cs5378 Cirrus Logic, Inc., cs5378 Datasheet - Page 54

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

DS639F1
IIR filters
IIR1 Coeff
Selection
IIR1 – Single stage, no decimation
IIR2 – Single stage, no decimation
IIR3 – Two stage, no decimation
0
1
2
3
4
1
Coefficient set 0: high-pass, corner 0.15% f
Coefficient set 1: high-pass, corner 0.30% f
Coefficient set 2: high-pass, corner 0.60% f
Coefficient set 3: high-pass, corner 0.90% f
Coefficient set 4: high-pass, corner 1.20% f
2
Coefficient set 0: high-pass, corner 0.15% f
Coefficient set 1: high-pass, corner 0.30% f
Coefficient set 2: high-pass, corner 0.60% f
Coefficient set 3: high-pass, corner 0.90% f
Coefficient set 4: high-pass, corner 1.20% f
3
(Combined IIR1 and IIR2 filter responses)
Coefficient set 0,0: high-pass, corner 0.20% f
Coefficient set 1,1: high-pass, corner 0.41% f
Coefficient set 2,2: high-pass, corner 0.82% f
Coefficient set 3,3: high-pass, corner 1.22% f
Coefficient set 4,4: high-pass, corner 1.63% f
st
nd
rd
order no decimation, 3 coefficients
order no decimation, 5 coefficients
order no decimation, 8 coefficients
IIR1
Corner
Frequency
0.15% f
0.30% f
0.60% f
0.90% f
1.20% f
s
s
s
s
s
Table 16. IIR Filter Characteristics
Figure 31. IIR Filter Stages
IIR2 Coeff
Selection
0
1
2
3
4
IIR2
Corner
Frequency
0.15% f
0.30% f
0.60% f
0.90% f
1.20% f
s
s
s
s
s
IIR3 Coeff
Selection
s
s
s
s
s
s
s
s
s
s
0,0
1,1
2,2
3,3
4,4
(3 Hz at 2000 SPS)
(3 Hz at 1000 SPS)
(3 Hz at 500 SPS)
(3 Hz at 333 SPS)
(3 Hz at 250 SPS)
(3 Hz at 2000 SPS)
(3 Hz at 1000 SPS)
(3 Hz at 500 SPS)
(3 Hz at 333 SPS)
(3 Hz at 250 SPS)
s
s
s
s
s
(4 Hz at 2000 SPS)
(4 Hz at 1000 SPS)
(4 Hz at 500 SPS)
(4 Hz at 333 SPS)
(4 Hz at 250 SPS)
IIR3
Corner
Frequency
0.2041% f
0.4074% f
0.8152% f
1.2222% f
1.6293% f
CS5378
s
s
s
s
s
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