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Old 23rd March 2012, 03:29 PM   #1
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Talking 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?
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Old 23rd March 2012, 04:17 PM   #2
stoc005 is offline stoc005  United States
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Location: Midwest in the USA
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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Old 23rd March 2012, 04:39 PM   #3
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Thanks a lot for the quick reply
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