LM4860 datasheet(3/9 Pages) NSC

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High Gain Application Circuit

Single Ended Application Circuit

External Components Description

(

Figures 1, 2)

Components

Functional Description

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

f. This resistor also

forms a high pass filter with C

i at fC = 1/(2π Ri Ci).

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

highpass filter with R

i at fC = 1/(2π Ri Ci).

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

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

section for proper placement and selection of supply bypass capacitor.

DS011988-3

FIGURE 2. Stereo Amplifier with A

VD = 20

DS011988-4

*CS and CB size depend on specific application requirements and constraints. Typical values of CS and CB are 0.1 µF.

**Pin 2, 6, or 7 should be connected to VDD to disable the amplifier or to GND to enable the amplifier. These pins should not be left floating.

***These components create a “dummy” load for pin 8 for stability purposes.

FIGURE 3. Single-Ended Amplifier with A

V = −1

LM4860 Datasheet(PDF) 3 Page - National Semiconductor (TI)