SSM4321 datasheet(13/24 Pages) AD

13 / 24 page

Data Sheet

SSM4321

Rev. 0 | Page 13 of 24

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

0.01

0.1

OUTPUT POWER (W)

RL = 3Ω + 7.5µH

48kHz ISENSE

48kHz VSENSE

24kHz VSENSE

24kHz ISENSE

Figure 33. Sense ADC THD + N vs. Output Power into 3 Ω

–80

–70

–60

–50

–40

–30

–20

–10

20k

200

FREQUENCY (Hz)

RL = 8Ω + 33µH

800mW VSENSE

800mW ISENSE

400mW VSENSE

400mW ISENSE

200mW VSENSE

200mW ISENSE

Figure 34. Sense ADC THD + N vs. Frequency, PVDD = 5 V, RL = 8 Ω

–80

–70

–60

–50

–40

–30

–20

–10

20k

200

FREQUENCY (Hz)

RL = 4Ω + 15µH

2W VSENSE

2W ISENSE

1W VSENSE

1W ISENSE

500mW VSENSE

500mW ISENSE

Figure 35. Sense ADC THD + N vs. Frequency, PVDD = 5 V, RL = 4 Ω

–70

–60

–50

–40

–30

–20

–10

20k

200

FREQUENCY (Hz)

RL = 3Ω + 7.5µH

2W VSENSE

2W ISENSE

1W VSENSE

1W ISENSE

500mW VSENSE

500mW ISENSE

Figure 36. Sense ADC THD + N vs. Frequency, PVDD = 5 V, RL = 3 Ω

–160

–140

–120

–100

–80

–60

–40

–20

100k

10k

100

FREQUENCY (Hz)

RL = 8Ω +33µH

24kHz VSENSE

24kHz ISENSE

48kHz VSENSE

48kHz ISENSE

Figure 37. Output Spectrum of Sense ADC vs. Frequency (FFT),

POUT = 100 mW, RL = 8 Ω

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