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rf power measurement chip ADL5920? Any suggestions

Hi,

   I went through ADL5920 datasheet and need few clarifications

[1] how to interface ADL5920 with a generic chip [any given MicroController say low power ARM 40Mhz chip] to read the values output of the ADL5920?

"The detector output voltages, available at the VRMSF and VRMSR pins, are proportional to the forward and reflected power in dBm"

[2] How to measure power in specific band with FreqMin to FreqMax Range. How to input these values?

[3] Are there any other IC's with ADI which can do RF measurement in any given Freq Range and has a interface like I2C/SPI. Like all in one chip.

Thanks

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