DAC8820: DAC8820ICDBR

LAKSHMI PRIYA C

Intellectual 260 points

Part Number: DAC8820

For the part DAC8820ICDBR, kindly let me know how to control offset using Rofs pin and a trim part.

over 3 years ago

0 Akhilesh K over 3 years ago

TI__Mastermind 19096 points

Hi,

Rofs pin is used for operating the DAC in 4 quadrant operation. By connecting Rofs to Vref, users can generate voltages from -Vref to Vref.

If you connect Rofs to some other voltage using trim pots, transfer function of the DAC will change and no longer operates in 4 quadrant mode.

Whats is the ouput voltage you are looking at?

Regards,

0 LAKSHMI PRIYA C over 3 years ago in reply to Akhilesh K

Intellectual 260 points

We need to adjust offset which may change due to temperature. For that we are planning to use Rofs pin. Our application is -10 to 10 V

0 Akhilesh K over 3 years ago in reply to LAKSHMI PRIYA C

TI__Mastermind 19096 points

Hi,

For -10V to +10V operation, you definitely need to connect Rofs pin to Vref as mentioned in the datasheet application diagrams. For offset adjustment, you can use a second stage operational amplifier with trim pot.

Regards,

Data converters

Data converters forum

DAC8820: DAC8820ICDBR