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WM8944BECS/R 数据表(PDF) 1 Page - Cirrus Logic |
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WM8944BECS/R 数据表(HTML) 1 Page - Cirrus Logic |
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1 / 165 page  Mono Low-Power CODEC with Video Buffer http://www.cirrus.com Copyright Cirrus Logic, Inc., 2010–2016 (All Rights Reserved) Rev 4.3 NOV ‘16 WM8944B DESCRIPTION The WM8944B is a highly integrated low power hi-fi CODEC designed for portable devices such as digital still cameras. Up to 2 analogue inputs may be connected; a stereo 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. Mono line output and mono BTL headphone/speaker drive is supported. Flexible digital mixing and powerful DSP functions are available. Programmable filters and other processes may be applied to the ADC and DAC signal paths simultaneously. The DSP functions include 5 notch filters, 5-band EQ, dynamic range control and the 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 WM8944B 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 WM8944B is supplied in 25-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) 2 analogue audio inputs Integrated bias reference for electret microphones Digital microphone interface (Stereo) Powerful digital mixing / DSP functions: - 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 - 3D stereo enhancement (for digital mic input) Digital beep generator Mono 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 25-ball W-CSP package (2.41 x 2.41 x 0.55mm, 0.5mm pitch) APPLICATIONS Digital Still Cameras (DSC) Multimedia phones DCVDD DBVDD SPKVDD IN1/DMICDAT ADC L AUX ADC / Record Digital Filters DSP Core (L/HPF, 3D Surround, 5-notch filter, Re-Tune EQ, Dynamic Range Control) DAC Digital Filters DAC L CONTROL INTERFACE FLL GPIO DIGITAL AUDIO INTERFACE Digital Mic Interface -1 Digital Beep Generator DMICCLK (GPIO) DMICDAT VBIN VBREFR WM8944B OUTPUT MIXERS MICBIAS LDO Analogue Mic Mux / PGA SPKOUTP SPKOUTN LINEOUT VBOUT CURRENT MODE VIDEO BUFFER Reference |
类似零件编号 - WM8944BECS/R |
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类似说明 - WM8944BECS/R |
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