About FDC1004 Sensor Reference GND is Necessary Need ?

Kuo Nowal

Other Parts Discussed in Thread: FDC1004

Hi Sir,

May I know FDC1004 Sensor reference GND is necessary need? Since looks schematic is different with soft PCB(GND is floating).

Schematic

Liquid Level Sensing Sensor Reference Design

over 8 years ago

0 Rachel Liao over 8 years ago

TI__Expert 6480 points

Hi Kuo,

No, that ground is not necessary for your sensor design.

Thanks,
Rachel

0 Kuo Nowal over 8 years ago in reply to Rachel Liao

Expert 2315 points

Hi Sir,

If no reference GND need, how about guarantee our solution is " No Reference GND Need".
customer concern our reference design GND pin is floating, compare competitor also need reference GND.

Question no GND reference affect sampling value...

0 Rachel Liao over 8 years ago in reply to Kuo Nowal

TI__Expert 6480 points

Hi Kuo,

The Liquid Level Sensing Sensor Reference Design is a differential measurement referenced to CIN4. Please take a look at this app note for further information.

Thanks,

Rachel

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About FDC1004 Sensor Reference GND is Necessary Need ?