TS4984 Datasheet, PDF (16/29 Pages) STMicroelectronics – 2 x 1W Stereo audio power amplifier with active low standby mode

TS4984
Figure 56: SIgnal to noise ratio vs. power
supply with A weighted filter
95
90
85
80
2.5
RL=8Ω
RL=16Ω
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 57: Crosstalk vs. frequency
0
Vcc = 5V
-20 ^{Av = 2}
Pout = 1W
-40
RL = 8 Ω
BW < 125kHz
Tamb = 25 C
-60
-80
-100
-120
100
L to R
R to L
1000
Frequency (Hz)
10000
Figure 58: Crosstalk vs. frequency
0
Vcc = 3.3V
-20 ^{Av = 2}
Pout = 300mW
RL = 8 Ω
-40 _{BW < 125kHz}
Tamb = 25 C
-60
-80
-100
-120
100
L to R
R to L
1000
Frequency (Hz)
10000
Electrical characteristics
Figure 59: Crosstalk vs. frequency
0
Vcc = 2.6V
-20 ^{Av = 2}
Pout = 180mW
RL = 8 Ω
-40 _{BW < 125kHz}
Tamb = 25 C
-60
-80
-100
-120
100
L to R
R to L
1000
Frequency (Hz)
10000
Figure 60: Crosstalk vs. frequency
0
Vcc = 2.2V
-20 ^{Av = 2}
Pout = 70mW
RL = 8 Ω
-40 _{BW < 125kHz}
Tamb = 25 C
-60
-80
-100
-120
100
L to R
R to L
1000
Frequency (Hz)
10000
Figure 61: Output noise voltage, device ON
50
Vcc = 2.2V to 5V
45 _{Cb = 1µF}
RL = 8Ω
40 _{Tamb = 25°C}
35
Unweighted Filter
30
25
20
A Weighted Filter
15
10
2
4
6
8
10
Closed Loop Gain
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