DAC ADA 4817-2 with dual amplifier (Differential input to single ended output), Is there any way to keep it positive only?

Hi,

Can you share your schematic so we could try it on our end?

Thanks,

Mae

Website Link- EVAL-AD9106 Evaluation Board | Analog Devices

1)See into Documents & Resources section

2)In above section Schematic is in Zip format.

3) In Zip format refer PDF No.2, page No.3.

Thank You.

Mahadev Pawase

Hello 

I added schematics for the reference.

I just want to confirm if my understanding is correct, you want a differential input of a 1Vpp with a DC offset of 0.5V, hence a 0 to 1V sinewave, and a sinewave output of 0 to 3V, is that right?

 0-1V(Sine wave or any other waveform) input (P & N inputs have 180 degree phase shift) 0.5V offset voltage  is there  and output need from ADA4817-2 is  0-3V full scale output at positive side only.

Hi Mahadev1988 ,

The large signal bandwidth of the ADA4817-2 is limited to around ~200MHz (G=1) but based from the schematic that you sent you are using 1GHz inputs with G=3.

Can you give more details regarding the application? Will you be using 1GHz inputs in your actual application?

Can you also show where is "V(n008)" in your schematic? Thanks.

Best regards,

Gio

f=1MHz, Please refer DAC 2 Schematic.

Thanks 

Regards

Mahadev

Hi Mahadev,

Is the 0-1V input a differential input or is it the input for each input pins? 

Thanks,

Mae

Yes Madam, we used both inputs.

Non inverting input is in Green color

Inverting input is in Red color.

We have both positive and negative inputs and single ended output of ADA4817-2 ic, contains two opamps

we used two ADA4817-2 ics in project.

AD9106 DAC has 8 output signals for four opamps(Means  each ADA4817-2 ic contains two opamps, likewise we used two ADA 4817-2 ics, total 4 amplifiers are in action with 8 inputs from AD9106DAC)

I given one opamp(we used both inputs) sample case, if this case we get solution then same solution will be applied on other opamps also.

Thanks,

Regards

Mahadev.

Hi Mahadev1988 

If you offset your non-inverting input to 1V using a voltage divider then you will be able to achieve 0 to 3V output at G=2.

Regards,

Gio