TS486 Datasheet, PDF (17/31 Pages) STMicroelectronics – 100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE

TS486-TS487
Fig. 49: Signal to Noise Ratio vs Power Supply
Voltage with Unweighted Filter (20Hz to 20kHz)
Fig. 50: Signal to Noise Ratio vs Power Supply
Voltage with Weighted Filter Type A
104 ^{Av = -1}
Cb = 1µF
102 ^{THD+N < 0.4%}
Tamb = 25°C
100
RL=600Ω
98
96
RL=32Ω
94
92
RL=16Ω
90
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Power Supply Voltage (V)
104 ^{Av = -1}
Cb = 1µF
102 ^{THD+N < 0.4%}
Tamb = 25°C
100
RL=600Ω
98
RL=32Ω
96
94
RL=16Ω
92
90
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Power Supply Voltage (V)
Fig. 51: PSRR vs Power Supply Voltage
0
-10
Vripple = 200mVpp
Av = -1
-20
Input = grounded
Cb = 1µF
-30
RL >= 16Ω
Tamb = 25°C
-40
Vcc = 2V
-50
-60
-70 Vcc = 5V, 3.3V & 2.5V
-80
100
1000
10000
Frequency (Hz)
100000
Fig. 52: PSRR vs Bypass Capacitor
0
-10
Vripple = 200mVpp
Av = -1
-20
Input = grounded
Vcc = 5V
-30
RL >= 16Ω
Tamb = 25°C
-40
-50
Cb = 1µF
-60
-70
Cb = 4.7µF
-80
100
Cb = 2.2µF
1000
10000
Frequency (Hz)
100000
Fig. 53: PSRR vs Input Capacitor
0
Vripple = 200mVpp
-10
Av = -1, Vcc = 5V
Input = grounded
-20
Cb = 1µF, Rin = 20kΩ
RL >= 16Ω
-30
Cin = 1µF, 220nF _{Tamb = 25°C}
-40
-50
-60
Cin = 100nF
-70
100
1000
10000
Frequency (Hz)
100000
Fig. 54: PSRR vs Output Capacitor
0
-10
-20
Cout = 470µF
-30
-40
Vripple = 200mVpp
Av = -1, Vcc = 5V
Input = grounded
Cb = 1µF, RL = 16Ω
RL >= 16Ω
Tamb = 25°C
-50
-60
Cout = 220µF
-70
-80
100
1000
10000
Frequency (Hz)
100000
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