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參數資料
| 型號： | TS487-2IST |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封裝： | MINI, SOP-8 |
| 文件頁數： | 20/31頁 |
| 文件大小： | 1101K |
| 代理商： | TS487-2IST |
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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
相關PDF資料 |
PDF描述 |
|---|---|
| TS487-4IQT | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO8 |
| TS487-4IST | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS487IDT | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS487ID | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS487IQT | 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO8 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TS487-4 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE |
| TS487-4IQT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Amplifier. Other |
| 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 |
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