LM4915 datasheet(4/11 Pages) NSC

4 / 11 page

Electrical Characteristics V

DD = 3.0V (Notes 1, 2, 8) (Continued)

Note 9: See ISD distribution values shown in the ISD Distribution curve, VDD =5VandV=3V, shown in the Typical Performance Characteristics section.

External Components Description (Figure 1)

Components

Functional Description

Bypass pin capacitor that provides half-supply filtering. Refer to the section Proper Selection of External

Components for information concerning proper placement and selection of C

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

high-pass filter with the internal input resistance R

i. For the LM4915, Ri = 20k

Ω, thus creating a high-pass

filter f

c = 1/(2

πR

iCi). Refer to the section Proper Selection of External Components for an explanantion of

how to determine the value of C

Typical Performance Characteristics

THD+N vs Frequency

DD = 5V, RL =16

Ω

THD+N vs Frequency

DD = 5V, RL =32

Ω

200482C6

200482C7

THD+N vs Frequency

DD = 3V, RL =16

Ω,P

O = 100mW

THD+N vs Frequency

DD = 3V, RL =32

Ω,P

O = 80mW

200482C4

200482C5

LM4915 Datasheet(PDF) 4 Page - National Semiconductor (TI)