Datasheet

PGA870
www.ti.com SBOS436A –DECEMBER 2009–REVISED FEBRUARY 2011
Figure 57. FFT Plot of PGA870 (G = 20 dB) + Second-Order Bandpass Filter and ADS58C48 with
Single-Tone Input at 170 MHz
Figure 58. FFT Plot of PGA870 (G = –4 dB) + Second-Order Bandpass Filter and ADS58C48 with
Single-Tone Input at 170 MHz
Table 6. Analysis of FFT for PGA870 (G = 20 dB) + Second-Order Bandpass
Filter and ADS58C48 at 170 MHz vs Typical ADC Specifications
CONFIGURATION ADC INPUT SNR HD
2
HD
3
PGA870 +
Second-order
–1 dBFS 65 dBFS –89.7 dBc –90.8 dBc
Bandpass Filter
and ADS58C48
ADS58C48 Only
–1 dBFS 66.1 dBFS –82 dBc –80 dBc
(typ)
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