 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
PCM1609A Datasheet(PDF) 35 Page - Texas Instruments |
|
|
||||||||||||||||||||||||||||||
PCM1609A Datasheet(HTML) 35 Page - Texas Instruments |
|
|
35 / 43 page  www.ti.com THEORY OF OPERATION B0008-03 + + − Z–1 + + + + + + 8-Level Quantizer − Z–1 IN 8 fS OUT 64 fS + + Z–1 + + Z–1 + PCM1609A SLES145A – AUGUST 2005 – REVISED AUGUST 2006 The DAC section of the PCM1609A is based on a multi-bit delta-sigma architecture. This architecture uses a fourth-order noise shaper and an 8-level amplitude quantizer, followed by an analog low-pass filter. A block diagram of the delta-sigma modulator is shown in Figure 36. This architecture has the advantage of stability and improved jitter tolerance, when compared to traditional 1-bit (2-level) delta-sigma designs. Figure 36. Eight-Level Delta-Sigma Modulator The combined oversampling rate of the digital interpolation filter and the delta-sigma modulator is 32 fS, 64 fS, or 128 fS. The total oversampling rate is determined by the desired sampling frequency. If fS ≤ 96 kHz, then the OVER bit in register 12 can be set to an oversampling rate of 64 fS or 128 fS. If fS > 96 kHz, then the OVER bit can be used to set the oversampling rate to 32 fS or 64 fS. Figure 37 shows the out-of-band quantization-noise plots for both the 64 × and 128× oversampling scenarios. Notice that the 128× oversampling plot shows significantly improved out-of-band noise performance, allowing for a simplified low-pass filter to be used at the output of the DAC. 35 Submit Documentation Feedback |
Similar Part No. - PCM1609A |
|
Similar Description - PCM1609A |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
