Cirrus Logic CS470xx - Manual (Page 25)

25 DS787PP9
5.17 DAC Characteristics
Figure 5-16. DAC Differential Output Test Circuit
Figure 5-17. Maximum Loading
5.17.3 Combined DAC Interpolation and On-chip Analog Filter Response
Parameter Min Typ Max Unit
Passband (Frequency Response)
to 0.22 dB corner
to –3 dB corner
0
0 —
— 0.4125
0.4979 Fs
Fs
Frequency Response 10 Hz–20 kHz –0.02 — +0.02 dB
StopBand 0.5465 — — Fs
StopBand Attenuation 100 — — dB
Group Delay — 10/Fs — s
N output: R
L
= 4.87k + ( [2

F*1800pF] -1 || ((2.43k + [2

F*470pF] -1 ) || 4.87k ))
AOUT
AOUT_x+
AOUT_x-
1.96 k
C
L
4700 pF 1200 pF
1.
96
k
22 µF
+
953
4.87 k 2.43 k
-
+
560
+
1800 pF
470 pF
4.87 k
22 µF
P output: R
L
= 1.96k + ( [2

F*4700pF] -1 || (1.96k + [2

F*22µF - ] -1 ) || (953 + [2

F*1200pF ] -1 ))
C
L
10 k
100
50
75
25
2.5 5 10 15
Safe Operating
Region
Cap
a
cit
ive L
oad -- C
(
p
F
)
L
Resistive Load -- R (k  )
L
125
3
20