TPA122
150-mW STEREO AUDIO POWER AMPLIFIER
SLOS211C – AUGUST1998 – REVISED MARCH 2000
TYPICAL CHARACTERISTICS
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
vs
FREQUENCY
POWER OUTPUT
10
1
10
V
= 5 V
= 8 Ω
= –1 V/V
V
= 5 V
= 8 Ω
= –1 V/V
DD
L
DD
L
R
A
R
A
V
V
20 kHz
P
O
= 30 mW
1
0.1
P
O
= 60 mW
10 kHz
1 kHz
0.1
0.01
20 Hz
P
O
= 10 mW
1k
0.001
0.01
20
100
10k 20k
10m
0.1
1
f – Frequency – Hz
P
O
– Output Power – W
Figure 17
Figure 18
SUPPLY RIPPLE REJECTION RATIO
SUPPLY RIPPLE REJECTION RATIO
vs
vs
FREQUENCY
FREQUENCY
0
–10
–20
–30
0
–10
–20
–30
V
R
= 3.3 V
= 8 Ω to 10 kΩ
DD
L
V
R
= 5 V
= 8 Ω to 10 kΩ
DD
L
C
= 0.1 µF
B
C = 0.1 µF
B
C
= 1 µF
B
C = 1 µF
B
–40
–50
–60
–40
–50
–60
C
= 2 µF
B
C = 2 µF
B
–70
–80
–90
Bypass = 1.65 V
–70
–80
–90
Bypass = 2.5 V
–100
20
–100
100
1k
10k 20k
20
100
1k
10k 20k
f – Frequency – Hz
f – Frequency – Hz
Figure 19
Figure 20
10
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