- 您現在的位置：買賣IC網 > PDF目錄365952 > TS487-2 (意法半導體) 100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE PDF資料下載
參數資料
| 型號： | TS487-2 |
| 廠商： | 意法半導體 |
| 英文描述： | 100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE |
| 中文描述： | 100兆瓦立體聲耳機放大器具有待機模式 |
| 文件頁數： | 27/31頁 |
| 文件大小： | 465K |
| 代理商： | TS487-2 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當前第27頁第28頁第29頁第30頁第31頁
TS486-TS487
27/31
APPLICATION NOTE:
TS486/487 GENERAL DESCRIPTION
TS486/487 is a family of dual audio amplifiers able
to drive16
or 32
headsets. Working in the 2V to
5.5V supply voltage range, they deliver 100mW at
5V and 12mW at 2V in a 16
load. An internal
output current limitation, offers protection against
short-circuits at the output over a limited time
period.
Fixed gain versions of the TS486 and TS487
including the feedback resistor and the input
resistors are also proposedto reduce the number
of external parts.
The TS486 and TS487 exhibit a low quiescent
current of typically 1.8mA, allowing usage in
portable applications.
The
SHUTDOWN input.
TS487), the deviceis in sleep modewhen PIN 5 is
connected at GND (resp. V
CC
).
standby
mode
is
selected
TS486 (respectively
using
the
For
GAIN SETTING
The gain of each inverter amplifier of the TS486
and TS487 is set by the resistors R
IN
and R
FEED
.
Gain
LINEAR
= -(R
FEED
/R
IN
)
Gain
dB
= 20 Log(R
FEED
/R
IN
)
Fixed
including R
IN
and R
FEED
are proposed to reduce
external parts.
gain versions
TS486-n and
TS487-n
LOW FREQUENCY ROLL-OFF WITH INPUT
CAPACITORS
The low roll-off frequency of the headphone
amplifiers depends on the input capacitors C
IN1
and C
IN2
and the input resistors R
IN1
and R
IN2
.
The C
IN
capacitor in series with the input resistor
R
IN
of the amplifier 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
IN
is:
C
IN
> 1 / (2*
π
*F
min
*R
IN
)
The
frequency roll-off versus the input capacitor C
IN
following curve
gives
directly
the
low
20k
20k
20k
20k
Vcc
+
220
μ
F
+
220
μ
F
Right In
Left In
+
ZL=32Ohms
+
ZL=32Ohms
+
1
μ
F
+
330nF
+
330nF
+
Cs
1
μ
F
Cin1
Cin2
Rin1
Cout2
Cout1
Rin2
Rfeed1
Rfeed2
Cb
+
-
+
-
8
VCC
4
1
7
2
3
5
6
BIAS
TS486=Stdby
TS487=Stdby
GND
Stdby
Stdby level
threshold=0.9V
Stdby ctrl
1k
1k
相關PDF資料 |
PDF描述 |
|---|---|
| TS4890IS | AUDIO AMPLIFIER|SINGLE|BIPOLAR|TSSOP|8PIN|PLASTIC |
| TS556CJ | Analog Timer Circuit |
| TS556IJ | Analog Timer Circuit |
| TS556MJ | Analog Timer Circuit |
| TS556 | LOW POWER DUAL CMOS TIMER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TS4872_05 | 制造商:STMICROELECTRONICS 制造商全稱: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:未知廠家 制造商全稱:未知廠家 功能描述:Amplifier. Other |
| TS487-2IST | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Amplifier. Other |
| TS487-4 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE |
發布緊急采購，3分鐘左右您將得到回復。