Texas Instruments AN-1622 LM49100, User Manual, Page: 10 / 20

FREQUENCY (Hz)
T
HD
+N
(
%
)
10
1
0.1
0.01
0.001
20 200 2k 20k
FREQUENCY (Hz)
T
HD
+N
(
%
)
10
1
0.1
0.01
0.001
20 200 2k 20k
FREQUENCY (Hz)
T
HD
+N
(
%
)
10
1
0.1
0.01
0.001
20 200 2k 20k
FREQUENCY (Hz)
T
H
D+
N
(%
)
10
1
0.1
0.001
20 200 2k 20k
0.01
FREQUENCY (Hz)
T
HD
+N
(
%
)
10
1
0.1
0.01
0.001
20 200 2k 20k
FREQUENCY (Hz)
T
H
D+
N
(%
)
10
1
0.1
0.01
0.001
20 200 2k 20k
Typical Demonstration Board Audio Performance
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13 Typical Demonstration Board Audio Performance
Typical THD + N versus Frequency performance curves at V
DD
= 3.6V, 3V, and 5V for 8 Ω and 32 Ω are
shown in Figure 10 through Figure 15 , respectively. Typical THD + N versus Output Power performance
curves at V
DD
= 3V, 3.6V, and 5V for 32 Ω and 8 Ω are shown in Figure 16 and Figure 17 , respectively.
Figure 10. THD+N vs Frequency Figure 11. THD+N vs Frequency
V
DD
= 3.6V, R
L
= 8 Ω , P
O
= 320mW V
DD
= 3.6V, R
L
= 32 Ω , P
O
= 25mW
BW = 22kHz, LS, Mode 1 BW = 22kHz, HP, Mode 4, 7
Figure 12. THD+N vs Frequency Figure 13. THD+N vs Frequency
V
DD
= 3V, R
L
= 8 Ω , P
O
= 215mW V
DD
= 3V, R
L
= 32 Ω , P
O
= 25mW
BW = 22kHz, LS, Mode 1 BW = 22kHz, HP, Mode 4, 7
Figure 14. THD+N vs Frequency Figure 15. THD+N vs Frequency
V
DD
= 5V, R
L
= 8
Ω
, P
O
= 630mW V
DD
= 5V, R
L
= 32
Ω
, P
O
= 25mW
BW = 22kHz, Loudspeaker, Mode 1 BW = 22kHz, Headphone, Mode 4, 7
10 AN-1622 LM49100 Evaluation Board» SNAA043A – October 2007 – Revised May 2013
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