About MM9Z1638 on KTZ1J638

[dws]

Hi all,

I have come across a problem about acquire temperature, I don't understand internal and external temperature sensor,

I need to buy a temperature sensor if I use external temperature acquisiton.

Please help me clarify above circuit and tell me CN1,CN2 and CN22 connect with what.

Thank you a lot

Dawei

[Q_man]

Dawei,

to connect an external temperature sensor the RT1 (populated with a fixed 10k Ohm resistor) has to be removed.

You can then connect an external temperature sensor (e.g. 10K Ohm Termistor from Murata NCP18XH103F03RB) between CN1 and CN22).

The CN2 is intended for external applied voltages, this would require to populate R6 and R3 (with the desired divider ratio) and to unpopulate R5.

The "dnp" in the schematics indicated the component is not populated.

Rgds

W.