CSR8635 查看數據表（PDF） - CSR plc

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CSR8635

The CSR8635 QFN single-chip Bluetooth® audio ROM device targets mid-range stereo speakers and headsets.

CSR plc 

9.2.7 ADC Digital IIR Filter

The ADC contains 2 integrated anti-aliasing filters:

■ A long IIR filter suitable for music (>44.1kHz)

■ G.722 filter is a digital IIR filter that improves the stop-band attenuation required for G.722 compliance (which

is the best selection for 8kHz / 16kHz / voice)

For more information contact CSR.

9.2.8 DAC

The DAC consists of:

■ 2 fourth-order Sigma-Delta converters enabling 2 separate channels that are identical in functionality, as Figure

9.2 shows.

9E9AaTanha..9d22aec-ilDgbh..o■■■■■■■■■■o91iiigttvDga0ugeiAltearagCa2811234449ilaanl41262086kDDGlgimsH...kkkkknVgsa001uaHHHHHAAezpaai25kspin012ntzzzzzlilHt50intpCCuafiskkinSozePegctHHgraereoSDrtzzesglseneiapeinenttcgrhssatmatotieiiriobdlftneoapnolefgidornfllstleegthlf.GohoaegwercRaaDhiqDniainADingcAntChAcgCesahCbavnaimoSasnDnrpeckgeiiegolelee,lsinevst1ar(tfec3arridlnoono06.ttBG5felm.i1lzo)ewsa/h:d3i-nhn2o2ibc4uSyshdet-Bteithsetpietnxosagc,fni2erfom1alpr.n5womadialnoBorDtegr,.eic.usgoIeeiitntmsaegfols.aTcGreimaVnntabta1aisi-89nlnle0ttugiFaoSe9grniies.ed3lceaa.aocyTncnt,hidotoaSemntcrehebtepiCintsoeSetamdhRlesDb.fuoreAnirasCc2tfaiiD7ond,neigi2giogt0i-atfa(2a--1dlti210nlh3BG48g.ei5)anaditinenigrSsfitateaactlgteainenwg.dith

3

9.5

11

-14.5

4

12

12

-12

5

15.5

13

-8.5

6

18

14

-6

7

21.5

15

-2.5

Table 9.3: DAC Digital Gain Rate Selection

9.2.11 DAC Analogue Gain

Table 9.4 shows the DAC analogue gain stage consists of 8 gain selection values that represent seven 3dB steps.

Production Information

© Cambridge Silicon Radio Limited 2013

Confidential Information - This Material is Subject to CSR's Non-disclosure Agreement

Page 40 of 105

CS-303725-DSP5

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