HDC2080: About DAP and GND

Liu Yang

Part Number: HDC2080

Hi Team,

The datasheet says "The DAP may be soldered to a floating pad on the board, but the board pad should NOT be connected to GND".

But in our board the pad have been connected to GND.

What kind of problem will occur?

Best Regards,

Tom Liu

over 3 years ago

0 Pavani Deepthi Tenneti over 3 years ago

TI__Expert 3270 points

Hi Tom,

Leaving the thermal pad floating can help minimize thermal mass for heater efficiency or for measuring accurate ambient temperature measurements.

Connecting the thermal pad to GND will prevent the necessary temp rise when the heater is powered on.

Regards,
Pavani Tenneti

0 Liu Yang over 3 years ago in reply to Pavani Deepthi Tenneti

TI__Expert 8755 points

Hi Pavani,

Thank you for your reply.

However I am not sure if I know your meaning.

Do you mean the DAP can be connected to GND?

Datasheet says DAP shouldn't be connected to GND so I just want to know the reason.

Best Regards,

Tom Liu

0 Pavani Deepthi Tenneti over 3 years ago in reply to Liu Yang

TI__Expert 3270 points

Hi Tom,

The DAP can be connected to GND but it will give you incorrect temperature measurements if you plan on using the heater. If you do not plan on using the heater, then your design should be okay.

Regards,
Pavani Tenneti

Sensors

Sensors forum

HDC2080: About DAP and GND