8.2.1.3 Application Curves

Figure 8-2 uses a 1-kHz sine wave with a code range of 0x81FF ±0x7E00 to prevent voltage clipping. A 40-kHz

low-pass filter is also used.

Frequency (Hz)

20

30

40 50 60 7080 100

200

300 400 500

700

1000

2000

3000

5000 7000 10000

20000

-95

-90

-85

-80

-75

-70

-65

1-kHz sine wave with a code range of 0x81FF ±0x7E00

40-kHz low-pass filter

Figure 8-2. THD+N vs Frequency

Figure 8-3 uses a 1-kHz sine wave with a code range of 0x81FF ±0x7E00 to prevent voltage clipping. 32768

bins, 8 averages, and a 40-kHz low-pass filter are also used.

Frequency (Hz)

10

20

30 40 50

70

100

200

300

500 700 1000

2000 3000

5000

10000

2000030000 50000

50000

-150

-125

-100

-75

-50

-25

0

1-kHz sine wave with a code range of 0x81FF ±0x7E00

32768 bins, 8 averages, 40-kHz low-pass filter

Figure 8-3. FFT Amplitude vs Frequency

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DAC82002

SBASAK1 – AUGUST 2022

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