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参数资料
| 型号： | TS487-1QT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO8 |
| 封装： | 3 X 3 MM, DFN-8 |
| 文件页数： | 21/31页 |
| 文件大小： | 1112K |
| 代理商： | TS487-1QT |
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TS486-TS487
28/31
and for various values of the input resistor RIN .
The input resistance of the fixed gain version is
typically 20k
.
The following curve shows the limits of the roll off
frequency depending on the min. and max. values
of Rin:
LOW FREQUENCY ROLL OFF WITH OUTPUT
CAPACITORS
The DC voltage on the outputs of the TS486/487
is blocked by the output capacitors COUT1 and
COUT2 . Each output capacitor COUT in series with
the resistance of the load RL is equivalent to a first
order high pass filter.
Assuming that Fmin is the lowest frequency to be
amplified (with a 3dB attenuation), the minimum
value of COUT is:
COUT > 1 / (2*π*Fmin*RL)
The following curve gives directly the low roll-off
frequency versus the output capacitor COUT in F
and for the two typical 16
and 32 impedances:
DECOUPLING CAPACITOR CB
The internal bias voltage at Vcc/2 is decoupled
with the external capacitor CB.
The TS486 and TS487 have a specified Power
Supply Rejection Ratio parameter with CB = 1F.
A higher value of CB improves the PSRR, for
example, a 4.7F improves the PSRR by 15dB at
200Hz (please, refer to fig. 76 "PSRR vs Bypass
Capacitor").
POP PRECAUTIONS
Generally headphones are connected using a
connector as a jack. To prevent a pop in the
headphones when plugged in the jack, a resistor
should be
connected in
parallel with
each
headphone output. This allows the capacitors
Cout to be charged even when no headphone is
plugged.
A resistor of 1 k
is high enough to be a negligible
load, and low enough to charge the capacitors
Cout in less than one second.
0.01
0.1
1
10
1
10
100
1000
Rin = 100k
Rin = 20k
and
fixed gain versions
Rin = 10k
Rin = 1k
Low
roll
off
frequency
(Hz
)
Cin (F)
10
100
1000
10000
1
10
100
1000
RL = 16
RL = 32
Low
roll-off
frequency
(Hz
)
C
OUT
( F)
相关PDF资料 |
PDF描述 |
|---|---|
| TS487-1ST | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS487-2QT | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO8 |
| TS487-2ST | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS487-4QT | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO8 |
| TS487-4ST | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4872 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:RAIL TO RAIL INPUT/OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE |
| TS487-2 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE |
| TS4872_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:RAIL TO RAIL INPUT/OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE |
| TS4872IJT | 制造商:STMicroelectronics 功能描述: |
| TS487-2IQT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Amplifier. Other |
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