TS4974_07 Datasheet, PDF (13/25 Pages) STMicroelectronics – 1W differential audio power amplifier with up/down digital volume control pins

TS4974
Electrical characteristics
Figure 26. SNR vs. supply voltage
Figure 27. Output power vs. supply voltage
110
Unweighted filter (20Hz to 20kHz)
108 _{F = 1kHz}
106 G = 12dB
THD + N < 0.5%
104 _{Tamb = 25°C}
102
100
F = 1kHz
1.0 _{BW < 125 kHz}
Tamb = 25°C
0.8
0.6
8Ω
16Ω
98
0.4
96
RL=16Ω
32Ω
94
0.2
92
RL=8Ω
90
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0.0
2.5
3.0
3.5
4.0
4.5
5.0
Vcc (V)
Vcc (V)
Figure 28. Output power vs. supply voltage Figure 29. Output power vs. load resistance
1.4
F = 1kHz
1.2 ^{BW < 125 kHz}
Tamb = 25°C
1.0
8Ω
1.2
Vcc=5.5V
1.1
1.0
Vcc=5V
0.9
Vcc=4.5V
THD+N = 1%
Cb = 1μF
BW < 125kHz
Tamb = 25°C
0.8
Vcc=4V
0.8
0.7
16Ω
Vcc=3.3V
0.6
Vcc=3V
0.6
0.5
32Ω
0.4
0.4
0.3
0.2
0.2
0.1 _Vcc=2.6V
0.0
0.0
2.5
3.0
3.5
4.0
4.5
5.0
8
12
16
20
24
28
32
Vcc (V)
Load resistance (Ω)
Figure 30. Current consumption vs. supply
voltage
Figure 31. Standby current vs. supply voltage
4.0
No load
3.5 ^{Tamb = 25°C}
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
1
2
3
4
5
6
Vcc (V)
0.4
No load
Tamb = 25°C
0.3
0.2
0.1
0.0
0
1
2
3
4
5
6
Vcc (V)
13/25