参数资料
型号: LM4866MT/NOPB
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 音频/视频放大
英文描述: 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20
封装: 4.40 MM, TSSOP-20
文件页数: 21/21页
文件大小: 1013K
代理商: LM4866MT/NOPB
Typical Performance Characteristics (Continued)
Channel Separation
Power Supply
Rejection Ratio
20018619
20018621
Open Loop
Frequency Response
Supply Current vs
Supply Voltage
20018622
20018623
External Components Description
(Refer to Figure 1.)
Components
Functional Description
1.
R
i
The Inverting input resistance, along with R
f, set the closed-loop gain. Ri, along with Ci, form a high pass
filter with f
c = 1/(2
πR
iCi).
2.
C
i
The input coupling capacitor blocks DC voltage at the amplifier’s input terminals. C
i, along with Ri, create a
highpass filter with f
c = 1/(2
πR
iCi). Refer to the section, SELECTING PROPER EXTERNAL
COMPONENTS, for an explanation of determining the value of C
i.
3.
R
f
The feedback resistance, along with R
i, set the closed-loop gain.
4.
C
s
The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING section for information about
properly placing, and selecting the value of, this capacitor.
5.
C
B
The capacitor, C
B, filters the half-supply voltage present on the BYPASS pin. Refer to the SELECTING
PROPER EXTERNAL COMPONENTS section for information concerning proper placement and selecting
C
B’s value.
LM4866
www.national.com
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