AD1986A 데이터 시트보기 (PDF) - Analog Devices

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AD1986A

AC ’97 and HD Audio SoundMAX Codec

Analog Devices 

NOTES

REDUCED SUPPORT COMPONENTS

The AD1986A includes many improvements that reduce

external support components for particular applications.

• Multiple Microphone Sourcing: The MIC_1/2, LINE_IN

and C/LFE pins can all be selected as sources for

microphone input (boost amplifier).

• Multiple VREF_OUT Pins: Each microphone-capable pin

group (MIC_1/2, LINE_IN and C/LFE) has separate,

software controllable VREF_OUT pins, reducing the need

for external biasing components.

• Internal Microphone Mixing: Any combination of the

MIC_1/2, LINE_IN and C/LFE pins can be summed to

produce the microphone input. This removes the need for

external mixing components in applications that externally

mix microphone sources.

AD1986A

• Advanced Jack Presence Detection: Using two codec pins,

eight resistors and isolated switch jacks, the AD1986A can

detect jack insertion on eight separate jacks.

• Internal Microphone/Line In/C/LFE Sharing: On

systems that share the microphone with the C/LFE jack no

external components are required. The microphone

selector can select the LINE_IN pins when the microphone

and line input devices are swapped.

• Internal Line In/Microphone/Surround Sharing: On

systems that share the line in with the surround jack no

external components are required.

• Dual Headphone Amplifiers: The AD1986A can drive

headphones out of the HP_OUT or LINE_OUT pins.

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