MCP355XDM-TAS Microchip Technology, MCP355XDM-TAS Datasheet - Page 13

• Manufacturer Part Number: MCP355XDM-TAS
• Description: BOARD DEMO TINY APP SNSR MCP355X
• Manufacturer: Microchip Technology

Specifications of MCP355XDM-TAS

• Number Of Adc's: 1
• Number Of Bits: 22
• Data Interface: Serial
• Inputs Per Adc: 1 Single Ended
• Input Range: ±3 V
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: MCP355x
• Processor To Be Evaluated: MCP355x
• Interface Type: USB
• Silicon Manufacturer: Microchip
• Silicon Core Number: MCP3551, MCP3553, MCP3550-50, MCP3550-60
• Kit Application Type: Data Converter
• Application Sub Type: ADC
• Kit Contents: Board Cable Docs
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable

© 2006 Microchip Technology Inc.
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FIGURE 2-3:
Normal Mode Rejection.
2.3.3
The high speed USB PICmicro
quickly evaluate system performance. An In-Circuit Serial Programming™ (ICSP™)
connector is also included.
2.3.4
Power supply filtering using passive components is included to improve the noise
performance of the MCP3551 device. The following circuit comprises the filtering on
the power supply, separating the analog and digital sections of the board:
2.3.5
The system noise from the MCP355X Tiny Application Sensor Demo Board will be an
aperiodic signal not having any wave or shape. This randomness is best dealt with in
statistical properties, hence the RMS measurement of the Gaussian or normal distribu-
tion. When designing a system and attempting to measure the performance, the RMS
noise is much more repeatable than the peak-to-peak noise. Figure 2-4 shows two
different distributions with different RMS and PEAK values, representing two different
ADC output distributions.
USB Power Supply
PIC18F4550
Filtering
DataView Noise Analysis
SINC filter response, MCP3551 device, simultaneous 50/60 Hz
-100
-110
-120
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
0
10 20 30 40 50 60 70 80 90 100 110
®
10 μH
microcontroller is used to connect to the PC and
1 kΩ
Frequency (Hz)
Digital
10 μF
100Ω
Analog
10 μF
Av
DS51598A-page 9
DD
, V
REF