TS4984 Datasheet, PDF (15/29 Pages) STMicroelectronics – 2 x 1W Stereo audio power amplifier with active low standby mode

Electrical characteristics
Figure 50: THD+N vs. frequency
RL=4Ω
Av=2
0.1 Cb = 1µF
Bw < 125kHz
Tamb = 25°C
Vcc=5V, Po=1W
Vcc=2.2V, Po=40mW
0.01
20
100
1000
Frequency (Hz)
10000 20k
Figure 51: THD+N vs. frequency
RL=8Ω
0.1 ^Av=2
Cb = 1µF
Bw < 125kHz
Tamb = 25°C
Vcc=5V, Po=O.8W
Vcc=2.2V, Po=70mW
0.01
20
100
1000
Frequency (Hz)
10000 20k
Figure 52: THD+N vs. frequency
RL=16Ω
0.1 ^Av=2
Cb = 1µF
Bw < 125kHz
Tamb = 25°C
Vcc=5V, Po=O.5W
Vcc=2.2V, Po=70mW
0.01
20
100
1000
Frequency (Hz)
10000 20k
TS4984
Figure 53: SIgnal to noise ratio vs. power supply
with unweighted filter (20Hz to 20kHz)
100
95
90
85
2.5
RL=8Ω
RL=16Ω
RL=4Ω
Av = 2
Cb = 1µF
THD+N < 0.7%
Tamb = 25°C
3.0
3.5
4.0
4.5
5.0
Power Supply Voltage (V)
Figure 54: SIgnal to noise ratio vs. pwr supply
with unweighted filter (20Hz to 20kHz)
85
80
75
70
2.5
RL=16Ω
RL=8Ω
RL=4Ω
Av = 10
Cb = 1µF
THD+N < 0.7%
Tamb = 25°C
3.0
3.5
4.0
4.5
5.0
Power Supply Voltage (V)
Figure 55: SIgnal to noise ratio vs. power
supply with A weighted filter
105
100
95
90
2.5
RL=16Ω
RL=8Ω
RL=4Ω
Av = 2
Cb = 1µF
THD+N < 0.7%
Tamb = 25°C
3.0
3.5
4.0
4.5
5.0
Power Supply Voltage (V)
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