- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382352 > MUA08A (National Semiconductor Corporation) 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode PDF資料下載
參數(shù)資料
| 型號： | MUA08A |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode |
| 中文描述： | 在3.3V電源音頻功率放大器265mW的關(guān)斷模式 |
| 文件頁數(shù)： | 15/19頁 |
| 文件大?。?/td> | 772K |
| 代理商： | MUA08A |
Application Information
(Continued)
(5)
R
F
/R
i
= A
VD
/2
(6)
From Equation 5, the minimum A
VD
is 1.55; use A
VD
= 2.
Since the desired input impedance was 20 k
, and with a
A
VD
of 2, a ratio of 1:1 of R
to R
results in an allocation of
R
= R
= 20 k
. The final design step is to address the
bandwidth requirements which must be stated as a pair of
3 dB frequency points. Five times away from a pole gives
0.17 dB down from passband response which is better than
the required
±
0.25 dB specified.
f
L
= 100Hz/5 = 20Hz
f
H
= 20kHz x 5 = 100kHz
As stated in the
External Components
section, R
i
in con-
junction with C
i
create a highpass filter.
C
i
≥
1/(2
π
*
20 k
*
20 Hz) = 0.397μF;
The high frequency pole is determined by the product of the
desired high frequency pole, f
, and the differential gain,
A
. With a A
= 2 and f
= 100kHz, the resulting GBWP
= 100kHz which is much smaller than the LM4900 GBWP of
25MHz. This figure displays that if a designer has a need to
design an amplifier with a higher differential gain, the
LM4900 can still be used without running into bandwidth
problems.
use 0.39μF
L
www.national.com
15
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MUB08A | 1W, Bypass-Capacitor-less Audio Amplifier with Internal Selectable Gain |
| MUBW10-06A7 | Converter - Brake - Inverter Module |
| MUBW10-06A6 | Converter - Brake - Inverter Module (CBI1) |
| MUBW10-12A6 | Converter - Brake - Inverter Module (CBI1) |
| MUBW15-06A6 | Converter - Brake - Inverter Module (CBI1) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MUA-16A-2 | 制造商:HRS 制造商全稱:HRS 功能描述:MU Type Fiber Optic Connectors |
| MUAA2K8020QGC | 制造商:TECH 功能描述:MUAA2K80-20QGC MOS BI-POLAR |
| MUAA2K80-20QGC | 制造商:TECH 功能描述:MUAA2K80-20QGC MOS BI-POLAR |
| MUAA2K80-20QGC_03 | 制造商:MUSIC 制造商全稱:MUSIC Semiconductors 功能描述:MUAA Routing CoProcessor (RCP) Family |
| MUAA2K80-30QGI | 制造商:MUSIC 制造商全稱:MUSIC Semiconductors 功能描述:MUAA Routing CoProcessor (RCP) Family |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。