Datasheet

LM4819, LM4819MBD
www.ti.com SNAS133D –FEBRUARY 2001–REVISED MARCH 2013
External Components Description
(See Figure 1)
Components Functional Description
1. R
i
Combined with R
f
, this inverting input resistor sets the closed-loop gain. R
i
also forms a high pass filter with C
i
at f
c
=
1/(2πR
i
C
i
).
2. C
i
This input coupling capacitor blocks DC voltage at the amplifier's terminals. Combined with R
i
, it creates a high pass
filter with R
i
at f
c
= 1/(2πR
i
C
i
). Refer to the section, Proper Selection of External Components for an explanation of how
to determine the value of C
i
.
3. R
f
Combined with R
i
, this is the feedback resistor that sets the closed-loop gain: A
v
= 2(R
F
/R
i
).
4. C
S
This is the power supply bypass capacitor that filters the voltage applied to the power supply pin. Refer to the
Application Information section for proper placement and selection of C
s
.
5. C
B
This is the bypass pin capacitor that filters the voltage at the BYPASS pin. Refer to the section, Proper Selection of
External Components, for information concerning proper placement and selection of C
B
.
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