CS4398
COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE
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.)
(See note 9.)
Fast Roll-Off
Parameter
Min
Typ
Max
Unit
Combined Digital and On-Chip Analog Filter Response - Single-Speed Mode - 48 kHz (Note 5)
Passband (Note 6)
to -0.01 dB corner
to -3 dB corner
0
0
-
-
-
-
.454
.499
+0.01
-
Fs
Fs
dB
Fs
dB
s
dB
dB
dB
Frequency Response 10 Hz to 20 kHz
StopBand
StopBand Attenuation
Group Delay
De-emphasis Error (Note 8)
(Relative to 1 kHz)
-0.01
0.547
102
(Note 7)
-
-
-
-
-
-
-
9.4/Fs
Fs = 32 kHz
Fs = 44.1 kHz
Fs = 48 kHz
-
-
-
±0.23
±0.14
±0.09
Combined Digital and On-Chip Analog Filter Response - Double-Speed Mode - 96 kHz (Note 5)
Passband (Note 6)
to -0.01 dB corner
to -3 dB corner
0
0
-
-
-
-
-
.430
.499
0.01
-
-
-
Fs
Fs
dB
Fs
dB
s
Frequency Response 10 Hz to 20 kHz
StopBand
StopBand Attenuation
Group Delay
-0.01
.583
80
(Note 7)
-
4.6/Fs
Combined Digital and On-Chip Analog Filter Response - Quad-Speed Mode - 192 kHz (Note 5)
Passband (Note 6)
to -0.01 dB corner
to -3 dB corner
0
0
-
-
-
-
-
.105
.490
0.01
-
-
-
Fs
Fs
dB
Fs
dB
s
Frequency Response 10 Hz to 20 kHz
StopBand
StopBand Attenuation
Group Delay
-0.01
.635
90
(Note 7)
-
4.7/Fs
4. Slow Roll-off interpolation filter is only available in Control Port mode.
5. Filter response is guaranteed by design.
6. Response is clock-dependent and will scale with Fs.
7. For Single-Speed Mode, the Measurement Bandwidth is from stopband to 3 Fs.
For 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.
8. De-emphasis is available only in Single-Speed Mode; Only 44.1 kHz De-emphasis is available in Stand-
Alone mode.
9. Amplitude vs. Frequency plots of this data are available in the “Appendix” on page 41.
10
DS568F1
CIRRUS [ CIRRUS LOGIC ]
