Hello,
In the datasheet page 5 , there is the Baseband Inputs specification 1dB input frequency bandwidth.
I have some questions for this specification
(1)
Could you please share the frequency response figure of Baseband inputs?
(2)
Could you please let me know the measurement set up?
Since the BB input is Hi-Z, did you use FET probe for measurement?
Also, is this BW specification differential or single end input ?
Best Regards,
Ryuji
Hello Ryuji,
Referencing the TI Design 00335, the data measurements of the baseband bandwidth response are shown below.
Due to the sampling rate of the DAC in the TI Design, an anti-aliasing low pass filter was used in the baseband input network. The reason for the filter with a cutoff frequency at roughly 550 MHz, was to eliminate the unwanted images from the DAC. Although not the entire 1GHz bandwidth is shown, the data is still a good representation of the frequency response for the baseband inputs at various LO frequencies.
I recommend looking more into the TI design to learn more about the set-up itself and how the data was collected.
Regards,
Oscar
