MCP355XDV-MS1 Microchip Technology, MCP355XDV-MS1 Datasheet - Page 11

• Manufacturer Part Number: MCP355XDV-MS1
• Description: BOARD DEV SENSOR APP MCP355X
• Manufacturer: Microchip Technology

Specifications of MCP355XDV-MS1

• Number Of Adc's: 1
• Number Of Bits: 22
• Data Interface: Serial
• Inputs Per Adc: 1 Differential
• Input Range: ±0.3 V
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: MCP355x
• Processor To Be Evaluated: MCP355x
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable

2.1
FIGURE 2-1:
Results.
© 2006 Microchip Technology Inc.
OVERVIEW
PIC18F4550
USB to PC running DataView
The MCP355X Sensor Application Developer’s Board’s purpose is to ease develop-
ment of small signal sensor MCP355X applications such as weigh scales. There are
two circuits, or channels, to allow for comparison of different approaches to signal
conditioning circuits. The first channel is a low-cost, low-power signal conditioning
circuit that uses Microchip’s MCP6XX amplifiers. This circuit is intended to be a
reference design for low power, low cost MCP355X applications requiring intermediate
ranges of signal gain.
The second channel uses a precision amplifier with high gain. It is intended to be a
reference design for MCP355X circuits that can require higher resolution.
The board has jumper connections and screw terminals to connect external sensors
such as load cells or RTD temperature sensors. The board easily accomodates both
4-wire and 6-wire load cells sensor connections.
The system includes two PICmicro MCUs for firmware development and data analysis
through either an LCD display or graphically on a PC using a USB connection. A
PIC16F877 communicates with the two MCP355X channels, push-buttons and LCD
display.
For data analysis on the PC the USB PIC18F4550 is used. This device collects the
post processed PIC16F877 data and passes it via USB to the PC for display on
DataView software.
MCP355X Sensor Application Developer’s Board Functional Block Diagram and
Chapter 2. Hardware Description
4
8
DEVELOPER’S BOARD USER’S GUIDE
3
MCP355X SENSOR APPLICATION
MCP3551 ΔΣ
MCP3551 ΔΣ
Push Button Control Switches
ADC
ADC
LCD Display
CHANNEL 2
CHANNEL 1
GAIN
GAIN
DS51609A-page 7