CS4270_06 Datasheet, PDF (12/49 Pages) Cirrus Logic – 24-Bit, 192 kHz Stereo Audio CODEC

CS4270
DAC 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 5)
Single-Speed Mode
Passband (Note 6)
Parameter
Frequency Response 10 Hz to 20 kHz
StopBand
StopBand Attenuation
Group Delay
De-emphasis Error (Note 8)
Double-Speed Mode
Passband (Note 6)
Frequency Response 10 Hz to 20 kHz
StopBand
StopBand Attenuation
Group Delay
Quad-Speed Mode
Passband (Note 6)
Frequency Response 10 Hz to 20 kHz
StopBand
StopBand Attenuation
Group Delay
Symbol Min
Typ
Max Unit
to -0.1 dB corner
to -3 dB corner
(Note 7)
tgd
Fs = 32 kHz
Fs = 44.1 kHz
Fs = 48 kHz
0
0
-.175
.5465
50
-
-
-
-
-
-
-
-
-
10/Fs
-
-
-
.35
Fs
.4992 Fs
+.01 dB
-
Fs
-
dB
-
s
+1.5/+0 dB
+.05/-.25 dB
-.2/-.4 dB
to -0.1 dB corner
to -3 dB corner
0
-
0
-
-.15
-
.5770
-
(Note 7)
55
-
tgd
-
5/Fs
.22
Fs
.501
Fs
+.15 dB
-
Fs
-
dB
-
s
to -0.1 dB corner
to -3 dB corner
0
-
0
-
-.12
-
0.7
-
(Note 7)
51
-
tgd
-
2.5/Fs
0.110 Fs
0.469 Fs
+0
dB
-
Fs
-
dB
-
s
5. Amplitude vs. Frequency plots of this data are available in Section 9. “Filter Plots” on page 41. See
Figures 24 through 47.
6. Response is clock dependent and will scale with Fs.
7. For Single-Speed Mode, the Measurement Bandwidth is 0.5465 Fs to 3 Fs.
For Double-Speed Mode, the Measurement Bandwidth is 0.577 Fs to 1.4 Fs.
For Quad-Speed Mode, the Measurement Bandwidth is 0.7 Fs to 1 Fs.
8. De-emphasis is available only in Single-Speed Mode.
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DS686PP1