
RC4861
PRODUCT SPECIFICATION
4
P
Single Ended Application Circuit
Figure 2. Single Ended Amplifier with A
V
= –1
* C
S
and C
B
size depend on specific application requirements and constraints. Typical values of C
S
and C
B
are 0.1
m
F
**Pin 1 should be connected to V
DD
to disable the amplifier or to GND to enable the amplifier. This pin should not be left floating.
***These components create a “dummy” load for pin 8 for stability purposes.
External Components Description
(for Figure 1)
Components
R
i
Functional Description
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/(2
p
R
i
C
i
).
Input coupling capacitor which blocks DC voltage at the amplifier's input terminals. Also creates
a highpass filter with R
i
at f
C
= 1/(2
p
R
i
C
i
).
Feedback resistance which sets closed-loop gain in conjuncticn with R
i
. Av = -R
f
/R
i
Supply bypass capacitor which provides power supply filtering.
Bypass pin capacitor which provides half supply filtering.
Used when a differential gain of over 10 is desired. C
f
in conjunction with R
f
creates a low-pass
filter which bandwidth limits the amplifier and prevents high frequency oscillation bursts.
f
C
= 1/(2
p
R
f
C
f
)
C
i
R
f
C
S
C
B
C
f
Rf
GND
**Shutdown
***0.1
μ
F
***2 k
65-4861-04
*C
B
VDD
*CS
+
CO
+
RL
8
Ri
Ci
+
–
6
4
3
2
7
18
5
20 k
220
μ
F
20 k
1
μ
F
Audio
Input