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TS421 数据表(PDF) 27 Page - STMicroelectronics

部件名 TS421
功能描述  360 mW mono amplifier with standby mode
PDF  42 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TS421 数据表(HTML) 27 Page - STMicroelectronics

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Figure 89. Signal to noise ratio vs. power supply
voltage with unweighted filter (20 Hz to 20 kHz)
2.0
2.5
3.0
3.5
4.0
4.5
5.0
60
65
70
75
80
85
90
Av = 8
Cb = 1
µF
THD+N < 0.5%
Tamb = 25°C
RL=32Ω
RL=16Ω
RL=8Ω
Power Supply Voltage (V)
Figure 90. Signal to noise ratio vs. power supply
voltage with weighted filter Type A
2.0
2.5
3.0
3.5
4.0
4.5
5.0
70
75
80
85
90
95
Av = 8
Cb = 1
µF
THD+N < 0.5%
Tamb = 25°C
RL=32Ω
RL=16Ω
RL=8Ω
Power Supply Voltage (V)
Figure 91. Noise floor Vcc = 5 V
100
1000
10000
0
10
20
30
40
50
60
70
Standby=OFF
Standby=ON
RL>=16Ω
Vcc=5V
Av=8
Cb = 1
µF
Input Grounded
Bw < 125kHz
Tamb=25°C
20k
20
Frequency (Hz)
Figure 92. Noise floor Vcc = 2 V
100
1000
10000
0
10
20
30
40
50
60
70
Standby=OFF
Standby=ON
RL>=16Ω
Vcc=2V
Av=8
Cb = 1
µF
Input Grounded
Bw < 125kHz
Tamb=25°C
20k
20
Frequency (Hz)
Figure 93. PSRR vs. power supply voltage
100
1000
10000
100000
-70
-60
-50
-40
-30
-20
-10
0
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
Vripple = 100mVrms
Rfeed = 80kΩ
Input = floating
Cb = 1
µF
RL >= 16Ω
Tamb = 25°C
Frequency (Hz)
Figure 94. PSRR vs. input capacitor
100
1000
10000
100000
-50
-40
-30
-20
-10
0
Cin = 100nF
Cin = 1
µF, 220nF
Vripple = 200mVpp
Av = 8, Vcc = 5V
Input = grounded
Cb = 1
µF, Rin = 20kΩ
RL >= 16Ω
Tamb = 25°C
Frequency (Hz)
TS419, TS421
Electrical characteristics curves
DS3048 - Rev 7
page 27/42



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