TMP461: D- Pin is connected to GND?

user1822511

Prodigy 20 points

Part Number: TMP461

D- is connected to GND internally? why the measured resistance between D- and Pin 6 is not zero, about 1ohm.

so if I connect D+ to D-, it have the same performance with only D+ connected to GND and D- Pin is NC?

over 3 years ago

0 David Vaseliou over 3 years ago

TI__Expert 6820 points

Hi,

If you connect the D+ and D- pin to each other you will not be able to measure a remote temperature value. If you are only using the TMP461 as a local temperature sensor, you will not see a loss of local temperature accuracy if you connect D+ and D- together or only D+ connected to GND and D- floating.

Thanks,

David

0 user1822511 over 3 years ago in reply to David Vaseliou

Prodigy 20 points

Hi David

Yes, no request for remote function.

please explain why the resistance between D- and GND is 1ohm ，while you confirmed D- is connected to GND internally.

Thanks

Peter

0 David Vaseliou over 3 years ago in reply to user1822511

TI__Expert 6820 points

Hi Peter,

There is parasitic resistance between the two pins which is probably what you are seeing.

Thanks,

David

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TMP461: D- Pin is connected to GND?