DAC, using TLV5616 DAC ic

Discussion in 'Electronics Resources' started by TO2, Nov 27, 2011.

  1. TO2

    Thread Starter Member

    Jun 19, 2009
    26
    0
    Hello,

    I'm trying to use the TLV5616 DAC ic from TI, http://www.ti.com/product/tlv5616

    But I don't understand the REFIN input well.

    Mine connection are as follows
    Code ( (Unknown Language)):
    1. [FONT=Courier New]
    2. 1 DIN      <- MOSI
    3. 2 SCLK     <- SCK
    4. 3 !CS!     <- GND
    5. 4 FS       <- IO OUT
    6. 5 AGND     -  GND
    7. 6 REFIN    <- 3.3V/2
    8. 7 OUT      ->
    9. 8 VDD      <- 3.3V[/FONT]
    10.  
    When I send 0x0f 0xff
    I get OUT = REFIN

    But as I understand from the datasheet I should get REFIN * 2?
    page 11:
    The output voltage (full scale determined by external reference) is given by: 2REF * (CODE/2^n)

    (code is 12 bit dac value)

    Any ideas? :confused:
     
  2. Yako

    New Member

    Nov 24, 2011
    245
    2
    I suggest posting your code as well.

    Link the datasheet up too.
     
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