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WM8946ECS/R Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8946ECS/R Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 175 page  w WM8946 Stereo Low-Power CODEC with Video Buffer WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews Production Data, July 2012, Rev 4.3 Copyright 2012 Wolfson Microelectronics plc DESCRIPTION The WM8946 is a highly integrated low power hi-fi CODEC designed for portable devices such as digital still cameras. Up to 6 analogue inputs may be connected; a 2-channel digital microphone interface is also provided. Flexible output mixing options support single-ended and differential configurations, with outputs derived from the digital audio paths or from analogue bypass paths. Twin stereo outputs or stereo line and mono BTL headphone/speaker drive may be supported. Flexible digital mixing and powerful DSP functions are available. Programmable filters and other processes may be applied to the ADC or DAC signal paths. The DSP functions include 3D-stereo enhancement, 5 notch filters, 5-band EQ, dynamic range control and the Wolfson ReTune™ feature. The ReTune™ feature is a sophisticated digital filter that can compensate for imperfect characteristics of the housing, loudspeaker or microphone components in an application. The ReTune™ algorithm can provide acoustic equalisation and selective phase (delay) control of specific frequency bands. The WM8946 is controlled via a I2C or SPI interface. Additional functions include Digital beep generator, Video buffer, programmable GPIO functions, Frequency Locked Loop (FLL) for flexible clocking support and integrated LDO for low noise supply regulation. The WM8946 is supplied in 36-ball W-CSP package, ideal for portable systems. FEATURES Hi-fi audio CODEC - 94dB SNR during ADC recording (‘A’ weighted) - 96dB SNR during DAC playback (‘A’ weighted) 6 analogue audio inputs Integrated bias reference for electret microphones 2-channel digital microphone interface Powerful digital mixing / DSP functions: - 3D-stereo enhancement - 5-notch filters - 5-band equalizer (EQ) - ReTune™ parametric filter - Dynamic range control and noise gate - Low-pass/High-pass filters - Direct Form 1 (DF1) programmable digital filter Digital beep generator 4 analogue audio outputs Stereo line output Mono BTL headphone/speaker output driver I2S digital audio interface - sample rates 8kHz to 48kHz Frequency Locked Loop (FLL) frequency conversion / filter Video buffer function Integrated LDO low-noise voltage regulator 36-ball W-CSP package (2.97 x 3.07 x 0.7mm, 0.5mm pitch) APPLICATIONS Digital Still Cameras (DSC) Multimedia phones IN1R IN2R DCVDD DBVDD SPKVDD IN1L/DMICDAT IN2L ADC R ADC L AUX1 AUX2 ADC / Record Digital Filters DSP Core (3D surround, Re-Tune EQ, Dynamic Range Control) DAC Digital Filters DAC R DAC L CONTROL INTERFACE FLL GPIO DIGITAL AUDIO INTERFACE Digital Mic Interface -1 -1 Digital Beep Generator DMICCLK (GPIO) DMICDAT VBIN VBREFR W WM8946 OUTPUT MIXERS MICBIAS LDO Analogue Mic Mux / PGA Analogue Mic Mux / PGA SPKOUTL SPKOUTR LINEOUTL LINEOUTR VBOUT CURRENT MODE VIDEO BUFFER Reference |
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