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ADF4158: max FSK data rate, min sweep time

Question asked by Wolfgang on Mar 29, 2011
Latest reply on Mar 30, 2011 by Wolfgang



I am investigating the ADF4158 PLL for a new design, but was not able to deduce the following form the data sheet:


I need a linear frequency sweep with a duration of approx. 500-600 microseconds, with max number of steps (256 ?) over a 2.5 % relative bandwidth. The PLL doesn't need to lock during this short sweep, but should still generate a linear ramp. Is this possible ?


Also, when not sweeping, I want to transmit FSK data at a fixed center frequency, or PSK, if this allows a higher data rate. What is the maximum data rate in both cases ? I am aiming for about 500 kbit/s.