FAQ - Integrated RF ICs

AK2401A

Integrated RF Ics

[Q0453]
・Can TCXO frequencies other than 18.432MHz, 19, 2MHz be used?
A.
・They can be used. However, warn the following points.
・The characteristics of the standard channel filter will change because the cut off frequency of the filter is designed based on the recommended TCXO frequency.
・The operating time is changed by the amount of the TCXO frequency change about all specifications which describe the operating time in digital circuit. 
・The sampling rate of the ADC is related to the TCXO frequency.
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[Q0454]
・Can RSSI be analogue-output?
A.
・The analog output is not available. The RSSI data can be read back from the register or is output through the ADC serial interface.
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[Q0455]
・When the transient responses of analog output (AOUT_P and AOUT_N pins) or analog demodulated output (SMFOUT pin) are measured with Evaluation Board, the DC fluctuations are slow. Does the convergence speed of the DC offset seem to be a problem?
A.
・There is no problem. This is because a 10uF DC-cut capacitor is connected on Evaluation Board. Try measuring the front (IC side) of the DC-cut capacitor.
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