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TPA005D12 Class-D EVM Performance Characteristics
3-23
Details
EVM crosstalk is shown in Figures 3–16 and 3–17. The frequency is swept
from 20 Hz to 20 kHz for a constant 2-W output. Several factors affect
crosstalk, such as component selection (especially the inductor), filter layout,
grounding, and power supply decoupling.
Figure 3–16. Class-D Amplifier Crosstalk versus Frequency at 2 W Into 4
Ω
20 100 1k
Crosstalk – dB
f – Frequency – Hz
CROSSTALK
vs
FREQUENCY
10k 20k
V
DD
= 5 V
R
L
= 4 Ω
P
O
= 2 W
TA = 25° C
0
–10
–20
–30
–40
–50
–70
–80
–90
–60
Figure 3–17. Class-D Amplifier Crosstalk versus Frequency at 2 W Into 8
Ω
20 100 1k
Crosstalk – dB
f – Frequency – Hz
CROSSTALK
vs
FREQUENCY
10k 20k
V
DD
= 5 V
R
L
= 8 Ω
P
O
= 1 W
TA = 25° C
0
–10
–20
–30
–40
–50
–70
–80
–90
–60