How to generate a 20Mhz Clock Sognal For ADC

[jitun2]

I want to use the HI1175 ADC from Intersil for my project but it needs an external clock of 20MHz for its operation. I need a simple circuit that will generate a 20MHz clock signal. Preferably an XTAL based circuit. An comment and/or suggestion are welcome. Please reply.

 

[kchriste]

One of these should work:
https://www.electro-tech-online.com/custompdfs/2008/02/ecs_100.pdf
https://www.electro-tech-online.com/custompdfs/2008/02/ecs-300cx.pdf
etc...

 

[jitun2]

where can I get one of these? These are not available here. Can you please suggest a simple circuit

 

[eblc1388]

They are very common. It doesn't has to be the exact model. Most 20MHz crystal oscillator module will work if it is for the specified supply voltage.

Just ask your component shop for a 20MHz crystal oscillator module in a rectangular shinny tin can package that has four(not two or three) legs.

 

[blueroomelectronics]

where can I get one of these? These are not available here. Can you please suggest a simple circuit

If you fill in your location we would know where you are and perhaps someone local to you may know a source.

 

[jitun2]

Sorry I will fill in my location Now. Btw I am from India, Orissa, Bhubaneswar. And I just came searching all the market for this component but could not fine it.

 

[blueroomelectronics]

Do you have a 20MHz crystal?

 

[jitun2]

I have a lot of those 20Mhz crystals

 

[blueroomelectronics]

One of these might work, also a CD4049 is a popular choice.
**broken link removed**

 

[jitun2]

Thanks for the link.

I just wanted to ask
I have a 7555 RC timer IC. Can I use it as a clock source for the ADC.

 

[Nigel Goodwin]

Thanks for the link.

I just wanted to ask
I have a 7555 RC timer IC. Can I use it as a clock source for the ADC.

Not at 20MHz.

 

[blueroomelectronics]

I don't think the 7555 will go to 20MHz, would be very inaccurate anyway.

Edit: didn't MSTECHCA get one running at 15MHz (really I remember that thread)