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23rd March 2012, 03:29 PM
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#1 |
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diyAudio Member
Join Date: Mar 2012
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PGA2311 daisy-chaining
Hello experts,
I am currently designing a multichannel preamp based on 3 Burr-Brown PGA2311. The datasheet, however, is not clear about the modalities of daisy-chaining. Can you control the volume separately for each one or just all together in this setup? Thanks Patrik |
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23rd March 2012, 04:17 PM
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#2 |
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diyAudio Member
Join Date: Feb 2007
Location: Midwest in the USA
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If they are daisy chained, in series, as shown in the datasheet, each 2311 can be set to any volume level. You will have to send 3 words (16 bits) of data to set the level of all (3) the PGA2311s. See Figure 4 on the datasheet and the associated verbiage. The interface behaves like one long 48 bit shift register.
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