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AD1987 bảng dữ liệu(PDF) 11 Page - Analog Devices |
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AD1987 bảng dữ liệu(HTML) 11 Page - Analog Devices |
11 / 18 page AD1987 Rev. 0 | Page 11 of 18 | May 2007 POWER AND GROUND DVIO 3.3 V ±10% 3 I Connect to the I/O voltage used for the HD-audio controller signals. DVSS 4, 7 I Digital supply return (ground). DVDD 3.3 V ±10% 9 I Digital supply voltage 3.3 V. This is regulated down to Pin 1 to supply the internal digital core. AVDD 3.3 V ±5% 25, 38 I CAUTION: DO NOT APPLY 5.0 V TO THESE PINS! Analog supply voltage 3.3 V ONLY. Note: AVDD supplies should be well regulated and filtered as supply noise degrades audio performance. MIC_BIAS_IN 33 I Source for microphone bias boost circuitry. Connect this pin to 5.0 V via a low-pass filter. When connected this way the AD1987 is capable of providing +3.95 V as a mic bias to all of the mic bias pins. If 5 V is not available, connect this pin to +3.3 V (AVDD) via a low-pass filter. The AD1987 produces a mic bias voltage relative to the AVDD supply (typically 3.0 V @ AVDD = 3.3 V). AVSS 26, 42 I Analog supply return (ground). AVSS should be connected to DVSS using a conductive trace under, or close to, the AD1987. Table 5. AD1987 Pin Descriptions (Continued) Mnemonic Pin No. Function Description 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, SWAP = Outputs can swap L/R channels (typically used to support C/LFE or shared C/LFE function). |
Số phần tương tự - AD1987 |
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Mô tả tương tự - AD1987 |
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