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AD1987 Datasheet(PDF) 7 Page - Analog Devices |
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AD1987 Datasheet(HTML) 7 Page - Analog Devices |
7 / 18 page AD1987 Rev. 0 | Page 7 of 18 | May 2007 HD–AUDIO LINK SPECIFICATION HD-audio signals comply with the High Definition audio speci- fications. Please refer to these specifications at: http://www.intel.com/standards/hdaudio/ POWER DOWN STATES Parameter IDVDD Typ IAVDD Typ Unit Function Node in D0, All Nodes Active 66 41 mA Function Node in D31 1 Function node D3 state powers down all nodes except for the VREF, Mixer and MIC_BIAS nodes which have independent power controls. VREF should be kept active when background functions such as jack presence detection or analog pass-through are required. Mixer should be kept active when analog pass-through is required. MIC_BIAS can be disabled if microphones are not in use in the power-down state. 21 1.2 mA Codec in RESET 33mA Individual Block Power Savings DAC Pair Powered Down Saves (Each) ADC Pair Powered Down Saves (Each) Mixer Power Control (And Associated Amps) Saves MIC_BIAS Powered Down Saves 2, 3 2 Powering down the MIC_BIAS powers down all port MIC_BIAS pins. This disables all microphone bias circuits set to 100% or 50%, setting them to the Hi-Z state. The 0 Ω and Hi-Z states remain unaffected by the MIC_BIAS power state. 3 Test conditions: 30 pF load, 2.0 MHz frequency, 3.3 V AVDD. 6 5.3 0 0 5 3.2 2 0.5 mA mA mA mA |
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