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AD1992
Rev. 0 | Page 9 of 20
20
–140
FREQUENCY (Hz)
P
0
–20
–40
–60
–80
–100
–120
100
1k
10k
0
Figure 10. IMD for 19 kHz/20 kHz Twin-Tone Stimulus with
500 mW Power in Each Tone
40
0
FREQUENCY (Hz)
A
100
1k
10k
35
30
25
20
15
10
5
PGA GAIN = 18dB
PGA GAIN = 12dB
PGA GAIN = 6dB
PGA GAIN = 0dB
0
Figure 11. Amplifier Gain vs. Frequency, 6 Ω Load, PVDD = 12 V
0
–120
FREQUENCY (Hz)
S
D
100
1k
10k
–20
–40
–60
–80
–100
L CHANNEL DRIVEN,
R CHANNEL IDLE
L CHANNEL IDLE,
R CHANNEL DRIVEN
0
Figure 12. Channel Separation vs. Frequency, Driven Channel Has
1 W Output Power into 6 Ω Load
1
0.0001
FREQUENCY (Hz)
100
1k
10k
T
0.1
0.01
0.001
–120
T
–60
–40
–50
–80
–90
–70
–100
–110
0
Figure 13. THD vs. Frequency, 1 W Output Power into 4 Ω Load, PVDD = 12 V
1
0.0001
FREQUENCY (Hz)
100
1k
10k
T
0.1
0.01
0.001
–120
T
–60
–40
–50
–80
–90
–70
–100
–110
0
Figure 14. THD vs. Frequency, 1 W Output Power into 6 Ω Load, PVDD = 12 V
1
0.0001
FREQUENCY (Hz)
100
1k
10k
T
0.1
0.01
0.001
–120
T
–60
–40
–50
–80
–90
–70
–100
–110
0
Figure 15. THD vs. Frequency, 1 W Output Power into 8 Ω Load, PVDD = 12 V
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