Datasheet

ADS1281
www.ti.com SBAS378D –AUGUST 2007–REVISED JUNE 2010
APPENDIX
Table 24. FIR Stage Coefficients
SESSION 1 SESSION 2 SESSION 3 SESSION 4
Scaling = 134217728 Scaling = 134217728
LINEAR PHASE
LINEAR PHASE SCALING = LINEAR LINEAR
COEFFICIENT SCALING = 1/512 1/8388608 PHASE MINIMUM PHASE PHASE MINIMUM PHASE
b
0
3 –10944 0 819 –132 11767
b
1
0 0 0 8211 –432 133882
b
2
–25 103807 –73 44880 –75 769961
b
3
0 0 –874 174712 2481 2940447
b
4
150 –507903 –4648 536821 6692 8262605
b
5
256 0 –16147 1372637 7419 17902757
b
6
150 2512192 –41280 3012996 –266 30428735
b
7
0 4194304 –80934 5788605 –10663 40215494
b
8
–25 2512192 –120064 9852286 –8280 39260213
b
9
0 0 –118690 14957445 10620 23325925
b
10
3 –507903 –18203 20301435 22008 –1757787
b
11
0 224751 24569234 348 –21028126
b
12
103807 580196 26260385 –34123 –21293602
b
13
0 893263 24247577 –25549 –3886901
b
14
–10944 891396 18356231 33460 14396783
b
15
293598 9668991 61387 16314388
b
16
–987253 327749 –7546 1518875
b
17
–2635779 –7171917 –94192 –12979500
b
18
–3860322 –10926627 –50629 –11506007
b
19
–3572512 –10379094 101135 2769794
b
20
–822573 –6505618 134826 12195551
b
21
4669054 –1333678 –56626 6103823
b
22
12153698 2972773 –220104 –6709466
b
23
19911100 5006366 –56082 –9882714
b
24
25779390 4566808 263758 –353347
b
25
27966862 2505652 231231 8629331
b
26
25779390 126331 –215231 5597927
b
27
19911100 –1496514 –430178 –4389168
b
28
12153698 –1933830 34715 –7594158
b
29
4669054 –1410695 580424 –428064
b
30
–822573 –502731 283878 6566217
b
31
–3572512 245330 –588382 4024593
b
32
–3860322 565174 –693209 –3679749
b
33
–2635779 492084 366118 –5572954
b
34
–987253 231656 1084786 332589
b
35
293598 –9196 132893 5136333
b
36
891396 –125456 –1300087 2351253
b
37
893263 –122207 –878642 –3357202
b
38
580196 –61813 1162189 –3767666
b
39
224751 –4445 1741565 1087392
b
40
–18203 22484 –522533 3847821
b
41
–118690 22245 –2490395 919792
b
42
–120064 10775 –688945 –2918303
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