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WM8976, WM8976GEFL/7RV, WM8976GEFL/V

Table of contents:
Info of WM8976
Info of WM8976GEFL/7RV
Info of WM8976GEFL/V

WM8976, WM8976GEFL/7RV, WM8976GEFL/V Selling Leads, Datasheet

MFG:WOLFSON Package Cooled:BGA D/C:05+

WM8976, WM8976GEFL/7RV, WM8976GEFL/V Picture

WM8976, WM8976GEFL/7RV, WM8976GEFL/V Datasheet download

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Part Number: WM8976

MFG: WOLFSON

Package Cooled: BGA

D/C: 05+

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WM8976 General Description

The WM8976 is a low power, high quality codec designed forportable applications such as Digital still camera or DigitalCamcorder.

The device integrates a preamp for a differential mic, andincludes drivers for speakers, headphone and differential orstereo line output. External component requirements arereduced as no separate microphone or headphone amplifiersare required.

Advanced on-chip digital signal processing includes a 5-bandequaliser, a mixed signal Automatic Level Control for themicrophone or line input through the ADC as well as a purelydigital limiter function for record or playback. Additional digitalfiltering options are available in the ADC path, to cater forapplication filtering such as 'wind noise reduction'.The WM8976 CODEC can operate as a master or a slave. Aninternal PLL can generate all required audio clocks for theCodec from common reference clock frequencies, such as12MHz and 13MHz.

The WM8976 operates at analogue supply voltages from 2.5Vto 3.6V, although the digital core can operate at voltages downto 1.8V to save power. The speaker outputs and OUT3/4 lineoutputs can run from a 5V supply if increased output power isrequired. Individual sections ofthe chip can also be powereddown under software control.

WM8976 Maximum Ratings

CONDITION	MIN	MAX
DBVDD, DCVDD, AVDD supply voltages	-0.3V	+3.63V
SPKVDD supply voltage	-0.3V	+7V
Voltage range digital inputs	DGND -0.3V	DVDD +0.3V
Voltage range analogue inputs	AGND -0.3V	AVDD +0.3V
Operating temperature range, T_A	-25°C	+85°C
Storage temperature prior to soldering	30oC max / 85% RH max
Storage temperature after soldering	-65°C	+150°C

WM8976 Features

• Stereo Codec:
• DAC SNR 98dB, THD -84dB ('A' weighted @ 48kHz)
• ADC SNR 90dB, THD -80dB ('A' weighted @ 48kHz)
• On-chip Headphone Driver with 'capless' option- 40mW output power into 16 / 3.3V SPKVDD
• 0.9W output power into 8 BTL speaker / 5V SPKVDD- Capable of driving piezo speakers- Stereo speaker drive configuration
• Mic Preamps:
• Differential or single-ended microphone Interface- Programmable preamp gain- Psuedo differential input with common mode rejection- Programmable ALC / Noise Gate in ADC path
• Low-noise bias supplied for electret microphones
• Other features:
• Enhanced 3-D function for improved stereo separation
• Digital playback limiter
• 5-band Equaliser (record or playback)
• Programmable ADC High Pass Filter (wind noise reduction)
• Programmable ADC Notch Filter
• Aux inputs for stereo analog input signals or 'beep'
• On-chip PLL supporting 12, 13, 19.2MHz and other clocks
• Low power, low voltage- 2.5V to 3.6V (digital core: 1.8V to 3.6V)- power consumption <30mW all-on with 2.5V supplies
• 5x5mm 32-pin QFN package

WM8976 Typical Application

• Stereo Camcorder or DSC

WM8976 Connection Diagram

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