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參數資料
| 型號： | TS487-4IQT |
| 英文描述： | Amplifier. Other |
| 中文描述： | 放大器。其他 |
| 文件頁數： | 28/31頁 |
| 文件大小： | 465K |
| 代理商： | TS487-4IQT |
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TS486-TS487
28/31
and for various values of the input resistor R
IN
.
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 C
OUT1
and
C
OUT2
. Each output capacitor C
OUT
in series with
the resistance of the load R
L
is equivalent to a first
order high pass filter.
Assuming that F
min
is the lowest frequency to be
amplified (with a 3dB attenuation), the minimum
value of C
OUT
is:
C
OUT
> 1 / (2*
π
*F
min
*R
L
)
The following curve gives directly the low roll-off
frequency versus the output capacitor C
OUT
in
μ
F
and for the two typical 16
and 32
impedances:
DECOUPLING CAPACITORC
B
The internal bias voltage at Vcc/2 is decoupled
with the external capacitor C
B
.
The TS486 and TS487 have a specified Power
Supply Rejection Ratio parameter with C
B
= 1
μ
F.
A higher value of C
B
improves the PSRR, for
example, a 4.7
μ
F 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
headphone output. This allows the capacitors
Cout to be charged even when no headphone is
plugged.
parallel with
each
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
W
Rin = 20k
W
and
fixed gain ve rs ions
Rin = 10k
W
Rin = 1k
W
L
(
Cin ( F)
0.1
1
1
10
100
Rin
MAX
=24k
Rin
TYP
=20k
Rin
MIN
=16k
-
(
Input CapacitorCin (
m
F)
10
100
1000
10000
1
10
100
1000
RL = 16
W
RL = 32
W
L
(
C
OUT
( F)
相關PDF資料 |
PDF描述 |
|---|---|
| TS487-4IST | Amplifier. Other |
| TS487IDT | Amplifier. Other |
| TS487IST | Amplifier. Other |
| TS487-4 | 100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE |
| TS487 | 100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TS487-4IST | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Amplifier. Other |
| TS487ID | 功能描述:音頻放大器 100mW Headphone Amp RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TS487IDT | 功能描述:音頻放大器 100mW Headphone Amp RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TS487IQT | 功能描述:音頻放大器 100mW stereo headphone amp RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TS487IST | 功能描述:音頻放大器 100mW Headphone Amp RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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