參數(shù)資料
型號： TS421IST
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 0.367 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
封裝： MINI, PLASTIC, SO-8
文件頁數(shù)： 9/32頁
文件大?。?/td> 1000K
代理商： TS421IST
TS419-TS421
17/32
Fig. 47: Signal to Noise Ratio vs Power Supply
Voltage with Unweighted Filter (20Hz to 20kHz)
Fig. 49: Noise Floor
Fig. 51: PSRR vs Input Capacitor
Fig. 48: Signal to Noise Ratio vs Power Supply
Voltage with Weighted Filter Type A
Fig. 50: Noise Floor
Fig. 52: PSRR vs Power Supply Voltage
2.0
2.5
3.0
3.5
4.0
4.5
5.0
70
75
80
85
90
95
100
Av = 2
Cb = 1
F
THD+N < 0.5%
Tamb = 25
°C
RL=32
RL=16
RL=8
Si
gnal
t
o
Noi
se
Rat
io
(
d
B)
Power Supply Voltage (V)
100
1000
10000
0
10
20
30
Standby=OFF
Standby=ON
RL>=16
Vcc=5V
Av=2
Cb = 1
F
Input Grounded
Bw < 125kHz
Tamb=25
°C
20k
20
Noi
se
Fl
oor
(
VRms)
Frequency (Hz)
100
1000
10000
100000
-70
-60
-50
-40
-30
-20
-10
0
Cin = 100nF
Cin = 1
F, 220nF
Vripple = 200mVpp
Av = 2, Vcc = 5V
Input = grounded
Cb = 1
F, Rin = 20k
RL >= 16
Tamb = 25
°C
PSRR
(
d
B)
Frequency (Hz)
2.0
2.5
3.0
3.5
4.0
4.5
5.0
80
85
90
95
100
105
Av = 2
Cb = 1
F
THD+N < 0.5%
Tamb = 25
°C
RL=32
RL=16
RL=8
Si
gnal
t
o
Noi
se
Rat
io
(
d
B)
Power Supply Voltage (V)
100
1000
10000
0
10
20
30
Standby=OFF
Standby=ON
RL>=16
Vcc=2V
Av=2
Cb = 1
F
Input Grounded
Bw < 125kHz
Tamb=25
°C
20k
20
Noi
se
Fl
oor
(
VRms)
Frequency (Hz)
100
1000
10000
100000
-80
-70
-60
-50
-40
-30
-20
-10
0
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
Vripple = 100mVrms
Rfeed = 20k
Input = floating
Cb = 1
F
RL >= 16
Tamb = 25
°C
PSRR
(
d
B)
Frequency (Hz)
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