DAC8760: DAC8760 reference design circuit problem

wang jingang

Part Number: DAC8760
Other Parts Discussed in Thread: OPA188,

hello！

Please tell me, DAC8760 reference design recommended circuit, voltage and current output are connected together, OPA188A needs to be added in Vsense+. If the output voltage and current are separated and not connected together, can OPA188 be removed?

over 6 years ago

0 Garrett Satterfield over 6 years ago

TI__Expert 5820 points

Hi Wang,

Yes, a buffer is required into the +VSENSE feedback pin. There is an internal 60kOhm resistor on +VSENSE that will cause leakage in current output mode if unbuffered. This will result in current output error. See the TI Reference Design linked below for design details when buffering +VSENSE.

http://www.ti.com/lit/ug/slau519/slau519.pdf

Thanks,
Garrett

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DAC8760: DAC8760 reference design circuit problem