All Speed Modes
Interchannel Isolation
Analog Output
(1 kHz)
-
100
-
-
100
-
dB
Full Scale Output
Interchannel Gain Mismatch
Gain Drift
1.210•VA 1.300•VA 1.392•VA 0.605•VA 0.650•VA 0.696•VA
Vpp
dB
-
-
-
-
0.1
±100
100
-
0.25
-
-
-
-
0.1
±100
100
-
0.25
-
-
-
-
ppm/°C
Ω
Output Impedance
DC Current draw from an AOUT pin
10
10
µA
(Note 10)
AC-Load Resistance (R )
(Note 12)
(Note 12)
3
-
-
-
-
3
-
-
-
-
kΩ
L
Load Capacitance (C )
100
100
pF
L
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 3. R and C reflect the recommended minimum resistance and
L
L
maximum capacitance required for the internal op-amp's stability and signal integrity. In this circuit
topology, C will effectively move the dominant pole of the two-pole amp in the output stage. Increasing
L
this value beyond the recommended 100 pF can cause the internal op-amp to become unstable. See
Appendix A for a recommended output filter.
125
100
DAC1-4
AOUTxx
3.3 µF
+
75
50
Analog
Output
Safe Operating
Region
CL
RL
25
AGND
2.5
5
10
15
20
3
Ω
Resistive Load -- R (k )
L
Figure 3. Output Test Load
Figure 4. Maximum Loading
DS646PP2
19
CIRRUS [ CIRRUS LOGIC ]
