Datasheet

LM4880
SNAS103C –NOVEMBER 1995–REVISED MAY 2013 www.ti.com
Automatic Switching Circuit
Figure 4. Automatic Switching Circuit
External Components Description
(Figure 2)
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/(2πR
i
C
i
).
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
i
at f
c
= 1/(2πR
i
C
i
). Refer to PROPER SELECTION OF EXTERNAL COMPONENTS for an explanation
of how to determine the value of C
i
.
3. R
F
Feedback resistance which sets closed-loop gain in conjunction with R
i
.
4. C
S
Supply bypass capacitor which provides power supply filtering. Refer to Application Information for proper
placement and selection of the supply bypass capacitor.
5. C
B
Bypass pin capacitor which provides half-supply filtering. Refer to PROPER SELECTION OF EXTERNAL
COMPONENTS for information concerning proper placement and selection of C
B
.
6. C
o
Output coupling capacitor which blocks the DC voltage at the amplifier's output. Forms a high pass filter with R
L
at
f
o
= 1/(2πR
L
C
o
).
4 Submit Documentation Feedback Copyright © 1995–2013, Texas Instruments Incorporated
Product Folder Links: LM4880