CS4239-JQ CIRRUS [Cirrus Logic], CS4239-JQ Datasheet - Page 80

• Manufacturer Part Number: CS4239-JQ
• Manufacturer: CIRRUS [Cirrus Logic]

ADC/DAC FILTER RESPONSE PLOTS
Figures 26 through 31 show the overall fre-
quency response, passband ripple, and transition
band for the ADCs and DACs. Figure 32 shows
the DACs’ deviation from linear phase. Since the
filter response scales based on sample frequency
selected, all frequency response plots x-axis are
shown from 0 to 1, where 1 is equivalent to Fs.
Therefore, for any given sample frequency, mul-
tiply the x-axis values by the sample frequency
selected to get the actual frequency.
80
-0.2
- 0 . 3
-0.4
-0.5
-0.6
-0.7
-0.8
-0.1
0.2
0.0
0.1
0.00
0.05
Figure 27. ADC Passband Ripple
0.10
0.15
Input Frequency ( x Fs)
0.20
0.25
0.30
-100
- 10
-20
-30
-40
-50
-60
-70
-80
-90
10
0
0.0
0.35
0.1
0.40
Figure 26. ADC Filter Response
0.2
0.45
0.3
0.50
Input Frequency ( x Fs)
0.4
0.5
-100
-10
-20
-30
-40
- 50
-60
- 70
-80
-90
0
0 . 40
0.6
CrystalClear Portable ISA Audio System
0.7
Figure 28. ADC Transition Band
0 . 45
0.8
0.9
0 . 50
Input Frequency ( x Fs)
TM
1.0
0 . 55
0 . 60
CS4239
DS253PP2
0 . 65
0 . 70