Texas Instruments TPA005D12 manual Crosstalk, Frequency

TPA005D12 Class-D EVM Performance Characteristics

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

			CROSSTALK
			vs
	0		FREQUENCY
	± 10	VDD = 5 V
		RL = 4 Ω
	± 20	PO = 2 W
		TA = 25° C
± dB	± 30
	±40
Crosstalk
	± 50
	± 60
	± 70
	± 80
	± 90	100	1k	10k	20k
	20
			f ± Frequency ± Hz

Figure 3±17. Class-D Amplifier Crosstalk versus Frequency at 2 W Into 8 Ω

			CROSSTALK
			vs
	0		FREQUENCY
	± 10	VDD = 5 V
		RL = 8 Ω
	± 20	PO = 1 W
		TA = 25° C
± dB	± 30
	±40
Crosstalk
	± 50
	± 60
	± 70
	± 80
	± 90	100	1k	10k	20k
	20
			f ± Frequency ± Hz

Details 3-23