Cirrus Logic CS4270 - Manual (Page 12)

12 DS686F1
CS4270
ADC DIGITAL FILTER CHARACTERISTICS
Measurement Bandwidth is 10 Hz to 20 kHz unless otherwise specified. (Note 9)
Notes: 9. Plots of this data are contained in Section 9. “Filter Plots” on page 38 . See Figures 23 through 46 .
10. The filter frequency response scales precisely with Fs.
11. Response shown is for Fs equal to 48 kHz. Filter characteristics scale with Fs.
Parameter Symbol Min Typ Max Unit
Single-Speed Mode
Passband (-0.1 dB) (Note 10) 0 - 0.49 Fs
Passband Ripple - - 0.035 dB
Stopband (Note 10) 0.57 - - Fs
Stopband Attenuation 70 - - dB
Group Delay t
gd
- 12/Fs - s
Double-Speed Mode
Passband (-0.1 dB) (Note 10) 0 - 0.49 Fs
Passband Ripple - - 0.05 dB
Stopband (Note 10) 0.56 - - Fs
Stopband Attenuation 69 - - dB
Group Delay t
gd
- 9/Fs - s
Quad-Speed Mode
Passband (-0.1 dB) (Note 10) 0 - 0.26 Fs
Passband Ripple - - 0.05 dB
Stopband (Note 10) 0.50 - - Fs
Stopband Attenuation 60 - - dB
Group Delay t
gd
- 5/Fs - s
High-Pass Filter Characteristics
Frequency Response -3.0 dB
-0.13 dB
(Note 11)
-
- 1
20
-
- Hz
Hz
Phase Deviation @ 20 Hz (Note 11) - 10 - deg
Passband Ripple - - 0 dB