Datasheet

LM4861
www.ti.com SNAS095C –MAY 1997–REVISED MAY 2013
External Components Description
(Figure 2 and Figure 3)
Components Functional Description
1. R
i
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 f
C
= 1 / (2π R
i
C
i
).
2. C
i
Input coupling capacitor which blocks DC voltage at the amplifier's input terminals. Also creates a high pass filter with
R
i
at f
C
= 1 / (2π R
i
C
i
).
3. R
f
Feedback resistance which sets closed-loop gain in conjunction with R
i
.
4. C
S
Application Supply bypass capacitor which provides power supply filtering. Refer to for proper placement and selection of supply
Information bypass capacitor.
5. C
B
Bypass pin capacitor which provides half supply filtering. Refer to Application Information for proper placement and
selection of bypass capacitor.
6. C
f
(1)
C
f
in conjunction with R
f
creates a low-pass filter which bandwidth limits the amplifier and prevents possible high
frequency oscillation bursts. f
C
= 1 / (2π R
f
C
f
)
(1) Optional component dependent upon specific design requirements. Refer to Application Information for more information.
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