CDB4385(2004) Просмотр технического описания (PDF) - Cirrus Logic
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CDB4385 Datasheet PDF : 56 Pages
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CS4385
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 sample rate
by multiplying the given characteristic by Fs.) (See note 12.)
Fast Roll-Off
Parameter
Min
Typ
Max
Unit
Combined Digital and On-chip Analog Filter Response - Single Speed Mode - 48 kHz
Passband (Note 9)
to -0.01 dB corner
0
-
.454
Fs
to -3 dB corner
0
-
.499
Fs
Frequency Response 10 Hz to 20 kHz
-0.01
-
+0.01
dB
StopBand
0.547
-
-
Fs
StopBand Attenuation
(Note 10) 102
-
-
dB
Group Delay
-
10.3/Fs
-
s
De-emphasis Error (Note 11)
Fs = 32 kHz
-
-
±0.23
dB
(Relative to 1 kHz)
Fs = 44.1 kHz
-
-
±0.14
dB
Fs = 48 kHz
-
-
±0.09
dB
Combined Digital and On-chip Analog Filter Response - Double Speed Mode - 96 kHz
Passband (Note 9)
to -0.01 dB corner
0
-
.430
Fs
to -3 dB corner
0
-
.499
Fs
Frequency Response 10 Hz to 20 kHz
-0.01
-
+0.01
dB
StopBand
.583
-
-
Fs
StopBand Attenuation
(Note 10)
80
-
-
dB
Group Delay
-
5.9/Fs
-
s
Combined Digital and On-chip Analog Filter Response - Quad Speed Mode - 192 kHz
Passband (Note 9)
to -0.01 dB corner
0
-
.105
Fs
to -3 dB corner
0
-
.490
Fs
Frequency Response 10 Hz to 20 kHz
-0.01
-
+0.01
dB
StopBand
.635
-
-
Fs
StopBand Attenuation
(Note 10)
90
-
-
dB
Group Delay
-
7.0/Fs
-
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
hardware mode.
12. Amplitude vs. Frequency plots of this data are available starting on page 51.
DS671A1
9
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