Hi, is there any measurement data available from Analog showing the m*RF +/- n*LO mixing product levels present at the I and Q outputs of the ADL5380 mixer, and ideally how these vary with frequency please?
Many thanks for any help!
A spur table for the ADL5380 is not available. A spur table is often included in a mixer datasheet but not for demods because the ADL5380 baseband outputs are at low frequencies. The baseband BW of the ADL5380 is less than 400 MHz. In addition, there is an RC roll off at the I/Q outputs which proivde a low pass filter response. As a result of this, the m*RF +/- n*LO terms are very low and is not of a concern.
Many thanks for the quick answer, and for explaining why spur tables are not included in demod datasheets.
Measurements on an ADL5380 eval board have shown that, for lower RF and LO frequencies, spur levels can still be non-trivial. For example, with LO = 500 MHz and RF = 510 MHz, the resulting (3*LO - RF) spur at 990 MHz is attenuated by the RC roll off by only ~10-15 dB, and still present <20 dB below (LO - RF) at the I and Q outputs.
Thanks for your help,
Retrieving data ...