MCP3204-CI/ST Microchip Technology, MCP3204-CI/ST Datasheet - Page 23

• Manufacturer Part Number: MCP3204-CI/ST
• Description: IC ADC 12BIT 2.7V 4CH SPI14TSSOP
• Manufacturer: Microchip Technology

Specifications of MCP3204-CI/ST

• Data Interface: Serial, SPI™
• Number Of Bits: 12
• Sampling Rate (per Second): 100k
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP (0.173", 4.40mm Width)
• Resolution (bits): 12bit
• Sampling Rate: 100kSPS
• Input Channel Type: Pseudo Differential, Single Ended
• Supply Voltage Range - Analog: 2.7V To 5.5V
• Supply Current: 320µA
• Package: 14TSSOP
• Resolution: 12 Bit
• Architecture: SAR
• Number Of Adcs: 1
• Number Of Analog Inputs: 4|2
• Digital Interface Type: Serial (4-Wire, SPI)
• Input Type: Voltage
• Polarity Of Input Voltage: Unipolar
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FIGURE 6-3:
filter for the signal being converted by the MCP3204.
6.4
When laying out a printed circuit board for use with
analog components, care should be taken to reduce
noise wherever possible. A bypass capacitor should
always be used with this device, placed as close as
possible to the device pin. A bypass capacitor value of
1 µF is recommended.
Digital and analog traces should be separated as much
as possible on the board, with no traces running
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
possible 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 return current paths and associated
errors (see
tips when using A/D converters, refer to AN688,
“Layout Tips for 12-Bit A/D converter Applications”.
© 2008 Microchip Technology Inc.
Layout Considerations
Figure
6-4). For more information on layout
V
The MCP601 Operational Amplifier is used to implement a second order anti-aliasing
IN
R
1
C
DD
R
C
1
2
0.1 µF
2
connections to
Reference
4.096V
R
MCP601
3
MCP1541
+
-
R
4
FIGURE 6-4:
‘Star’ configuration in order to reduce errors
caused by current return paths.
Device 1
1 µF
IN+
IN-
MCP3204
V
REF
Device 2
MCP3204/3208
V
DD
V
10 µF
Connection
DD
1 µF
V
traces arranged in a
DD
DS21298E-page 23
Device 3
Device 4