AD5262 daisy chain

Hi

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

1. U2(A0=0)

2. U2(A0=1)

3. U1(A0=0)

4. U1(A0=1)

 

Is this correct ?

 

Best regards,

wada

Parents
  • 0
    •  Analog Employees 
    on Aug 2, 2018 3:21 PM over 2 years ago
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin
  • Yes but what is the answer? Could i bit bang 18 bits and execute daisychain command with ad5262? Thx

  • 0
    •  Analog Employees 
    on Jan 21, 2020 6:08 AM 9 months ago in reply to gremlinc5

    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.

Reply
  • 0
    •  Analog Employees 
    on Jan 21, 2020 6:08 AM 9 months ago in reply to gremlinc5

    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.

Children