User manual

MCP3422 Evaluation Board for PICkit™ Serial User’s Guide

FIGURE 1-14: Reading Conversion Results. Note that the Input = 0.996V is applied at Ch.1. The

reading indicates the measured value is 0.996 Volts.

Requesting

5 Bytes

Reading Data

using a Read Command

Address Byte

Results:

Output code: F907 in hex ( = 63751 in decimal)

Output Voltage=

63751

15.625 μVLSB()

PGA

--------------------------------------------

× 0.996 Volts with PGA 1==

Note that if the differential input voltage is negative (CH- > CH+), the MSB of the first byte will be "1". In this case, the

voltage is calculated after converting the output code to 2's complement and then multiply the LSB.

See Section 4.9 of the MCP3422 Data Sheet (DS22088) for more information.

5th Byte: Repeated Byte for Configuration byte

4th byte: Configuration Byte (note that RDYbit is “0”)

3rd byte: Data Byte

2nd byte: Data Byte

1st byte: Data Byte