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AFE7225: marine VHF wireless transceiver application

Part Number: AFE7225
Other Parts Discussed in Thread: ADC3224, DAC3174, ADS4249, AFE7070

Hello Guys,

Good day.

Is AFE7225 applicable for marine VHF wireless transceiver application for marine frequencies from 156 to 162 MHz? Or is there a better alternative?

Thanks in advance!


  • Art:

    The DAC samples up to 250 MSPS.  1st Nyquist zone is up to 125 MSPS.  It would be tricky to transmit at 156-162 MHz within the second Nyquist zone, but possible with a reduction in output power due to SINC roll-off.

    The ADC samples up to 125 MSPS.  The 156-162 MHz band falls into the ADC's 3rd Nyquist zone which is acceptable.  The analog BW of the device is over 500 MHz.

    If the goal is to use the AFE with a modulator or demodulator then it is perfectly suitable.  The AFE7225 is nice because it encompasses both DAC and ADC in one package. If a separate TX/RX solution is acceptable, then something like the DAC3174 operating up to 500 MSPS or the AFE7070 is good for the TX and something like the ADS4249 (250 MSPS) or the ADC3224 (125 MSPS) is good for the RX.