CS4244 Datasheet, PDF (14/63 Pages) Cirrus Logic – 4 In/4 Out Audio CODEC with PCM and TDM Interfaces

CS4244
ADC DIGITAL FILTER CHARACTERISTICS
Test Conditions (unless otherwise specified): Device configured as shown in Section 2. on page 8. Input sine
wave: 1 kHz; VA_SEL = 0 for VA = 3.3 VDC, 1 for VA = 5.0 VDC.; Measurement Bandwidth is 20 Hz to 20 kHz
unless otherwise specified. See filter plots in Section 7. on page 60.
Parameter (Note 15)
Passband (Frequency Response)
Passband Ripple
Stopband
Stopband Attenuation
Single-Speed Mode
ADC Group Delay (Note 16)
High-Pass Filter Characteristics (48 kHz Fs)
Frequency Response
-3.0 dB
-0.13 dB
Phase Deviation
@ 20 Hz
Passband Ripple
Filter Settling Time (Note 17)
Double-Speed Mode
ADC Group Delay (Note 16)
High-Pass Filter Characteristics (96 kHz Fs)
Frequency Response
-3.0 dB
-0.13 dB
Phase Deviation
@ 20 Hz
Passband Ripple
Filter Settling Time (Note 17)
to -0.1 dB corner
Min
0
-0.09
0.6
70
Typ Max Unit
- 0.4535 Fs
-
0.17 dB
-
-
Fs
-
-
dB
-
9.5/Fs
-
s
-
2
-
Hz
-
11
-
Hz
-
10
-
Deg
-0.09
-
0.17 dB
-
25000/Fs
0
s
-
9.5/Fs
-
s
-
4
-
Hz
-
22
-
Hz
-
10
-
Deg
-0.15
-
0.17 dB
-
25000/Fs
0
s
Note:
15. Response is clock-dependent and will scale with Fs.
16. The ADC group delay is measured from the time the analog inputs are sampled on the AINx pins to
the FS/LRCK transition (rising or falling) after the last bit of that (group of) sample(s) has been
transmitted on SDOUTx.
17. The amount of time from input of half-full-scale step function until the filter output settles to 0.1% of
full scale.
DS900F2
14