AD1986BSTZ datasheet(3/52 Pages) AD

3 / 52 page

AD1986

Rev. 0 | Page 3 of 52

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.

•

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:

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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