NHS3152/A1Z (Reverse) pin Definition

[kelvin_hasseler]

The NH3152 Therapy Adherence Board connect the NHS3152/A1Z pin 10 to GND and labels it CE.  But the Datasheet indicates pin 10 for this package is a (reserved) pin.  I was looking in the datasheet and user manual no information was found if the pin can be floated or should be connected to GND?

[weidong_sun]

Hello Kelvin,

   Download um10876.pdf(NHS31xx User manual)， please!

NHS3152: NTAG SmartSensor with Temperature Sensor, Digital and Analog IOs | NXP 

Then you will see the comment on the pin , like below:

Hope the information is helpful for you!

Have a nice day!

BR,

Weidong

[kelvin_hasseler]

Thank you

Kelvin

[driesmoors]

Hi Weidong, Hello Kelvin,

Actually, [2] only refers to the pads that carry the analog signals in the NHS3152 IC. The comment does not apply to pad 10.

The reserved pin has an internal weak pull-down, and can be left floating or tied to ground. The PCB designer(s) of our test boards always tie it to ground, to ensure the pin can never be high.

So the end recommendation stays the same: it is best to tie it to ground.

Best regards,
Dries.

[weidong_sun]

ok, Dries Moors, Got it!

Thanks a lot !

Have a nice day!

BR,

weidong

[kelvin_hasseler]

Thank you