- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄365910 > TPA6112A2DGQR Switchlocks PDF資料下載
參數(shù)資料
| 型號： | TPA6112A2DGQR |
| 元件分類： | 音頻放大器 |
| 英文描述： | Switchlocks |
| 中文描述： | 音頻放大器|雙|采用TSSOP | 10PIN |塑料 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大小： | 143K |
| 代理商： | TPA6112A2DGQR |
TPA6100A2
50-mW ULTRALOW VOLTAGE STEREO HEADPHONE
AUDIO POWER AMPLIFIER
SLOS269A
–
JUNE 2000
–
REVISED NOVEMBER 2000
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
gain setting resistors, R
F
, R
I,
and R
The voltage gain for the TPA6100A2 is set by resistors R
F
and R
I
according to equation 1.
(1)
Gain
R
F
R
I
or Gain (dB)
20 log
R
F
R
I
Given that the TPA6100A2 is a MOS amplifier, the input impedance is very high. Consequently input leakage
currents are not generally a concern, although noise in the circuit increases as the value of R
F
increases. In
addition, a certain range of R
F
values is required for proper start-up operation of the amplifier. Taken together
it is recommended that the effective impedance seen by the inverting node of the amplifier be set between
5 k
and 20 k
. The effective impedance is calculated in equation 2.
(2)
Effective Impedance
R
F
R
I
R
F
R
I
As an example, consider an input resistance of 20 k
and a feedback resistor of 20 k
. The gain of the amplifier
would be
–
1 and the effective impedance at the inverting terminal would be 10 k
, which is within the
recommended range.
For high performance applications, metal film resistors are recommended because they tend to have lower
noise levels than carbon resistors. For values of R
F
above 50 k
, the amplifier tends to become unstable due
to a pole formed from R
F
and the inherent input capacitance of the MOS input structure. For this reason, a small
compensation capacitor of approximately 5 pF should be placed in parallel with R
F
. This, in effect, creates a
low-pass filter network with the cutoff frequency defined in equation 3.
(3)
f
c
1
2 R
F
C
F
For example, if R
F
is 100 k
and C
F
is 5 pF then f
c
is 318 kHz, which is well outside the audio range.
For maximum signal swing and output power at low supply voltages like 1.6 V to 3.3 V, BYPASS is biased to
V
DD
/4. However, to allow the output to be biased at V
DD
/2, a resistor, R, equal to R
F
must be placed from the
negative input to ground.
input capacitor, C
I
In the typical application, an input capacitor, C
I
, is required to allow the amplifier to bias the input signal to the
proper dc level for optimum operation. In this case, C
I
and R
I
form a high-pass filter with the corner frequency
determined in equation 4.
(4)
f
c
1
2 R
I
C
I
The value of C
I
is important to consider, as it directly affects the bass (low frequency) performance of the circuit.
Consider the example where R
I
is 20 k
and the specification calls for a flat bass response down to 20 Hz.
Equation 4 is reconfigured as equation 5.
(5)
C
I
1
2 R
I
f
c
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPA721DGNR | Single Audio Amplifier |
| TPA721DR | Single Audio Amplifier |
| TPA731DGNR | Single Audio Amplifier |
| TPA731DR | Single Audio Amplifier |
| TPA751DGNR | Amplifier. Other |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA6112A2DGQRG4 | 功能描述:音頻放大器 Stereo Diff Input Stereo Headphone RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6112A2EVM | 功能描述:音頻 IC 開發(fā)工具 TPA6112A2 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA6113A2D | 功能描述:音頻放大器 40mW Stereo Audio Pwr Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6113A2DG4 | 功能描述:音頻放大器 40mW Stereo Audio Pwr Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6113A2DR | 功能描述:音頻放大器 40mW Stereo Audio Pwr Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。