Note 6: Machine Model, 220pF-240pF discharged through all pins.

Note 7: The given

driving 4

Note 8: Typicals are measured at 25˚C and represent the parametric norm.

Note 9: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 10: Datasheet minimum and maximum specification limits are guaranteed by design, test, or statistical analysis.

Note 11: Output power is measured at the amplifier’s package pins.

Note 12: When driving 3

uninterrupted copper area connected to the MH package’s exposed DAP.

External Components Description

See Figure 1.

Components

Functional Description

1.

C

i

The input coupling capacitor blocks DC voltage at the amplifier’s inverting input terminals. C

LM4874’s variable input resistance R

πR

inverting and noninverting inputs require a C

EXTERNAL COMPONENTS, for an explanation of determining the value of C

2.

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.

3.

C

B

The capacitor, C

Information section, SELECTING EXTERNAL COMPONENTS, for information concerning proper placement

and selecting C

Typical Performance Characteristics

MH Specific Characteristics

THD vs Frequency

THD vs Frequency

20046998

V

Ω,P

at (from top to bottom at 1kHz):

A

A

20046997

V

Ω,P

at (from top to bottom at 1kHz):

A

A

www.national.com

4