Unused inputs on the TLC542 ADC

AmandaD

Should unused input pins on the TLC542 ADC be pulled to one of the supply rails? Are resistors needed or can the pins be directly connected to either rail?

I'm assuming that floating inputs may have problems with noise.

Thanks,

Amanda

over 14 years ago

0 Tom Hendrick over 14 years ago

TI__Guru**** 181371 points

Hi Amanda,

My suggestion for the unused inputs to the TLC542 would be to tie them to ground via a resistor - this would then give you the option to use that input sometime down the road. If cost is a sensitive issue, you can simply tie the unused inputs to ground directly.

0 AmandaD over 14 years ago in reply to Tom Hendrick

Prodigy 140 points

Thanks Tom.

I'll get my schematic updated now. :o)

Amanda

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Unused inputs on the TLC542 ADC