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参数资料
| 型号： | TS489IQT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.13 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封装： | 2 X 2 MM, DFN-8 |
| 文件页数： | 17/32页 |
| 文件大小： | 570K |
| 代理商： | TS489IQT |
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Application information
TS488-TS489
24/32
Note:
In case FCL is kept the same for calculation, It must be taken in account that the
1st order high-pass filter on the input and the 1st order high-pass filter on the
output create a 2nd order high-pass filter in the audio signal path with an
attenuation 6dB on FCL and a roll-off 40db decade.
4.4
Higher cut-off frequency
In the high frequency region, you can limit the bandwidth by adding a capacitor Cfeed in
parallel with Rfeed. It forms a low-pass filter with a -3dB cut-off frequency FCH. Assuming
that FCH is highest frequency to be amplified (with a 3dB attenuation), the maximum value of
Cfeed is:
Figure 79.
Lower cut-off frequency vs.
input capacitor
Figure 80.
Lower cut-off frequency vs.
output capacitor
1
10
100
1000
10
100
1k
10k
Rin=50k
Ω
Rin=100k
Ω
Rin=20k
Ω
Lo
w
er
C
u
t-
o
ff
fr
eq
uency
(Hz
)
Cin (nF)
Rin=10k
Ω
0.1
1
10
100
1000
10
100
1k
10k
R
L
=32
Ω
R
L
=600
Ω
R
L
=16
Ω
Lo
we
rCut-off
frequency
(H
z
)
Cout (
μF)
Figure 81.
Higher cut-off frequency vs. feedback capacitor
F
CH
1
2
π R
feed
C
feed
--------------------------------------------------
=
0.01
0.1
1
10
100
1k
10k
100k
Rfeed=40k
Ω
Rfeed=80k
Ω
Rfeed=20k
Ω
H
igh
e
rC
u
t-off
F
requen
c
y
(kH
z
)
Cfeed
(
μF)
Rfeed=10k
Ω
相关PDF资料 |
PDF描述 |
|---|---|
| TS489IST | 0.13 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS4890IDT | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS4890ID | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS4890IST | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS4890IQT | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS489IST | 功能描述:音频放大器 Popfree 100mW stereo headphone amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TS4900 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4900ID | 功能描述:音频放大器 300mW Audio Pwr Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TS4900IDT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4900IS | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
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