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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 Note 12.
Parameter
Fast Roll-Off
Min Typ Max
Unit
Combined Digital and On-chip Analog Filter Response - Single-Speed Mode - 48 kHz
Passband (Note 9)
Frequency Response
StopBand
StopBand Attenuation
Group Delay
De-emphasis Error (Note 11)
(Relative to 1 kHz)
to -0.01 dB corner
to -3 dB corner
10 Hz to 20 kHz
(Note 10)
Fs = 32 kHz
Fs = 44.1 kHz
Fs = 48 kHz
0
0
-0.01
0.547
102
-
-
-
-
-
-
-
-
-
10.4/Fs
-
-
-
.454
.499
+0.01
-
-
-
±0.36
±0.21
±0.14
Fs
Fs
dB
Fs
dB
s
dB
dB
dB
Combined Digital and On-chip Analog Filter Response - Double-Speed Mode - 96 kHz
Passband (Note 9)
Frequency Response
StopBand
StopBand Attenuation
Group Delay
to -0.01 dB corner
to -3 dB corner
10 Hz to 20 kHz
(Note 10)
0
0
-0.01
.583
80
-
-
-
-
-
-
6.15/Fs
.430
.499
+0.01
-
-
-
Fs
Fs
dB
Fs
dB
s
Combined Digital and On-chip Analog Filter Response - Quad-Speed Mode - 192 kHz
Passband (Note 9)
Frequency Response
StopBand
StopBand Attenuation
Group Delay
to -0.01 dB corner
to -3 dB corner
10 Hz to 20 kHz
(Note 10)
0
0
-0.01
.635
90
-
-
-
-
-
-
7.1/Fs
.105
.490
+0.01
-
-
-
Fs
Fs
dB
Fs
dB
s
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 .
12
DS670F2
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