MCP3204-CI/ST Microchip Technology, MCP3204-CI/ST Datasheet - Page 24

• 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

MCP3204/3208
6.5
The MCP3204/3208 devices provide both digital and
analog ground connections to provide another means
of noise reduction. As shown in
and digital circuitry is separated internal to the device.
This reduces noise from the digital portion of the device
being coupled into the analog portion of the device. The
two grounds are connected internally through the
substrate, which has a resistance of 5 -10Ω.
If no ground plane is utilized, then both grounds must
be connected to V
available, both digital and analog ground pins should
be connected to the analog ground plane. If both an
analog and a digital ground plane are available, both
the digital and the analog ground pins should be
connected to the analog ground plane. Following these
steps will reduce the amount of digital noise from the
rest of the board being coupled into the A/D converter.
FIGURE 6-5:
Digital Ground Pins.
DS21298E-page 24
Digital Side
-SPI Interface
-Shift Register
-Control Logic
Utilizing the Digital and Analog
Ground Pins
DGND
Analog Ground Plane
SS
MCP3204/08
V
Substrate
on the board. If a ground plane is
5 - 10Ω
DD
Separation of Analog and
Analog Side
-Sample Cap
-Capacitor Array
-Comparator
AGND
Figure
6-5, the analog
0.1 µF
© 2008 Microchip Technology Inc.