Cirrus Logic CS4354 - 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.
(Note 11)
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
Response Plots” on page 20 .
Parameter Min Typ Max Unit
Single-Speed Mode - 48 kHz
Passband (Note 8) 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 (Note 9) 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 (Note 10) (Relative to 1 kHz) Fs = 44.1 kHz - - ±0.14 dB
Double-Speed Mode - 96 kHz
Passband (Note 8) 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 (Note 9) 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
Passband (Note 8) 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 (Note 9) 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