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LM4834 数据表(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM4834
功能描述  1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp
PDF  12 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM4834 数据表(HTML) 5 Page - National Semiconductor (TI)

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External Components Description Figure 2 (Continued)
Components.
Functional Description
4.
C
O
Output coupling capacitor which blocks the DC voltage at the amplifiers output. Forms a high pass filter
with R
L at fo = 1/(2πRLCO).
5.
R
S
Summing resistor that combines the right and left line level outputs into the mono input of the bridged
amplifier. The two summing resistors in parallel determine the value of the input resistance of the bridged
amplifier.
6.
R
LFE
Resistor for the bridged power amplifier in series with R
F at high frequencies. Used in conjunction with
C
LFE to increase closed-loop gain at low frequencies.
7.
R
F
Feedback resistor which sets the closed-loop gain in conjunction with the equivalent R
S for the bridged
power amplifier.
8.
R
M1
Resistor in series with Microphone supply pin and the microphone for biasing differential input
microphones.
9.
R
M2
Resistor in series with reference ground and the microphone used for biasing differential input
microphones.
Typical Performance Characteristics
THD+N vs Frequency
Bridged Power Amp
DS100015-5
THD+N vs Frequency
Bridged Power Amp
DS100015-4
THD+N vs Frequency
Bridge Power Amp
DS100015-6
THD+N vs Frequency
Line Out/HP Amplifiers
DS100015-7
THD+N vs Frequency
Line Out/HP Amplifiers
DS100015-8
THD+N vs Frequency
Line Out/HP Amplifiers
DS100015-9
5
www.national.com



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