Datasheet

AD9773
Rev. D | Page 8 of 60
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 −1079
16, 28 0
17, 27 1772
18, 26 0
19, 25 −3280
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 −1288
8, 12 0
9, 11 5047
10 8192
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
–120
–100
–80
–60
–40
–20
0
20
ATTENUATION (dBFS)
f
OUT
(NORMALIZED TO INPUT DATA RATE)
0.50 1.0 1.5 2.0
02857-002
Figure 2. 2× Interpolating Filter Response
–120
–100
–80
–60
–40
–20
0
20
ATTENUATION (dBFS)
f
OUT
(NORMALIZED TO INPUT DATA RATE)
0.50 1.0 1.5 2.0
02857-003
Figure 3. 4× Interpolating Filter Response
–120
–100
–80
–60
–40
–20
0
20
ATTENUATION (dBFS)
f
OUT
(NORMALIZED TO INPUT DATA RATE)
2046
02857-004
8
Figure 4. 8× Interpolating Filter Response