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Posts: 8
Registered: ‎04-30-2015

Si5340 Si5341 Documentation Error

I noticed on pg 15 of ver. 0.95 of the reference manual (Si5341-40-RM.pdf) that 200 ohm diff input impedance is suggested for XA/XB inputs. I believe this is an error.

Posts: 63
Registered: ‎09-10-2014

Re: Si5340 Si5341 Documentation Error

Hi,

 

This applies if we provide an external CLOCK input to the crystal pins.

 

If you connect a CRYSTAL to the crystal pins, then you should follow the recommendations in

5.1.1 (on the same page in reference manual) and section 12 beginning at page 47.

 

Regards,

Hari

Posts: 7
Registered: ‎06-04-2014

Re: Si5340 Si5341 Documentation Error

You are right. The 100 ohm resistors should each be 50 ohms.

Thanks

Dennis

 

Posts: 8
Registered: ‎04-30-2015

Re: Si5340 Si5341 Documentation Error

Yes, I realise that. But for an ext diff i/p, impdedance is usually 100ohm.