PGA870 Datasheet, PDF (27/39 Pages) Texas Instruments – High-Speed, Fully Differential, Programmable-Gain Amplifier

PGA870
www.ti.com
SBOS436A – DECEMBER 2009 – REVISED FEBRUARY 2011
Figure 54 and Figure 55 each show the FFT plots for the same first-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 54 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 –86 dBc. Figure 55 shows the FFT for two-tone inputs at 168 MHz and 170 MHz. The highest spur
is the third-order intermodulation product at 172 MHz at –85 dBFS.
Figure 54. FFT Plot of PGA870 (G = 20 dB) + First-Order Bandpass Filter and ADS58C48 with Two-Tone
Inputs at 160 MHz and 170 MHz
Figure 55. FFT Plot of PGA870 (G = 20 dB) + First-Order Bandpass Filter and ADS58C48 with Two-Tone
Inputs at 168 MHz and 170 MHz
© 2009–2011, Texas Instruments Incorporated
27
Product Folder Link(s): PGA870