Cirrus Logic CS4354 User Manual
Page 7
DS895F2
7
CS4354
COMBINED DIGITAL AND ON-CHIP ANALOG FILTER CHARACTERISTICS
The filter characteristics have been normalized to the sample rate (Fs) and can be referenced to the desired sam-
ple rate by multiplying the given characteristic by Fs. Reference level (0 dB) is set at 997 Hz.
Notes: 8.
Response is clock-dependent and will scale with Fs.
9.
For Single- and Double-Speed Mode, the Measurement Bandwidth is from stopband to 3 Fs.
For Quad-Speed Mode, the Measurement Bandwidth is from stopband to 1.34 Fs.
10. De-emphasis is available only in Single-Speed Mode.
11. Amplitude vs. frequency plots of this data are available in
“Combined Digital and On-chip Analog Filter
Parameter
Min Typ
Max
Unit
Single-Speed Mode - 48 kHz
to -0.05 dB corner
to -3 dB corner
1.796•10
-4
1.947•10
-5
-
-
0.470
0.500
Fs
Fs
Frequency response 20 Hz to 20 kHz
-0.05
-
+0.05
dB
Stopband
0.550
-
-
Fs
Stopband attenuation
80 dB
-
-
dB
High-pass filter settling time (input signal goes to 95% of its final value)
-
2.452•10
4
/Fs
-
s
Total group delay
-
9.4/Fs
-
s
De-emphasis error
(Relative to 1 kHz)
Fs = 44.1 kHz
-
-
±0.14
dB
Double-Speed Mode - 96 kHz
to -0.05 dB corner
to -3 dB corner
8.980•10
-5
9.736•10
-6
-
-
0.290
0.500
Fs
Fs
Frequency response 20 Hz to 20 kHz
-0.05
-
+0.05
dB
Stopband
0.583
-
-
Fs
Stopband attenuation
82 dB
-
-
dB
High-pass filter settling time (input signal goes to 95% of its final value)
-
4.903•10
4
/Fs
-
s
Total group delay
-
7.0/Fs
-
s
Quad-Speed Mode - 192 kHz
to -0.05 dB corner
to -3 dB corner
4.490•10
-5
4.868•10
-6
-
-
0.253
0.486
Fs
Fs
Frequency response 20 Hz to 20 kHz
-0.05
-
+0.05
dB
Stopband
0.630
-
-
Fs
Stopband attenuation
85 dB
-
-
dB
High-pass filter settling time (input signal goes to 95% of its final value)
-
9.807•10
4
/Fs
-
s
Total group delay
-
4.9/Fs
-
s