CS42448 Datasheet, PDF (18/70 Pages) Cirrus Logic – 108 dB, 192 kHz 6-in, 8-out CODEC

All Speed Modes
Interchannel Isolation
(1 kHz)
-
Analog Output
Full Scale Output
1.210•VA
Interchannel Gain Mismatch
-
Gain Drift
-
Output Impedance
-
DC Current draw from an AOUT pin
-
(Note 10)
AC-Load Resistance (R_L) (Note 12)
3
Load Capacitance (C_L)
(Note 12)
-
100
1.300•VA
0.1
±100
100
-
-
-
-
-
100
-
dB
1.392•VA 0.605•VA 0.650•VA 0.696•VA Vpp
0.25
-
0.1
0.25
dB
-
-
±100
-
ppm/°C
-
-
100
-
Ω
10
-
-
10
µA
-
3
100
-
-
-
kΩ
-
100
pF
Notes: 10. Guaranteed by design. The DC current draw represents the allowed current draw from the AOUT pin
due to typical leakage through the electrolytic DC blocking capacitors.
11. One-half LSB of triangular PDF dither is added to data.
12. Guaranteed by design. See Figure 2. R_L and C_L reflect the recommended minimum resistance and
maximum capacitance required for the internal op-amp's stability and signal integrity. In this circuit
topology, C_L will effectively move the dominant pole of the two-pole amp in the output stage. Increasing
this value beyond the recommended 100 pF can cause the internal op-amp to become unstable. See
Appendix A for a recommended output filter.
DAC1-4
AOUTxx
3.3 µF
+
R_L
Analog
Output
C_L
AGND
Figure 2. Output Test Load
125
100
75
50
Safe Operating
Region
25
2.5 5
3
10
15
20
Resistive Load -- R_L (kΩ )
Figure 3. Maximum Loading
18
DS648PP2