Texas Instruments TPA005D12 - Manual (Page 37)

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
VDD = 5 V
RL = 4
Ω
PO = 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
VDD = 5 V
RL = 8
Ω
PO = 1 W
TA = 25
°
C
0
– 10
– 20
– 30
–40
– 50
– 70
– 80
– 90
– 60