cs5378 Cirrus Logic, Inc., cs5378 Datasheet - Page 47

• Manufacturer Part Number: cs5378
• Description: Low-power Single-channel Decimation Filter
• Manufacturer: Cirrus Logic, Inc.

DS639F1
Individual filter stage group delay (no IIR)
SINC1
SINC2
SINC3
FIR1
FIR2
Cumulative linear phase group delay (no IIR)
Output
FIR2
Word
Rate
4000
2000
1000
500
333
250
200
125
100
50
40
25
20
10
5
1
Stage 4
Stages 3,4
Stages 2,3,4
Stages 1,2,3,4
Stage 7
Stage 6
Stages 5,7
Stages 4,7
Stages 3,5,7
Stages 3,4,7
Stages 2,3,5,7
Stages 1,2,3,5,7
Coefficient Set 0
Coefficient Set 1
Coefficient Set 0
Coefficient Set 1
(SINC Filter
SINC Output
Group Delay
Input Rate)
168081.5
16841.5
33681.5
1425.5
1701.5
3401.5
4341.5
6801.5
8421.5
169.5
337.5
553.5
721.5
885.5
41.5
85.5
Table 15. SINC + FIR Group Delay
(SINC Filter
FIR1 Output
Group Delay
Input Rate)
Decimation
Ratios
1672081.5
167241.5
334481.5
13457.5
16741.5
33481.5
41941.5
66961.5
83621.5
1673.5
3345.5
5065.5
6737.5
8405.5
5,5,5,2,2
417.5
837.5
2,2,2,2
5,5,2,2
2,2,2
5,2,2
5,5,2
2,2
2,2
5,2
8
2
2
3
4
4
2
2
(SINC Filter
Number of
Coefficients
FIR2 Output
Group Delay
Input Rate)
17672081.5
17,17,17,6,7
1767241.5
3534481.5
141457.5
176741.5
353481.5
441941.5
706961.5
883621.5
17673.5
35345.5
53065.5
70737.5
88405.5
17,17,6,7
4417.5
8837.5
5,5,6,7
17,21,7
17,6,7
5,6,7
21,7
6,7
6,7
126
126
36
13
48
48
7
7
Group Delay
(Input Rate)
(FIR2 Output
FIR2 Output
Group Delay
Word Rate)
See Figure
See Figure
34.5117
34.5215
34.5186
34.5171
34.5479
34.5398
34.5334
34.5355
34.5198
34.5197
34.5267
34.5196
34.5165
34.5164
34.5164
34.5158
1310.5
133.0
260.5
17.5
19.0
40.0
25.0
50.5
23.5
62.5
3.0
8.5
3.0
6.0
8.5
CS5378
47