DAC8760: DAC8760IPWPR at 0 DAC counts is outputting 10mV when it should be outputting 0V

Joe Ringrose

Part Number: DAC8760

I'm having an issue where the part DAC8760IPWPR at 0 DAC counts is outputting 10mV when it should be outputting 0V. Does anyone know why this is and how to correct it?

over 2 years ago

+1 Lucas Burnette over 2 years ago

TI__Expert 4590 points

Hi,

Can you provide a schematic of your circuit and also describe what output mode you are using?

Thanks,
Lucas

0 Joe Ringrose over 2 years ago in reply to Lucas Burnette

Prodigy 20 points

The analogue supply is unipolar:

+12V on AVDD

0V on AVSS

0 Joe Ringrose over 2 years ago in reply to Joe Ringrose

Prodigy 20 points

0 Joe Ringrose over 2 years ago in reply to Lucas Burnette

Prodigy 20 points

0 Lucas Burnette over 2 years ago in reply to Joe Ringrose

TI__Expert 4590 points

Hi,

It looks like you clicked that your thread was resolved. Was this the case or are you still experiencing the 10 mV output?

Thanks,
Lucas

0 Joe Ringrose over 2 years ago in reply to Lucas Burnette

Prodigy 20 points

No, I’m still have the issues

0 Lucas Burnette over 2 years ago in reply to Joe Ringrose

TI__Expert 4590 points

Hi,

One issue I noticed with your schematic is that you should also have a 100 pF CAP from the CMP pin to GND, since C29 is larger than 470 pF. Also, for IOUT, you do not need a ferrite bead and can replace it with a 15 ohm RES.

Can you give me more details into what SPI commands you are writing to the DAC?

Thanks,
Lucas

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DAC8760: DAC8760IPWPR at 0 DAC counts is outputting 10mV when it should be outputting 0V