About sensitive supply pins of DP83865

Satoshi

Guru 19645 points

Other Parts Discussed in Thread: DP83865

Please let me know about sensitive supply pins of DP83865 below.

（1000-base condition）

①If these line is unstable, is there any risk?

　For example, communication disconnect, Link fault, etc.

②About 1V8_AVDD2(98 pin) and 1V8_AVDD3(100 pin)

　Please let me know about supply current spec of these input pin.

Best regards,

Satoshi

over 9 years ago

0 Patrick OFarrell over 9 years ago

TI__Mastermind 31600 points

Satoshi,

Is this a new design or an existing design? For new designs, we would recommend a device from the DP83867 family.

Patrick

0 Satoshi over 9 years ago in reply to Patrick OFarrell

Guru 19645 points

Patrick-san

Thank you for reply.
This is an existing design.

Best regards,
Satoshi

0 Patrick OFarrell over 9 years ago in reply to Satoshi

TI__Mastermind 31600 points

Satoshi,

Noise on the sensitive supply pins can affect the receive functionality. The most likely impact of this would be bit errors in the receive data.

We do not have supply current data per pin. We only have data for the overall 1.8V supply domain.

Patrick

0 Satoshi over 9 years ago in reply to Patrick OFarrell

Guru 19645 points

Patrick-san

Thank you for information.

On the customer board, inductance putting on board to the distance of 5mm from the sensitive supply's line.
I'll request to customer improve the place of inductance.

Best regards,
Satoshi

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About sensitive supply pins of DP83865