LM4911Q datasheet(8/30 Pages) TI1

8 / 30 page

LM4911, LM4911Q

SNAS152M – MAY 2004 – REVISED JUNE 2011

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External Components Description

(Figure 2)

Components

Functional Description

Inverting input resistance which sets the closed-loop gain in conjunction with Rf. This resistor also forms a high-pass

filter with Ci at fc = 1/(2πRiCi).

Input coupling capacitor which blocks the DC voltage at the amplifier's input terminals. Also creates a high-pass filter

with Ri at fc = 1/(2πRiCi). Refer to the section Proper Selection of External Components, for an explanation of how to

determine the value of Ci.

Feedback resistance which sets the closed-loop gain in conjunction with Ri.

Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply section for information

concerning 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 CB

Output coupling capacitor which blocks the DC voltage at the amplifier's output. Forms a high pass filter with RL at fo =

1/(2

πRLCo)

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