Please show me how to use daisy chain of AD5262.
In data sheet, the discription is only AD5260 single digi-pot.
I think a procedure for writing is
Is this correct ?
I have read carefully the D/S again.
and I understood that the limitation is only "U2-->U1" and this sequence have nothing to do with address(Bit :A0).
Therefore, the correct sequence for daisy chain of Dual Ch x2 is simply...
U2(A0 = 0 or 1) --> U1(A0 = 0 or 1) -->U2(A0 = 0 or 1) --> U1( A0 = 0 or 1)
Is it correct ?
I'm sorry for basic question.
But, our customer need a certain answer from ADI.
Yes but what is the answer? Could i bit bang 18 bits and execute daisychain command with ad5262? Thx
Based on Figure 52 in DS, the correct sequence is U2(A0 = 0 or 1) --> U1(A0 = 0 or 1) . Only 18 bits data input from SDI is allowed in one SPI write transaction for AD5262. Only the 18 MSB bits will be taken and others will be ignored, if more than 18 bits data are passed in one frame.
Yes, the user can bit-bang 18 bits and execute daisy chain command with AD5262. Instructions mentioned in Table 8 in the datasheet must be followed.
It is noted that all SDOs of AD5262 requires a pull-up resistor instead of only U1 as shown in Figure 52 in the datasheet. This is clearly mentioned in Table 5 or Table 6 in the datasheet.
Thank you very much, so if I use 24 of them, I will have 12 CS pins/query to command as minimum. Thx.