CS4231A Datasheet, PDF (45/76 Pages) List of Unclassifed Manufacturers – PARALLEL INTERFACE MULTIMEDIA AUDIO CODEC

10.The AD1848 does not have any
CS4231A specific features. See Appen-
dix A for more details.
11.The TEST pin on the CS4231A must be
grounded. This pin is not used or con-
nected on the AD1848. Grounding this
pin will support the CS4231A while hav-
ing no affect on the AD1848.
CS4231A
ADC/DAC FILTER RESPONSE PLOTS
Figures 18 through 23 show the overall fre-
quency response, passband ripple, and transition
band for the CS4231A ADCs and DACs. Fig-
ure 24 shows the DACs’ deviation from linear
phase. Since the CS4231A scales filter response
based on sample frequency selected, all fre-
quency response plots x-axis’ are shown from 0
to 1 where 1 is equivalent to Fs. Therefore, for
any given sample frequency, multiply the x-axis
values by the sample frequency selected to get
the actual frequency.
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Input Frequency (×Fs)
Figure 18. ADC Filter Response.
0.2
0.1
-0.0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
Input Frequency (×Fs)
Figure 19. ADC Passband Ripple.
DS139PP2
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0.40 0.43 0.46 0.49 0.52 0.55 0.58 0.61 0.64 0.67 0.70
Input Frequency (×Fs)
Figure 20. ADC Transition Band.
45