DAC7760: Usage of ISET-R

Nam, Dino

Part Number: DAC7760

Dear team,

I can see below at datasheet of DAC7760.

What is main function of ISET-R port? Is there any advantage using 15Kohm ISET-R instead of using the internal Rset resistor?

- The customer use DAC7760 for 0 to 10V voltage output and 0 to 24mA current output.

- There is no HART function at customer application.

Thank you.

over 1 year ago

0 Paul_Frost over 1 year ago

TI__Guru 53193 points

Lucas will take a look this.

0 Lucas Burnette over 1 year ago in reply to Paul_Frost

TI__Expert 4200 points

Hi,

In the Electrical Characteristics portion of the datasheet, there are different min/max error amounts for specific accuracy areas. Using a very-high precision external resistor may have less overall error than the internal resistor.

Since you mentioned there is no HART function, the circuit described in Section 9.1.2.2 is not relevant.

Let me know if there are any other questions!

Thanks,
Lucas

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DAC7760: Usage of ISET-R