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Decimation is a powerful way of improving the SNR, SINAD, and ENOB.
details a sample of typical results with the AMS101 evaluation card connected to various
base boards.
Table 4-2: AMS101 Evaluation Card Typical Results with Multiple Base Boards
X-Ref Target - Figure 4-9
AMS101 Evaluation Card User Guide
UG886 (v1.3) November 6, 2013
Effective Number of Bits (ENOB)
Base Board
Decimation = 1 Decimation = 16 Decimation = 1 Decimation = 16
ZC706
10.6
AC701
10.4
VC707
10.4
ZedBoard
10.4
KC705
10.3
ZC702
10.4
XADC
Data
Figure 4-9: Decimation Block Diagram
www.xilinx.com
12.3
11.9
11.5
11.5
11.3
11.2
Decimate = 1
Half-Band
Decimate
FIR Filter
Loop Back to Get a Further Decimate by 2
AMS Demonstration
Figure 4-2
Signal to Noise Ratio (SNR, dB)
65.8
76.6
64.8
75.1
65.3
74.5
65.1
74.4
64.6
73.3
65.1
71.7
by 2
UG886_c4_09_062512
45
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