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

1 DIN      <- MOSI
2 SCLK     <- SCK
3 !CS!     <- GND
4 FS       <- IO OUT
5 AGND     -  GND
6 REFIN    <- 3.3V/2
7 OUT      ->
8 VDD      <- 3.3V

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?

 

I suggest posting your code as well.

Link the datasheet up too.