crystal value for wireless transmitter
crystal value for wireless transmitter
(OP)
Hi,
I need to use a 13.125MHz crystal for the AT86RF401 transmitter from ATMEL and I would like to know if this value must be respected exactely or can be changed, because I only found a 13.0625 MHz crystal.
Thanks
I need to use a 13.125MHz crystal for the AT86RF401 transmitter from ATMEL and I would like to know if this value must be respected exactely or can be changed, because I only found a 13.0625 MHz crystal.
Thanks





RE: crystal value for wireless transmitter
TTFN
RE: crystal value for wireless transmitter
RE: crystal value for wireless transmitter
The specification of the receiver
The frequency range you may operate
Cost and space limitations
It is possible to generate an other frequency from a crystal several ways (dividing/mixing/frequency synthetizers).
<nbucska@pcperipherals.com>
RE: crystal value for wireless transmitter
TTFN
RE: crystal value for wireless transmitter
RE: crystal value for wireless transmitter
From page 9 of the datasheet:
The crystal oscillator circuit is designed to work with crystals with fundamental frequen-cies between 11 and 19 MHz. Forty pF of internal capacitance is connected between each of the crystal input pins and (chip) ground. Alternatively, an external clock can be used for these functions.
The app note for the evaluation board indicates that you need a 20ppm crystal.
TTFN
RE: crystal value for wireless transmitter
Thank you for your help !
RE: crystal value for wireless transmitter
RE: crystal value for wireless transmitter
TTFN
RE: crystal value for wireless transmitter
As I wrote, you must check the receiver, too and make sure
it can receive the transmitted signal.
<nbucska@pcperipherals.com>
RE: crystal value for wireless transmitter