AD9777 View Datasheet(PDF) - Analog Devices
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AD9777 Datasheet PDF : 60 Pages
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AD9777
DIGITAL FILTER SPECIFICATIONS
Table 4. Half-Band Filter No. 1 (43 Coefficients)
Tap
Coefficient
1, 43
8
2, 42
0
3, 41
−29
4, 40
0
5, 39
67
6, 38
0
7, 37
−134
8, 36
0
9, 35
244
10, 34
0
11, 33
−414
12, 32
0
13, 31
673
14, 30
0
15, 29
−1,079
16, 28
0
17, 27
1,772
18, 26
0
19, 25
−3,280
20, 24
0
21, 23
10,364
22
16,384
Table 5. Half-Band Filter No. 2 (19 Coefficients)
Tap
Coefficient
1, 19
19
2, 18
0
3, 17
−120
4, 16
0
5, 15
438
6, 14
0
7, 13
−1,288
8, 12
0
9, 11
5,047
10
8,192
Table 6. Half-Band Filter No. 3 (11 Coefficients)
Tap
Coefficient
1, 11
7
2, 10
0
3, 9
−53
4, 8
0
5, 7
302
6
512
20
0
–20
–40
–60
–80
–100
–120
0
20
0
–20
–40
–60
–80
–100
–120
0
20
0
–20
–40
–60
–80
–100
–120
0
0.5
1.0
1.5
2.0
fOUT (NORMALIZED TO INPUT DATA RATE)
Figure 2. 2× Interpolating Filter Response
0.5
1.0
1.5
2.0
fOUT (NORMALIZED TO INPUT DATA RATE)
Figure 3. 4× Interpolating Filter Response
2
4
6
8
fOUT (NORMALIZED TO INPUT DATA RATE)
Figure 4. 8× Interpolating Filter Response
Rev. C | Page 8 of 60
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