Electronic Components Datasheet Search |
|
BW0405XA Datasheet(PDF) 11 Page - Samsung semiconductor |
|
BW0405XA Datasheet(HTML) 11 Page - Samsung semiconductor |
11 / 14 page 0.35 µµµµm 16-BIT 44.1KHZ SIGMA-DELTA STEREO DAC BW0405XA 11 FUNCTIONAL DESCRIPTION Compensation Filter & De-emphasis/ FIR Filter Sinc Filter & Σ∆ Modulator 4bit DAC & SC-Postfilter Anti-Image Filter SDATA BCK LRCK AoutL 4Fs/8Fs 16bits 64Fs 1bit DEEM DN 1Fs/2Fs 16bits S/P Converter & Attenuator MCLK MDATA MLD AoutR MUTEL Figure 4. Funtional Block Diagram Fig4 is the 1bit 4th order sigma-delta DAC block daigram. S/P Converter converts serial 16bit input data to parallel 16bit data. Digital input data is attenuated by MICOM interface pin control. Compensation Filter compensates gain droop in Passband by Sinc Filter and Sigma-Dellta Modulator Signal Transfer Function. De-emphasis Block de- emphasizes pre-emphasised input data to emphssize high frequency in audible band. FIR Filter perfroms 4X interpolation. And it outputs 4Fs(DN='Low') rate data or 8Fs(DN='High') rate data by variabled input data rate. It also removes the images of the input signal that are present at multiples of the input sample frequency. And Sinc filter makes the constant 64Fs rate data by 16 times or 8 times upsampling FIR Filter output data according to DN(Double/Normal Mode) Pin Selection. This operation intorduces a sinc function responce on the resulting frequency spectrum, which greatly attenuates the energy of images at the multifules of 4Fs(or 8Fs). Digital sigma-delta modulator of bit-stream type has the IFL (Inverse-Follower-Leader) topology, and it performs a noise-shaping function. The modulator shapes the quantization noise by suppressing its in-band component and pushes the noise energy of outside the band-of-interest without deteriorating the audio input signal. The 64 times oversampled 1-bit PDM outputs from the modulator drives a analog postfilter. The analog postfilter comprises SC-postfilter, anti-imaging filter. The SC-postfilter removes the quantization noise shaped to out-of-band by digital sigma-delta modulator. This analog filter has the good clock jitter characteristc and very linear characteristic. And following the CTF(continuous time filter) removes the sampling images and makes the high resolution analog output. |
Similar Part No. - BW0405XA |
|
Similar Description - BW0405XA |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |