Which is the smallest external crystal oscillator available?

[vinodstanur]

Hi,
I want to design a circuit in which the size should be as small as possible. Can u suggest the smallest available crystal oscillator to be connected on an atmega microcontroller...?

 

[FvM]

Did you consider to visit a crystal manufacturer website, e.g. www.abracon.com

A 16 MHz crystal can be as small as 2.5x2.0 mm SMD package.

 

[keith1200rs]

Or 1.6mm x 1.2mm? http://www.tfc.co.uk/pdfs/FCXO-07.pdf

Keith

 

[FvM]

Or 1.6mm x 1.2mm? http://www.tfc.co.uk/pdfs/FCXO-07.pdf

Yes, if 3.3V power supply is suitable.

 

[vinodstanur]

Or 1.6mm x 1.2mm? http://www.tfc.co.uk/pdfs/FCXO-07.pdf
Keith

Hi,
what will be the advantage of this one and compared to a two terminal resonator?
Can I get a tiny cheap resonator?

 

[FvM]

I guess you know the difference between a crystal (passive) and a crystal oscillator (active device), otherwise review the datasheets. An ATmega can use both, if configured respectively.

Because most microprocessors have a built-in oscillator circuit, they are usually operated with crystals, in other words simple resonators. Ceramic resonators (sligthy cheaper but less accurate) can be used too, but aren't small.

 

[vinodstanur]

I guess you know the difference between a crystal (passive) and a crystal oscillator (active device), otherwise review the datasheets. An ATmega can use both, if configured respectively.

Because most microprocessors have a built-in oscillator circuit, they are usually operated with crystals, in other words simple resonators. Ceramic resonators (sligthy cheaper but less accurate) can be used too, but aren't small.

Yup I know..
So since ceramic resonators aren't small I should go for external oscillator right? Also in arduino mega board I have seen a very very small oscillator, but I didn't checked if it is an active or passive one...

 

[FvM]

I would go for a SMD crystal like https://www.abracon.com/Resonators/ABM10.pdf