TS4972 データシートの表示（PDF） - STMicroelectronics
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TS4972 Datasheet PDF : 30 Pages
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Electrical Characteristics
Figure 7: Open Loop Frequency Response
100
80
60
Gain
40
Phase
20
0
Vcc = 5V
-20
CL = 560pF
Tamb = 25°C
-40
0.3 1
10
100
1000
Frequency (kHz)
-80
-100
-120
-140
-160
-180
-200
-220
10000
Figure 8: Open Loop Frequency Response
100
80
Phase
60
Gain
40
20
0
Vcc = 2.6V
-20 CL = 560pF
Tamb = 25°C
-40
0.3 1
10
100
1000
Frequency (kHz)
-80
-100
-120
-140
-160
-180
-200
-220
-240
10000
Figure 9: Open Loop Frequency Response
100
80
Phase
60
Gain
40
20
0
-20
-40
0.3
Vcc = 3.3V
CL = 560pF
Tamb = 25°C
1
10
100
1000
Frequency (kHz)
-80
-100
-120
-140
-160
-180
-200
-220
-240
10000
TS4972
Figure 10: Power Supply Rejection Ratio
(PSRR) vs Power supply
-30
Vripple = 200mVrms
Rfeed = 22Ω
-40 Input = floating
RL = 8Ω
Tamb = 25°C
-50
Vcc = 5V, 3.3V & 2.6V
-60
Cb = 1µF & 0.1µF
-70
-80
10
100
1000
10000
Frequency (Hz)
100000
Figure 11: Power Supply Rejection Ratio
(PSRR) vs Bypass Capacitor
-10
Cb=1µF
Vcc = 5, 3.3 & 2.6V
-20
Rfeed = 22k
Cb=10µF Rin = 22k, Cin = 1µF
-30
Rg = 100Ω, RL = 8Ω
Tamb = 25°C
-40
Cb=47µF
-50
-60
-70 Cb=100µF
-80
10
100
1000
10000
Frequency (Hz)
100000
Figure 12: Power Supply Rejection Ratio
(PSRR) vs Feedback Resistor
-10
Vcc = 5, 3.3 & 2.6V
-20 Cb = 1µF & 0.1µF
Vripple = 200mVrms
-30 Input = floating
RL = 8Ω
-40 Tamb = 25°C
Rfeed=110kΩ
Rfeed=47kΩ
-50
-60
-70
-80
10
Rfeed=22kΩ
Rfeed=10kΩ
100
1000
10000
Frequency (Hz)
100000
7/30
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