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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： | 20/31页 |
| 文件大小： | 1112K |
| 代理商： | TS487-1QT |
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TS486-TS487
27/31
APPLICATION NOTE:
TS486/487 GENERAL DESCRIPTION
TS486/487 is a family of dual audio amplifiers able
to drive 16
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 proposed to 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
standby
mode
is
selected
using
the
SHUTDOWN input. For TS486 (respectively
TS487), the device is in sleep mode when PIN 5 is
connected at GND (resp. VCC).
GAIN SETTING
The gain of each inverter amplifier of the TS486
and TS487 is set by the resistors RIN and RFEED.
GainLINEAR = -(RFEED/RIN)
GaindB = 20 Log(RFEED/RIN)
Fixed
gain
versions
TS486-n
and
TS487-n
including RIN and RFEED are proposed to reduce
external parts.
LOW FREQUENCY ROLL-OFF WITH INPUT
CAPACITORS
The low roll-off frequency of the headphone
amplifiers depends on the input capacitors CIN1
and CIN2 and the input resistors RIN1 and RIN2.
The CIN capacitor in series with the input resistor
RIN of the amplifier 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 CIN is:
CIN > 1 / (2*π*Fmin*RIN )
The
following
curve
gives
directly
the
low
frequency roll-off versus the input capacitor CIN
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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