AD1986 데이터 시트보기 (PDF) - Analog Devices

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AD1986

AC ’97 SoundMAX CODEC

Analog Devices 

NOTES

REDUCED SUPPORT COMPONENTS

The AD1986’s many improvements reduce external support

components for particular applications.

• Multiple Microphone Sourcing: The MIC_1/2, LINE_IN

and C/LFE pins may 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 may be summed to

produce the microphone input. This removes the need for

external mixing components in those applications that

externally mixed microphone sources.

AD1986

• Advanced Jack Presence Detection: Using two CODEC

pins, eight resistors and isolated switch jacks, the AD1986

can detect jack insertion on eight separate jacks. Previous

CODECs would have required 8 CODEC pins and

16 resistors.

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

that share the microphone with the C/LFE jack there are

no external components required. The micro-phone

selector can select the LINE_IN pins in those cases where

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 there

are no external components required.

• Dual Headphone Amplifiers: The AD1986 can drive

headphones out of the HP_OUT or LINE_OUT pins.

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