LM4808M 参数 Datasheet PDF下载

LM4808

External Components Description

Compo-

nents

1. R

i

2. C

i

3. R

f

4. C

S

5. C

B

6. C

O

7. R

B

(Figure

1)

Functional Description

Inverting input resistance which sets the closed-loop gain in conjuction with R

f

. This resistor also

forms a high pass filter with C

i

at f

c

= 1 / (2πR

i

C

i

).

Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a

highpass filter with R

i

at f

c

= 1 / (2πR

i

C

i

). Refer to the section,

Proper Selection of External

Components,

for and explanation of how to determine the value of C

i

.

Feedback resistance which sets closed-loop gain in conjuction with R

i

.

Supply bypass capacitor which provides power supply filtering. Refer to the

Application Information

section for 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

.

Output coupling capacitor which blocks the DC voltage at the amplifier’s output. Forms a high pass

filter with R

L

at f

O

= 1/(2πR

L

C

O

)

Resistor which forms a voltage divider that provides a half-supply DC voltage to the non-inverting

input of the amplifier.

Typical Performance Characteristics

THD+N vs Frequency

THD+N vs Frequency

THD+N vs Frequency

DS101276-3

DS101276-4

DS101276-5

THD+N vs Frequency

THD+N vs Frequency

THD+N vs Frequency

DS101276-6

DS101276-7

DS101276-8

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