MCP3301-I/P Microchip Technology, MCP3301-I/P Datasheet - Page 18

• Manufacturer Part Number: MCP3301-I/P
• Description: 13-Bit Differential Input, Low Power A/D Converter with SPI Serial Interface
• Manufacturer: Microchip Technology

MCP3301
FIGURE 6-9:
used to implement a 2nd order anti-aliasing filter for
the signal being converted by the MCP3301.
6.6
When laying out a printed circuit board for use with
analog components, care should be taken to reduce
noise wherever possible. A bypass capacitor from V
to ground should always be used with this device and
should be placed as close as possible to the device pin.
A bypass capacitor value of 0.1 µF is recommended.
Digital and analog traces should be separated as much
as possible on the board and no traces should run
underneath the device or the bypass capacitor. Extra
precautions should be taken to keep traces with high
frequency signals (such as clock lines) as far as possi-
ble from analog traces.
Use of an analog ground plane is recommended in
order to keep the ground potential the same for all
devices on the board. Providing V
devices in a “star” configuration can also reduce noise
by eliminating current return paths and associated
errors. See Figure 6-10. For more information on layout
tips when using the MCP3301 or other ADC devices,
refer to AN-688 “Layout Tips for 12-Bit A/D Converter
Applications”.
DS21700A-page 18
V
IN
7.86 k
14.6 k
0.1 µF
Layout Considerations
1 µF
2.2 µF
Reference
4.096V
The MCP601 Operational Amplifier is
MCP1541
MCP601
+
-
C
L
1 µF
IN+
IN-
DD
MCP3301
V
REF
connections to
V
DD
10 µF
0.1 µF
DD
FIGURE 6-10: V
configuration in order to reduce errors caused by
current return paths.
Device 1
DD
Device 2
Connection
traces arranged in a ‘Star’
V
DD
2001 Microchip Technology Inc.
Device 3
Device 4