External Components Description (Figure 1)

Components

Functional Description

1.

R

i

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

high-pass filter with C

πR

2.

C

i

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

high-pass filter with R

πR

for an explanation of how to determine the value of C

3.

R

f

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

4.

C

1

Flying capacitor. Low ESR ceramic capacitor (

≤100mΩ)

5.

C

2

Output capacitor. Low ESR ceramic capacitor (

≤100mΩ)

6.

C

3

Tantalum capacitor. Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply

Bypassing section for information concerning proper placement and selection of the supply bypass capacitor.

7.

C

4

Ceramic capacitor. Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply

Bypassing section for information concerning proper placement and selection of the supply bypass capacitor.

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