ISL5216_07 Datasheet, PDF (56/65 Pages) Intersil Corporation – Four-Channel Programmable Digital Downconverter

ISL5216
ROMd FIR Filters - Response Curves (Continued)
0
-20
-40
-60
-80
-100
-120
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
FREQUENCY (RELATIVE TO f_S)
NOTE: There is a 65dB limitation in SNR using the Re-Sampler Filter.
FIGURE 18. POLYPHASE RESAMPLER FILTER BROADBAND
FREQUENCY RESPONSE
10
0
-10
-20
-30
-40
-50
-60
-70
-80
0
FREQUENCY (RELATIVE TO f_S)
FIGURE 19. POLYPHASE RESAMPLER FILTER PASS BAND
FREQUENCY RESPONSE
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
FREQUENCY (RELATIVE TO f_S)
FIGURE 20. POLYPHASE RESAMPLER FILTER EXPANDED RESOLUTION PASSBAND FREQUENCY RESPONSE
56
FN6013.3
July 13, 2007