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Q&A Selecting oscillator ADV7280A-M

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Selecting oscillator ADV7280A-M

Shmuel.ili

on Oct 3, 2022

Category: Hardware

Product Number: ADV7280A-M

Hi,
I'm using ABM11-28.63636MHZ-D2X-T3 as the ADV7280A-M oscillator.
Is this oscillator fit the device requirments?
BR
Shmuel

Tags: hardware ADV7280A-M

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0 FormerMember

on Oct 3, 2022 10:54 AM

Tolerance is good. The schematics normally use a 30Ohm crystal. You may have to tweak the load caps or change to a low series resistance crystal.

0 Shmuel.ili

on Oct 3, 2022 11:04 AM in reply to FormerMember

Hi,

At the ABM11-28.63636MHZ-D2X-T3 data sheet the ESR is 100 ohm. Is it OK?

What's the load caps and series resistance values?

BR

Shmuel

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0 Shmuel.ili
on Oct 3, 2022 11:04 AM in reply to FormerMember
Hi,

At the ABM11-28.63636MHZ-D2X-T3 data sheet the ESR is 100 ohm. Is it OK?

What's the load caps and series resistance values?

BR

Shmuel
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0 FormerMember

on Oct 3, 2022 12:06 PM in reply to Shmuel.ili

The goal is to get the crystal to spin and maintain tolerance over temp. Here's an app note on our video crystal oscillators.

0 Shmuel.ili

on Oct 6, 2022 3:05 AM in reply to FormerMember

Hi,

I didn't understand. Can I use ESR 100ohm for the ADV7280A-M?

BR

Shmuel

+1 FormerMember on Oct 6, 2022 9:15 AM in reply to Shmuel.ili

The 100 Ohm part may work but you will probably have to change the load caps. You can only 100% verify what the new load caps are when you have the final board to test with.