Cirrus Logic CS4365 User Manual
Page 12
12
DS670F2
CS4365
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
.
Notes:
8.
Slow roll-off interpolation filter is only available in Software Mode.
9.
Response is clock-dependent and will scale with Fs.
10. 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.
11. De-emphasis is available only in Single-Speed Mode; only 44.1 kHz De-emphasis is available in Hard-
ware Mode.
12. Amplitude vs. Frequency plots of this data are available in
Section 7. “Filter Plots” on page 45
Parameter
Fast Roll-Off
Unit
Min Typ
Max
Combined Digital and On-chip Analog Filter Response - Single-Speed Mode - 48 kHz
Passband
to -0.01 dB corner
to -3 dB corner
0
0
-
-
.454
.499
Fs
Fs
Frequency Response
10 Hz to 20 kHz
-0.01
-
+0.01
dB
StopBand
0.547
-
-
Fs
StopBand Attenuation
102
-
-
dB
Group Delay
-
10.4/Fs
-
s
De-emphasis Error
Fs = 32 kHz
(Relative to 1 kHz)
Fs = 44.1 kHz
Fs = 48 kHz
-
-
-
-
-
-
±0.36
±0.21
±0.14
dB
dB
dB
Combined Digital and On-chip Analog Filter Response - Double-Speed Mode - 96 kHz
Passband
to -0.01 dB corner
to -3 dB corner
0
0
-
-
.430
.499
Fs
Fs
Frequency Response
10 Hz to 20 kHz
-0.01
-
+0.01
dB
StopBand
.583
-
-
Fs
StopBand Attenuation
80
-
-
dB
Group Delay
-
6.15/Fs
-
s
Combined Digital and On-chip Analog Filter Response - Quad-Speed Mode - 192 kHz
Passband
to -0.01 dB corner
to -3 dB corner
0
0
-
-
.105
.490
Fs
Fs
Frequency Response
10 Hz to 20 kHz
-0.01
-
+0.01
dB
StopBand
.635
-
-
Fs
StopBand Attenuation
90
-
-
dB
Group Delay
-
7.1/Fs
-
s