參數(shù)資料
型號(hào): LM4897MM
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類(lèi): 音頻/視頻放大
英文描述: 1.1 Watt Audio Power Amplifier with Fade-In and Fade-Out
中文描述: 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10
封裝: MSOP-10
文件頁(yè)數(shù): 5/14頁(yè)
文件大?。?/td> 612K
代理商: LM4897MM
External Components Description
(
Figure 1
)
Components
1.
Functional Description
R
i
Inverting input resistance which sets the closed-loop gain in conjunction with R
f
. This resistor also forms a
high pass filter with C
i
at f
C
= 1/(2
π
R
i
C
i
).
Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a
highpass filter with R
i
at f
C
= 1/(2
π
R
i
C
i
). Refer to the section,
Proper Selection of External Components
, for
an explanation of how to determine the value of C
i
.
Feedback resistance which sets the closed-loop gain in conjunction with R
i
.
Supply bypass capacitor which provides power supply filtering. Refer to the
Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
Bypass pin capacitor which provides half-supply filtering. Refer to the section,
Proper Selection of External
Components
, for information concerning proper placement and selection of C
B
.
2.
C
i
3.
4.
R
f
C
S
5.
C
B
Typical Performance Characteristics
THD+N vs Frequency
V
DD
= 5V, R
L
= 8
THD+N vs Frequency
V
DD
= 3V, R
L
= 8
200509A2
200509A3
THD+N vs Frequency
V
DD
= 2.6V, R
= 8
PWR = 100mW
THD+N vs Power Out
V
DD
= 5V
R
L
= 8
, f = 1kHz
200509A4
200509A5
L
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