Adc digital filter characteristics, Cs4234 adc digital filter characteristics – Cirrus Logic CS4234 User Manual
Page 14
DS899F1
14
CS4234
ADC DIGITAL FILTER CHARACTERISTICS
Test Conditions (unless otherwise specified): Device configured as shown in
. Input sine
wave: 1 kHz;
= 0 for VA = 3.3 VDC, 1 for VA = 5.0 VDC.; T
A
= -40 to +105
C; Measurement Bandwidth is
20 Hz to 20 kHz unless otherwise specified. See filter plots in
.
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 rising transition after the last bit of that group of samples has been transmitted on
SDOUT1.
17. The amount of time from input of half-full-scale step function until the filter output settles to 0.1% of
full scale.
Min
Typ
Max
Unit
Passband (Frequency Response)
to -0.1 dB corner
0
-
0.4535
Fs
Passband Ripple
-0.09
-
0.17
dB
Stopband
0.6
-
-
Fs
Stopband Attenuation
70
-
-
dB
Single-Speed Mode
ADC Group Delay
-
9.5/Fs
-
s
High-Pass Filter Characteristics
(48 kHz Fs)
Frequency Response
-3.0 dB
-0.13 dB
-
-
2
11
-
-
Hz
Hz
Phase Deviation
@ 20 Hz
-
10
-
Deg
Passband Ripple
-0.09
-
0.17
dB
Filter Settling Time
-
25000/Fs
-
s
Double-Speed Mode
ADC Group Delay
-
9.5/Fs
-
s
High-Pass Filter Characteristics
(96 kHz Fs)
Frequency Response
-3.0 dB
-0.13 dB
-
-
4
22
-
-
Hz
Hz
Phase Deviation
@ 20 Hz
-
10
-
Deg
Passband Ripple
-0.15
-
0.17
dB
Filter Settling Time
-
25000/Fs
-
s