ADS5296 Datasheet, PDF (85/104 Pages) Texas Instruments – 10-Bit, 200-MSPS, 4-Channel and 12-Bit, 80-MSPS, 8-Channel Analog-to-Digital Converter

ADS5296
www.ti.com
SBAS606A – MAY 2013 – REVISED MAY 2013
Predefined Coefficients
The built-in filter types (low pass, high pass, and band pass) use predefined coefficients. The frequency
response of the built-in filters is shown in Figure 98 and Figure 99.
The predefined coefficients for the decimate-by-2 and decimate-by-4 filters are listed in Table 59 and Table 60,
respectively.
20
Low-Pass
10
High-Pass
0
−10
−20
−30
−40
−50
−60
−70
−80
0
0.1
0.2
0.3
0.4
Normalized Frequency (f_IN/f_S)
0.5
G024
Figure 98. Filter Response (Decimate-by-2)
40
Low-Pass
30
Band-Pass 1
Band-Pass 2
20
High-Pass
10
0
−10
−20
−30
−40
−50
−60
−70
−80
0
0.1
0.2
0.3
0.4
Normalized Frequency (f_IN/f_S)
0.5
G025
Figure 99. Filter Response (Decimate-by-4)
Table 59. Predefined Coefficients for Decimate-by-2 Filters
COEFFICIENTS
h0
h1
h2
h3
h4
h5
h6
h7
h8
h9
h10
h11
LOW-PASS
3
0
5
1
–27
–2
73
3
–178
–4
636
1024
DECIMATE-BY-2 FILTERS
HIGH-PASS
–22
–65
–52
30
66
–35
–107
38
202
–41
–644
1061
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