LM4834 datasheet(5/12 Pages) NSC

5 / 12 page

External Components Description Figure 2 (Continued)

Components.

Functional Description

Output coupling capacitor which blocks the DC voltage at the amplifiers output. Forms a high pass filter

with R

L at fo = 1/(2πRLCO).

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.

LFE

Resistor for the bridged power amplifier in series with R

F at high frequencies. Used in conjunction with

LFE to increase closed-loop gain at low frequencies.

Feedback resistor which sets the closed-loop gain in conjunction with the equivalent R

S for the bridged

power amplifier.

Resistor in series with Microphone supply pin and the microphone for biasing differential input

microphones.

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

LM4834 Datasheet(PDF) 5 Page - National Semiconductor (TI)