CS4265_07 Datasheet, PDF (11/56 Pages) Cirrus Logic – 104 dB, 24-Bit, 192 kHz Stereo Audio CODEC

CS4265
6. Guaranteed by design. See Figure 2. R_L and C_L reflect the recommended minimum resistance and
maximum capacitance required for the internal op-amp’s stability. C_L affects the dominant pole of the
internal output amp; increasing C_L beyond 100 pF can cause the internal op-amp to become unstable.
DAC COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE
Parameter (Note 7,10)
Combined Digital and On-chip Analog Filter Response
Symbol Min
Typ
Max Unit
Single-Speed Mode
Passband (Note 7)
to -0.1 dB corner
to -3 dB corner
Frequency Response 10 Hz to 20 kHz
StopBand
StopBand Attenuation
(Note 8)
Group Delay
tgd
De-emphasis Error (Note 9)
Fs = 44.1 kHz
Combined Digital and On-chip Analog Filter Response
0
-
0.35
Fs
0
-
0.4992 Fs
-0.175
-
+0.01
dB
0.5465
-
-
Fs
50
-
-
dB
-
10/Fs
-
s
-
-
+0.05/-0.25 dB
Double-Speed Mode
Passband (Note 7)
to -0.1 dB corner
to -3 dB corner
0
-
0.22
Fs
0
-
0.501
Fs
Frequency Response 10 Hz to 20 kHz
-0.15
-
+0.15
dB
StopBand
0.5770
-
-
Fs
StopBand Attenuation
(Note 8)
55
-
-
dB
Group Delay
tgd
-
5/Fs
-
s
Combined Digital and On-chip Analog Filter Response
Quad-Speed Mode
Passband (Note 7)
Frequency Response 10 Hz to 20 kHz
StopBand
StopBand Attenuation
Group Delay
to -0.1 dB corner
to -3 dB corner
(Note 8)
tgd
0
0
-0.12
0.7
51
-
-
-
-
-
-
2.5/Fs
0.110
Fs
0.469
Fs
0
dB
-
Fs
-
dB
-
s
7. Filter response is guaranteed by design.
8. 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.
9. De-emphasis is available only in Single-Speed Mode.
10. Response is clock dependent and will scale with Fs. Note that the amplitude vs. frequency plots of this
data (Figures 18 to 27) have been normalized to Fs and can be de-normalized by multiplying the X-axis
scale by Fs.
DS657F2
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