[SOLVED] How to terminate unused Touch sensor pin - TTP224

[papaisou11]

Hi all,
I am not sure if it is the correct place to post, as it is analog circuit, I thought here to post it.

I am designing a circuit where 3 capacitive touch input is required. I found TTP224 is reasonable for me. However, the problem is It has 4 Touch input. Can any one suggest me what is the best way to terminate the fourth touch input? I found that if I leave it floating, it is in most sensitive condition. I am thinking to use the high rated capacitor of 100pF with GND to terminate it. Is this right process to do it?

Thanks to all.

 

[KlausST]

Hi,

link to datasheet?

Klaus

 

[papaisou11]

Kindly have the link to datasheet -

Tontek Design Tech TTP224C-BSBN Datasheet

TTP224C-BSBN Tontek Design Tech $0.2943 - SSOP-16-150mil Touch Screen Controllers ROHS datasheet, price, inventory C2890350

www.lcsc.com

 

[KlausST]

Hi,

not explicitely mentioned...

I´d omit the pad ... and set the senstivity to minimal

Klaus

 

[papaisou11]

Thanks. Lets close this thread by accepting your answer.