wm8982gefl-v Wolfson Microelectronics plc, wm8982gefl-v Datasheet

wm8982gefl-v

Manufacturer Part Number

wm8982gefl-v

Description

Mono Codec With Speaker Driver And Video Buffer

Manufacturer

Wolfson Microelectronics plc

Datasheet

1.WM8982GEFL-V.pdf (108 pages)

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DESCRIPTION

The WM8982 is a low power, high quality CODEC with

integrated video buffer designed for portable applications such

as digital still camera or digital camcorder.

The device integrates a preamp for a differential mic, and

includes drivers for speaker and line outputs. External

component

microphone or headphone/speaker amplifiers are required.

An integrated video buffer is provided which has programmable

gain from 0-6dB, sync-tip clamp and a 3

filter for signal re-construction.

Advanced on-chip digital signal processing includes a 5-band

equaliser, a mixed signal Automatic Level Control for the

microphone or line input through the ADC as well as a purely

digital limiter function for record or playback. Additional digital

filtering options are available in the ADC path, to cater for

application filtering such as ‘wind noise reduction’.

The WM8982 CODEC can operate as a master or a slave. An

internal PLL can generate all required audio clocks for the

CODEC from common reference clock frequencies, such as

12MHz and 13MHz.

The WM8982 operates at analogue supply voltages from 2.5V

to 3.3V, although the digital core can operate at voltages down

to 1.71V to save power. The speaker outputs and mono line

output can run from a 5V supply if increased output power is

required. Individual sections of the chip can also be powered

down under software control.

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Mono CODEC With Speaker Driver and Video Buffer

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FEATURES

CODEC:

•

Mic Preamp:

•

Other features:

•

APPLICATIONS

•

DAC SNR 98dB, THD -84dB (‘A’ weighted @ 48kHz)

ADC SNR 90dB, THD -80dB (‘A’ weighted @ 48kHz)

1W output power into 8Ω BTL speaker / 5V SPKVDD

Differential microphone Interface

Low-noise bias supplied for electret microphones

Integrated 0-6dB video buffer with LPF filter and clamp.

Digital playback limiter

5-band Equaliser (record or playback)

Programmable ADC High Pass Filter (wind noise reduction)

Programmable ADC Notch Filter

Aux inputs for analog input signals or ‘beep’

On-chip PLL supporting 12, 13, 19.2MHz and other clocks

Low power, low voltage

5x5mm 32-lead QFN package

Camcorder or DSC

Capable of driving piezo speakers

Programmable preamp gain

Psuedo differential inputs with common mode rejection

Programmable ALC / Noise Gate in ADC path

2.5V to 3.6V (digital: 1.71V to 3.6V)

Pre-Production, September 2008 Rev 3.2

WM8982

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