figure 4 Sample Application Using External Microphone Biasing : Notes: NC=No Connect (must be floating). Pins 23 and 27 have internal pull-up resistors. The typical sampling frequency is 6.4kHz with OscR=52kΩ NPN bipolar transistor,T1 model #MPS3904 or equivalent. Electrical Characteristics Tables 2 through 4 list Absolute Maximum Ratings, Recommended DC Characteristics, and recommended Analog Characteristics for the APR9301 device |
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