Cirrus Logic CS4348 - Manual (Page 7)

7
CS4344/5/8
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 6)
Notes:
2. Response is clock dependent and will scale with Fs.
3. 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.
4. Refer to Figure 2 .
5. De-emphasis is available only in Single-Speed Mode.
6. Amplitude vs. Frequency plots of this data are available in
“Filter Plots” on page 18 .
Parameter Symbol Min Typ Max Unit
Combined Digital and On-chip Analog Filter Response—Single-Speed Mode
Passband (Note 2) to -0.1 dB corner
to -3 dB corner
0
0 -
- .35
.4992
Fs
Fs
Frequency Response 10 Hz to 20 kHz -.175 - +.01 dB
StopBand .5465 - - Fs
StopBand Attenuation (Note 3) 50 - - dB
Group Delay tgd - 10/Fs - s
De-emphasis Error (Note 5) Fs = 32 kHz
Fs = 44.1 kHz
Fs = 48 kHz
-
-
- -
-
- +1.5/+0
+.05/-.25
-.2/-.4
dB
dB
dB
Combined Digital and On-chip Analog Filter Response—Double-Speed Mode
Passband (Note 2) to +0.1 dB corner
to -3 dB corner
0
0 -
- .22
.501
Fs
Fs
Frequency Response 10 Hz to 20 kHz -.15 - +.15 dB
StopBand .5770 - - Fs
StopBand Attenuation (Note 3) 55 - - dB
Group Delay tgd - 5/Fs - s
Combined Digital and On-chip Analog Filter Response—Quad-Speed Mode
Passband (Note 2) to -0.1 dB corner
to -3 dB corner
0
0 -
- 0.110
0.469
Fs
Fs
Frequency Response 10 Hz to 20 kHz -.12 - +0 dB
StopBand 0.7 - - Fs
StopBand Attenuation (Note 3) 51 - - dB
Group Delay tgd - 2.5/Fs - s