CS4340
+0
-10
+0
-10
-20
-30
-40
-50
-60
-70
-20
-30
-40
-50
-60
d
B
r
d
B
r
-70
A
A
-80
-80
-90
-90
-100
-110
-120
-130
-100
-110
-120
-130
-140
-140
5k
10k
15k
20k
Hz
25k
30k
35k
40k
5k
10k
15k
20k
Hz
25k
30k
35k
40k
Figure 33. FFT 0 dB input, HRM, VA = 3V
Figure 34. FFT -60 dB input, HRM, VA = 3V
+0
-10
+20
+18
+16
+14
+12
+10
+8
-20
-30
-40
-50
-60
d
B
r
d
B
r
+6
-70
+4
A
-80
A
+2
-90
+0
-100
-110
-120
-130
-2
-4
-6
-8
-140
-10
-100
5k
10k
15k
20k
Hz
25k
30k
35k
40k
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
dBFS
Figure 35. FFT Idle Noise, HRM, VA = 3V
Figure 36. Fade-to-Noise Linearity, HRM, VA = 3V
-85
-86
-85
-86
-87
-88
-87
-88
-89
-89
-90
-90
-91
-91
-92
-92
-93
-93
d
B
r
d
B
r
-94
-94
-95
-95
-96
-96
A
A
-97
-97
-98
-98
-99
-99
-100
-101
-102
-103
-104
-105
-100
-101
-102
-103
-104
-105
20
-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
+0
50
100
200
500
1k
Hz
2k
5k
10k
20k
40k
dBFS
Figure 37. THDN vs Ampl, HRM, VA = 3V
Figure 38. THDN vs Freq, HRM, VA = 3V
24
DS297PP3
CIRRUS [ CIRRUS LOGIC ]
