CS4245
ADC DIGITAL FILTER CHARACTERISTICS
Parameter (Notes 15 , 17 )
Symbol
Min
Typ
Max
Unit
Single-Speed Mode
Passband
Passband Ripple
Stopband
Stopband Attenuation
(-0.1 dB)
0
-
0.5688
70
-
-
-
-
0.4896
0.035
-
-
Fs
dB
Fs
dB
Total Group Delay (Fs = Output Sample Rate)
t gd
-
12/Fs
-
s
Double-Speed Mode
Passband
Passband Ripple
Stopband
Stopband Attenuation
(-0.1 dB)
0
-
0.5604
69
-
-
-
-
0.4896
0.025
-
-
Fs
dB
Fs
dB
Total Group Delay (Fs = Output Sample Rate)
t gd
-
9/Fs
-
s
Quad-Speed Mode
Passband
Passband Ripple
Stopband
Stopband Attenuation
(-0.1 dB)
0
-
0.5000
60
-
-
-
-
0.2604
0.025
-
-
Fs
dB
Fs
dB
Total Group Delay (Fs = Output Sample Rate)
t gd
-
5/Fs
-
s
High-Pass Filter Characteristics
Frequency Response
Phase Deviation
Passband Ripple
-3.0 dB
-0.13 dB
@ 20 Hz
-
-
-
1
20
10
-
-
-
-
0
Hz
Hz
Deg
dB
Filter Settling Time
10 5 /Fs
s
15. Filter response is guaranteed by design.
16. Response shown is for Fs = 48 kHz.
17. Response is clock-dependent and will scale with Fs. Note that the response plots ( Figures 33 to 44 ) are
normalized to Fs and can be de-normalized by multiplying the X-axis scale by Fs.
16
DS656F3
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