In case of Parallel mode what termination is required to RFBUFEN pin? Because RF output is set to +3dBm when in Parallel Mode, RFBUFEN pin does nothing I think.
The RFBUFEN input (pin 30) should be driven with a valid "0" or "1" CMOS level. By default when RFBUFEN="1" the CML output (RFOUTP/N) is enabled. The PMODE-SEL="1" input enables parallel mode. In this mode the three SPI signals (SCK, SDI, and SEN) are decoded to enable/disable the 8 LVPECL outputs as shown on page 14 of the datasheet. Parallel mode also sets the CML output gain to a constant 3dBm.
In parallel mode is RFBUFEN (pin 30) still functional? Does RFBUFEN (pin 30) enable/disable output of RFOUTP/N in parallel mode?
If RFBUFEN (pin 30) is not functional in parallel mode, what termination is recommended to RFBUFEN (pin 30), Open, GND or xx ohm termination?
When in parallel mode the RFBUFEN pin is still functional. If this pin is CMOS '0' the RF Buffer is disabled and if '1' it is enabled.
Thanks a lot. I's been clear. I have no question any more.
Retrieving data ...