MCP6291 N/A, MCP6291 Datasheet - Page 13

• Manufacturer Part Number: MCP6291
• Description: MCP6291-2-3-4
• Manufacturer: N/A

3.7
3.7.1
The MCP6291/2/3/4 op amp can be used in active-filter
applications. Figure 3-6 shows an inverting, third-order,
Multiple Feedback Lowpass filter that can be used as
an anti-aliasing filter.
FIGURE 3-6:
Filter.
This filter, and others, can be designed using
Microchip’s FilterLab
our web site (www.microchip.com).
V
2003 Microchip Technology Inc.
IN
V
Application Circuits
R
DD
C
1
MULTIPLE FEEDBACK LOWPASS
FILTER
1
/2
®
R
MCP6291
3
Multiple Feedback Lowpass
software, which is available on
R
C
2
3
R
C
4
4
V
OUT
3.7.2
Figure 3-7 shows a photo diode biased in the photo-
voltaic mode for high precision. The resistor R
converts the diode current I
capacitor is used to limit the bandwidth or to stabilize
the circuit against the diode’s capacitance (it is not
always needed).
FIGURE 3-7:
light
V
DD
/2
I
D
PHOTO DIODE AMPLIFIER
MCP6291/2/3/4
Photo Diode Amplifier.
MCP6291
D
to the voltage V
C
R
DS21812B-page 13
OUT
V
OUT
. The