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Texas Instruments TPA005D12 User Manual

Page 37

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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

20

100

1k

Crosstalk – dB

f – Frequency – Hz

CROSSTALK

vs

FREQUENCY

10k

20k

VDD = 5 V
RL = 4

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

20

100

1k

Crosstalk – dB

f – Frequency – Hz

CROSSTALK

vs

FREQUENCY

10k

20k

VDD = 5 V
RL = 8

PO =

1

W

TA = 25

°

C

0

– 10

– 20

– 30

–40

– 50

– 70

– 80

– 90

– 60