ADM00310 Microchip Technology, ADM00310 Datasheet - Page 13

• Manufacturer Part Number: ADM00310
• Description: BOARD EVAL FOR MCP3903 AFE
• Manufacturer: Microchip Technology
• Series: -r

Specifications of ADM00310

• Design Resources: MCP3903 Eval Brd BOM MCP3903 Eval Brd Schematic
• Main Purpose: Interface, Analog Front End (AFE)
• Embedded: Yes, MCU, 16-Bit
• Utilized Ic / Part: MCP3903, PIC24F, PIC24H, dsPIC33, MCP2200
• Primary Attributes: -
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1.3
1.4
© 2011 Microchip Technology Inc.
ANALOG INPUT STRUCTURE
USB TO SERIAL CONVERTER
Two differential input paths allow external signal sources to be easily connected to the
MCP3903 input. Edge connectors JP1 and JP2 are 3-pin connectors that act both as
crew-type and clip-on post connectors.
JP1 and JP2 can be used to force either channel from a differential to a single-ended
configuration. R3 and R4 (on CH0), and R1 and R2 (on CH2) act as locations for
burden resistor connectors for any current transformer inputs.
The MCP3903 ADC Evaluation Board for 16-Bit MCUs also contains a USB connection
for connecting the evaluation board to a PC. On the board, there is an MCP2200 USB
to UART converter that creates a virtual COM port on the PC. The MCP3903 ADC
Evaluation Board for 16-Bit MCUs also features a RS232 connector just in case it is
required. The RS232 Line driver is connected to the same UART pins of the MCU. For
this reason, a 3-pin jumper (J5) is present on the evaluation board to select which serial
communication will be used: USB or RS232. The following figure summarizes the
connections between the ADC, MCU, USB to serial converter and RS232 line driver.
FIGURE 1-5:
Note:
USB con
RS232
To use an edge connector as a post connector, pull up the blue plastic top
to access the posts.
RS232 Driver
Serial Communication Block Diagram.
MCP2200
USB
RX
TX
RX
TX
RF3/U1TX
RF2/U1RX
Hardware Description
Module
PIM
RF8/SDO1
RF6/SCK1
RF7/SDI1
DS51994A-page 9
SCK
SDO
SDI
MCP3903
ADC