ADS7828: Unused analog input

ttd

Part Number: ADS7828

Dear Technical Support Team,

Please tell me how to deal with unused analog input pin.

The current unused pins are:
-Shorted unused multiple pins together and input at intermediate potential with pull-up / pull-down by 10kΩ each between power supply voltage and GND.
･ Intermediate potential input in the same way for each unused pin

Fixed for each pin via a resistor?
Are all unused pins shorted and fixed via resistors?
Is this fixed intermediate potential correct?

Please teach me how to set unused pins for this device.

Best Regards,

ttd

over 4 years ago

0 Tom Hendrick over 4 years ago

TI__Guru**** 181461 points

Hi ttd,

Using a 10k to ground on the unused pins of the ADS7828 would be fine.

0 ttd over 4 years ago in reply to Tom Hendrick

Mastermind 8660 points

Hi Tom,

Thank you for your reply.

I don't use three analog input pin.

Then should I use 10k to ground on each unused pin?

Should all three channels be connected together to GND with a single 10kΩ?

Best Regards,

tdd

0 Tom Hendrick over 4 years ago in reply to ttd

TI__Guru**** 181461 points

Use individual resistors, that gives you an opportunity to use the channel down the road in case you need it.

Data converters

Data converters forum

ADS7828: Unused analog input