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Cs8421 – Cirrus Logic CS8421 User Manual

Page 28

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28

DS641F6

CS8421

-150

-120

-147.5

-145

-142.5

-140

-137.5

-135

-132.5

-130

-127.5

-125

-122.5

d

B
F
S

50k

175k

75k

100k

125k

150k

Hz

-150

-120

-147.5

-145

-142.5

-140

-137.5

-135

-132.5

-130

-127.5

-125

-122.5

d

B
F
S

50k

175k

75k

100k

125k

150k

Hz

Figure 39. THD+N vs. Output Sample Rate, 0 dBFS

1 kHz Tone, Fsi = 48 kHz

-150

-120

-147.5

-145

-142.5

-140

-137.5

-135

-132.5

-130

-127.5

-125

-122.5

d

B
F
S

50k

175k

75k

100k

125k

150k

Hz

-145

-135

-144

-143

-142

-141

-140

-139

-138

-137

-136

d

B
F
S

50k

175k

75k

100k

125k

150k

Hz

Figure 41. THD+N vs. Output Sample Rate, 0 dBFS

1 kHz Tone, Fsi = 44.1 kHz

-150

-120

-147.5

-145

-142.5

-140

-137.5

-135

-132.5

-130

-127.5

-125

-122.5

d

B
F
S

50k

175k

75k

100k

125k

150k

Hz

-150

-120

-147.5

-145

-142.5

-140

-137.5

-135

-132.5

-130

-127.5

-125

-122.5

d

B
F
S

50k

175k

75k

100k

125k

150k

Hz

Figure 43. THD+N vs. Output Sample Rate, 0 dBFS

1 kHz Tone, Fsi = 32 kHz