DAC38J84: Output impedance to be matched to calculate trace width

sarojini ravi

Prodigy 120 points

Part Number: DAC38J84

Hi,

It is mentioned in datasheet of DAC38J84 IC that the output impedance of analog output as 300k ohms.

To calculate trace width should I match to 50 ohms or 100 ohms.

over 3 years ago

0 Kang Hsia over 3 years ago

TI__Guru* 78864 points

Hi,

You may refer to the datasheet and the following app note. the DAC output will need pull-down for the current source drivers. The trace width depends on your pull-down value

https://www.ti.com/lit/ug/slua647a/slua647a.pdf?ts=1654696461861&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FDAC3484

-Kang

Data converters

Data converters forum

DAC38J84: Output impedance to be matched to calculate trace width