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AD1884 データシート(PDF) 11 Page - Analog Devices |
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AD1884 データシート(HTML) 11 Page - Analog Devices |
11 / 16 page AD1884 Table 3. AD1884 Pin Descriptions (Continued) Mnemonic Pin No. I/O Description AVDD 3.3 V 25, 38 I CAUTION: DO NOT APPLY 5 V TO THESE PINS! Analog Supply Voltage 3.3 V ONLY. MIC_BIAS_IN 33 I Note: AVDD supplies should be well regulated and filtered as supply noise degrades audio performance. Source Power for Microphone Bias Boost Circuitry. 5.0 V or 3.3 V Connect this pin to 5.0 V via a low-pass filter. When connected this way the AD1884 is capable of providing +3.9 V as a mic bias to all of the mic bias pins (except on Pin 31). If 5 V is not available, connect this pin to +3.3 V (AVDD) via a low-pass filter. AVSS 26, 42 I The AD1884 produces a mic bias voltage relative to the AVDD supply (typically 3.0 V @ AVDD = 3.3 V). Analog Supply Return (Ground). AVSS should be connected to DVSS using a conductive trace under, or close to, the AD1884. The symbols used in this table are defined as: I = Input, O = Output, LI = Line Level Input, LO = Line Level Output, HP = Output capable of driving headphone load, MIC = Input supports microphones with MIC bias and boost amplifier. Rev. 0 | Page 11 of 16 | January 2007 |
同様の部品番号 - AD1884_15 |
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同様の説明 - AD1884_15 |
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