TSC2046: VREF and AUX

na na78

Guru 16770 points

Our customer have following questions.
Could you please answer them?

1.
They implement differential reference mode and external AUX is not used.

How to terminate VREF pin and AUX pin?
(Open, connect to GND, etc?)

2.
If VREF and AUX is open, could it be led to something fault?

I appreciate if you can reply as soon as possible.

BestRegards

over 6 years ago

0 na na78 over 6 years ago

Guru 16770 points

Hi

I believe that VREF is open and AUX is connected to GND would be OK.

VREF : According to Figure 1 of datasheet, VREF is open.
AUX : I referred following application report.
"Connect the analog input pin AUX (or AUX IN, or IN), or VBAT to ground if not used"
www.tij.co.jp/.../slaa560.pdf

Is my understanding correct?

Could you please give us your view?

BestRegards

0 Aaron Estrada over 6 years ago in reply to na na78

TI__Mastermind 22950 points

Hello,

Sorry for the delayed response.

Both of your understandings are correct. I was going to direct you to the information on the PCB layout report that you linked.

Regards

Aaron

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TSC2046: VREF and AUX