LM4890MSLASHNOPB datasheet(7/36 Pages) TI

7 / 36 page

LM4890

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SNAS138L – SEPTEMBER 2001 – REVISED MAY 2013

External Components Description

(See Figure 7)

Components

Functional Description

RIN

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

filter with CIN at fC= 1/(2π RINCIN).

CIN

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

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

to determine the value of CIN.

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

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

information concerning proper placement and selection of the supply bypass capacitor, CBYPASS.

CBYPAS 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 CBYPASS.

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