AD5760, gain of two, output span

Question

Hello, 
 in our application we intend to use AD5760B DAC for bipolar output +10V/-10V, with the Gain of two. We have 5V as a VREFP voltage, VCC and IOVCC is 3V3. The datasheet says, VREFN is 0V in case of gain of two, I am confused about it, I think that we need also a negative reference voltage -5V on REFN Input. Could you please check the configuration in the picture, is it correct? 
 
 Many thanks in advance. 
 Best Regards. 
 
 PS: I also found the application note CN-0318 with +10V/-10V with bipolar reference voltages (VREFP is 10V, VREFN is -10V).

iandal · Accepted Answer

Hi VL39 , 
 In the circuit you highlighted, with VREFN=0V, you would get an output span of -VREFP to VREFP. It is said to be x2 gain mode because it you got a span of x2 of VREFP while it is centered at 0V. 
 If you need +/-10V output range, you'd need the x2 gain mode configuration with a 10V VREFP input. 
 Best regards, 
 Ian)

iandal · Answer

Hi VL39 
 This should work fine now!

VL39 · Answer

Hi iandal, 
 many thanks for that, I've changed the VREFP voltage in the picture, do you think it's correct? 
 
 Best Regards VL39

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AD5760, gain of two, output span