TS4974_07 Datasheet, PDF (12/25 Pages) STMicroelectronics – 1W differential audio power amplifier with up/down digital volume control pins

Electrical characteristics
TS4974
Figure 20. CMRR vs. frequency
Figure 21. CMRR vs. frequency
0
Vcc = 5V
-10 ^{RL ≥ 8Ω}
Tamb = 25°C
-20
-30
-40
G=12dB
G=0dB
Cb=1, 0.47, 0.1μF
Cb=1, 0.47, 0.1μF
-50
-60
-70
-80
100
1000
10000
Frequency (Hz)
0
Vcc = 3.3V
-10 RL ≥ 8Ω
Tamb = 25°C
-20
-30
-40
G=12dB
G=0dB
Cb=1, 0.47, 0.1μF
Cb=1, 0.47, 0.1μF
-50
-60
-70
-80
100
1000
10000
Frequency (Hz)
Figure 22. CMRR vs. frequency
Figure 23. SNR vs. supply voltage
0
Vcc = 2.6V
-10 ^{RL ≥ 8Ω}
Tamb = 25°C
-20
-30
-40
G=12dB
G=0dB
Cb=1, 0.47, 0.1μF
Cb=1, 0.47, 0.1μF
-50
-60
-70
-80
100
1000
10000
Frequency (Hz)
110
108
RL=16Ω
106
104
102
100
RL=8Ω
98
96 ^{A - weighted filter}
F = 1kHz
94 _{G = 0dB}
92 ^{THD + N < 0.5%}
Tamb = 25°C
90
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Vcc (V)
Figure 24. SNR vs. supply voltage
Figure 25. SNR vs. supply voltage
110
108
RL=16Ω
106
104
102
100
RL=8Ω
98
96 ^{A - weighted filter}
F = 1kHz
94 _{G = +12dB}
92 ^{THD + N < 0.5%}
Tamb = 25°C
90
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Vcc (V)
110
108
106
104
102
100
98
96
94
92
90
2.5
RL=8Ω
RL=16Ω
Unweighted filter (20Hz to 20kHz)
F = 1kHz
G = 0dB
THD + N < 0.5%
Tamb = 25°C
3.0
3.5
4.0
4.5
5.0
5.5
Vcc (V)
12/25