AMIS-53050 Datasheet, PDF (21/107 Pages) AMI SEMICONDUCTOR – Frequency Agile Transceiver

AMIS-53050 Frequency Agile Transceiver
Data Sheet
Figure 9: Receiver LNA Output Inductor Selection
5.2.2. IF Filter
A passive poly-phase filter and active filtering are used to achieve frequency selectivity and rejection of the image frequency. The filter
is designed to provide an optimal image rejection of 50dB at 500kHz below the RF frequency.
5.2.3. Data Filter
The OOK low-pass data filter is used for additional post-detection signal filtering in accordance with the OOK signal data rate (1.2, 1.8,
2.4, 4.8, 7.2, 9.6, 14.4, 19.2kHz).
5.3 Transmitter
The transmitter is a two-stage output amplifier. When both stages are selected, the highest output power at frequencies from 300MHz
to 960MHz is +15dBm, when matched into a 50Ω load. For output power levels up to 0dBm, single stage operation results in higher
power efficiency, as compared to two stage operation. The voltage output level on the RFPWR pin controls the RF output power level of
the device. A DC connection must be made between the RFOUT pin and the RFPWR pin. The non-linear output of the AMIS-53050
may require external components to match to a load and to reduce the spurious harmonics.
The output impedance of the AMIS-53050 can be matched to the impedance of an external load, using the spreadsheet AMIS-
53RFMATCH.xls. This spreadsheet is provided by AMIS and is described in the Application Note “AMIS-53XXX Antenna Impedance
Matching Considerations”.
AMI Semiconductor – Jan. 07, M-20639-002
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