DS90C031QML: Unused input and output pins

Mir

Intellectual 485 points

Part Number: DS90C031QML

Hi,

I am using only one of the four channels of this device.

What should be done for the unused input and output pins for the other channels?

Thanks in advance.

over 7 years ago

0 Wade Vonbergen over 7 years ago

TI__Guru 62930 points

Mir,
You can simply tie the unused inputs low (or high) and leave the unused differential outputs disconnected.

If this answers your question, please click "Verify it as the answer"
Regards,
Wade

0 Mir over 7 years ago in reply to Wade Vonbergen

Intellectual 485 points

Hi sir,

Thanks for the reply.

What happens if the unused inputs are left floating?

Regards..

0 Wade Vonbergen over 7 years ago in reply to Mir

TI__Guru 62930 points

They can potentially oscillate, causing excessive current and noise.
See this app note for more information: www.ti.com/.../getliterature.tsp

Regards,
Wade

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DS90C031QML: Unused input and output pins