Datasheet

PGA870

SBOS436A –DECEMBER 2009–REVISED FEBRUARY 2011

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Figure 59 and Figure 60 show the FFT plots for the same second-order bandpass filter circuit with two-tone

inputs, with each tone at –7 dBFS and the PGA870 set to a gain of 20 dB. Figure 59 shows the FFT for two-tone

inputs at 160 MHz and 170 MHz. The third-order intermodulation distortion products at 150 MHz and 180 MHz

are less than –90 dBc, though the second-order intermodulation distortion product at 10 MHz is at –82 dBc.

Figure 60 shows the FFT for two-tone inputs at 168 MHz and 170 MHz. The near-in third-order intermodulation

products at 166 MHz and 172 MHz are less than –88 dBFS, and the highest spur is the second-order

intermodulation product at 2 MHz at –81 dBFS.

Figure 59. FFT Plot of PGA870 (G = 20 dB) + Second-Order Bandpass Filter and ADS58C48 with

Two-Tone Inputs at 160 MHz and 170 MHz

Figure 60. FFT Plot of PGA870 (G = 20 dB) + Second-Order Bandpass Filter and ADS58C48 with

Two-Tone Inputs at 168 MHz and 170 MHz

Product Folder Link(s): PGA870